Endurance ExerciseNCT07565168
Comparison of Training Intensity Distribution Models in Recreational Distance Runners
A study testing Polarided training intensity distribution, Threshold Training Intensity Distribution and Pyramidal Training Intensity Distribution in people with Endurance Exercise and Exercise Physiology, run by Universidad Rey Juan Carlos at 1 site in Spain.
Trial summary
This study aims to compare the effects of three different training intensity distribution (TID) models-polarized, threshold, and pyramidal-on physiological and performance adaptations in recreational distance runners. Read more about this study
- Who is it for?
- Ages 18 to 60 yearsHealthy volunteers can take part
- Conditions the study is for
- Endurance Exercise, Exercise Physiology, Running Performance
- What is being tested?
- Polarided training intensity distribution, Threshold Training Intensity Distribution and Pyramidal Training Intensity Distribution
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 24 participants
- Where
- 1 siteSpain
- Study dates
- 1 Apr 2024to 20 Apr 2026
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 60 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- age ≥ 18 years;
- a habitual training frequency of ≥ 4 sessions·week
- running experience ≥ 2 years;
- absence of musculoskeletal injuries in the preceding 3 months
Who cannot join
- an official 10-km race time > 40:00 min:s for men and > 50:00 min:s for women
- any cardiometabolic disease
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Comparison of Polarized, Pyramidal, and Threshold Training Intensity Distribution on Physiological and Performance Outcomes in Recreational Distance Runners
This study aims to compare the effects of three different training intensity distribution (TID) models-polarized, threshold, and pyramidal-on physiological and performance adaptations in recreational distance runners. Twenty-four participants will be assigned to one of the three training interventions and will complete an 8-week structured running program based on the respective TID approach.
The primary objective is to determine whether different TID models elicit distinct changes in key physiological markers and endurance performance. The study seeks to answer whether a specific intensity distribution strategy provides superior adaptations in recreational runners when training is prescribed over a controlled intervention period.
Read the detailed description
This study adopts a parallel-group experimental design to compare the effects of three training intensity distribution (TID) models-polarized, threshold, and pyramidal-on physiological and performance adaptations in recreational distance runners.
Eligible participants are required to be recreational runners with a minimum training frequency of four sessions per week. Following enrollment, all participants complete a one-week pre-intervention phase dedicated to baseline assessments and familiarization with testing procedures.
During this phase, participants will performe a comprehensive physiological evaluation to determine key endurance-related variables. These include ventilatory thresholds (e.g., VT1 and VT2), running economy, and maximal oxygen uptake (VO₂max), assessed through an incremental exercise test under standardized laboratory conditions. In addition, participants perform a 5-km time trial on a standardized course or controlled conditions to assess endurance performance.
Based on the physiological assessment, individual training intensities are prescribed using a five-zone intensity model derived from ventilatory thresholds and maximal aerobic capacity. This approach allows for precise classification of training load and ensures consistency in the application of the three TID models across participants.
Following baseline testing, participants are allocated to one of the three intervention groups (polarized, threshold, or pyramidal) and complete an 8-week structured endurance training program. Each training model differs in the relative distribution of time spent across the five intensity zones, while overall training frequency and general structure are maintained comparable between groups.
Training sessions are monitored using participants' GPS-enabled sport watches, which record variables such as duration, distance, pace, and heart rate. These data are used to quantify training load and verify adherence to the prescribed intensity distribution. Participants are instructed to follow the assigned training program and upload their training data regularly for supervision and compliance tracking.
At the end of the 8-week intervention, all baseline assessments are repeated under the same conditions. This includes the physiological testing to reassess ventilatory thresholds, running economy, and VO₂max, as well as the 5-km time trial to evaluate changes in endurance performance.
The primary aim of the study is to examine whether different TID models induce distinct adaptations in physiological determinants and performance outcomes when applied in a controlled, prospective training intervention in recreational runners.
- Conditions
- Endurance Exercise, Exercise Physiology, Running Performance
- Being tested
- Polarided training intensity distribution, Threshold Training Intensity Distribution, Pyramidal Training Intensity Distribution
- Keywords
- Endurance training, Time Trial, Training Intensity Distribution
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Polarided training intensity distributionOther
Also called POL
This intervention consists of an endurance training program based on a polarized intensity distribution model. Training intensity is prescribed using an individualized five-zone system derived from physiological assessments (e.g., ventilatory thresholds and maximal oxygen uptake). The model is characterized by a high proportion of training performed at low intensities (Zones 1-2) and a smaller but meaningful proportion at high intensities (Zones 4-5), with minimal time accumulated at moderate intensities (Zone 3). This distribution aims to maximize adaptations by combining extensive low-intensity volume with targeted high-intensity stimuli.
Threshold Training Intensity DistributionOther
Also called THR
Participants assigned to the threshold training group complete an 8-week structured endurance training program emphasizing a greater proportion of training at moderate-to-high intensities, particularly around the second ventilatory threshold. Training intensity is prescribed using an individualized five-zone model derived from baseline physiological assessments. A substantial portion of training is performed in intermediate zones (Zones 3-4), with comparatively less time spent at low (Zones 1-2) and high intensities (Zone 5). Training sessions are monitored via GPS-enabled sport watches to ensure adherence.
Pyramidal Training Intensity DistributionOther
Also called Pyr
Participants assigned to the pyramidal training group perform an 8-week structured endurance training program characterized by a progressive decrease in training volume from low to high intensities. Training intensity is prescribed using an individualized five-zone model based on baseline physiological assessments. Most training is accumulated in low-intensity zones (Zones 1-2), with moderate amounts in intermediate zones (Zone 3) and smaller proportions at higher intensities (Zones 4-5), forming a pyramidal distribution. Training load and compliance are monitored using GPS-enabled sport watches.
| Study group | Role | What they receive |
|---|---|---|
| Polarized training Intensity Distribution | Experimental | Participants assigned to the polarized training group perform an 8-week structured endurance training program characterized by a high proportion of low-intensity exercise and a smaller proportion of high-intensity exercise, with minimal time spent at moderate intensities. Training intensity is prescribed using an individualized five-zone model based on baseline physiological assessments. The majority of training is performed in the lowest intensity zones (Zones 1-2), while high-intensity sessions are conducted in the highest zones (Zones 4-5). Training load and adherence are monitored using GPS-enabled sport watches. Receives: Other: Polarided training intensity distribution |
| Threshold Training Intensity Distribution | Experimental | Participants assigned to the threshold training group complete an 8-week structured endurance training program emphasizing a greater proportion of training at moderate-to-high intensities, particularly around the second ventilatory threshold. Training intensity is prescribed using an individualized five-zone model derived from baseline physiological assessments. A substantial portion of training is performed in intermediate zones (Zones 3-4), with comparatively less time spent at low (Zones 1-2) and high intensities (Zone 5). Training sessions are monitored via GPS-enabled sport watches to ensure adherence. Receives: Other: Threshold Training Intensity Distribution |
| Pyramidal training Intensity Distribution | Experimental | Participants assigned to the pyramidal training group perform an 8-week structured endurance training program characterized by a progressive decrease in training volume from low to high intensities. Training intensity is prescribed using an individualized five-zone model based on baseline physiological assessments. Most training is accumulated in low-intensity zones (Zones 1-2), with moderate amounts in intermediate zones (Zone 3) and smaller proportions at higher intensities (Zones 4-5), forming a pyramidal distribution. Training load and compliance are monitored using GPS-enabled sport watches. Receives: Other: Pyramidal Training Intensity Distribution |
What is being measured
The primary outcome is the main question the study is designed to answer.
Maximal Oxygen Uptake (VO₂max)
Assessment of changes in maximal oxygen uptake (VO₂max) obtained during an incremental exercise test. VO₂max is used as a measure of maximal aerobic capacity and cardiorespiratory fitness.
Measured: Baseline to 8 weeks
Ventilatory Thresholds and Associated Running Speeds
Assessment of changes in the first and second ventilatory thresholds (VT1 and VT2) and their corresponding running speeds, determined during an incremental exercise test. These variables reflect submaximal endurance capacity and physiological determinants of performance and their changes after intervention.
Measured: Baseline to 8 weeks
Running Economy
Assessment of changes in running economy, defined as the oxygen cost of running at a standardized submaximal speed during laboratory testing. This measure reflects the efficiency of movement during endurance exercise.
Measured: Baseline to 8 weeks
Changes in 5-km time trial performance
Assessment of changes in endurance performance measured as completion time in a 5-km time trial conducted under standardized conditions. Pre- to post-intervention differences are used to evaluate the effect of the training interventions on real-world running performance.
Measured: Baseline to 8 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted4 May 2026
- Study start1 Apr 2024
- Primary completion30 Jul 2024
- Study completion20 Apr 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (6)Papers the sponsor has linked to this study.
- Other trials for Endurance ExerciseStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Model description
- This study follows a parallel-group interventional design in which participants are allocated to one of three training intensity distribution (TID) models: polarized, threshold, or pyramidal. Each group performs an 8-week structured endurance training program based on the assigned intensity distribution, while maintaining comparable training frequency and overall volume across groups. Training intensity is prescribed individually using a five-zone model derived from baseline physiological assessments, including ventilatory thresholds and maximal oxygen uptake (VO₂max). The primary distinction between groups lies in the relative proportion of time spent in each intensity zone, reflecting the specific characteristics of the three TID approaches. All participants undergo identical pre- and post-intervention testing procedures to assess physiological and performance adaptations. Training sessions are monitored using GPS-enabled sport watches to ensure adherence to the prescribed intensit
- Masking
- Single blind
- Who is masked
- Investigator
- Enrolment
- 24 participants (actual)
Sponsor and investigators
- Lead sponsor
- Universidad Rey Juan Carlos
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Luis Eduardo Ranieri, Universidad Rey Juan Carlos
- Investigators
- Arturo Casado, PhD, Study director, Universidad Rey Juan Carlos
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07565168
- Sponsor's protocol ID
- IND/22HUM-23661-1
- Other IDs
- IND/22HUM-23661
- Status last verified
- May 2026
- First submitted
- 27 Apr 2026
- Last updated
- 11 May 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Munoz I, Seiler S, Bautista J, Espana J, Larumbe E, Esteve-Lanao J. Does polarized training improve performance in recreational runners? Int J Sports Physiol Perform. 2014 Mar;9(2):265-72. doi: 10.1123/ijspp.2012-0350. Epub 2013 May 22.
PubMed 23752040Casado A, Gonzalez-Mohino F, Gonzalez-Rave JM, Foster C. Training Periodization, Methods, Intensity Distribution, and Volume in Highly Trained and Elite Distance Runners: A Systematic Review. Int J Sports Physiol Perform. 2022 Jun 1;17(6):820-833. doi: 10.1123/ijspp.2021-0435. Epub 2022 Apr 13.
PubMed 35418513Filipas L, Bonato M, Gallo G, Codella R. Effects of 16 weeks of pyramidal and polarized training intensity distributions in well-trained endurance runners. Scand J Med Sci Sports. 2022 Mar;32(3):498-511. doi: 10.1111/sms.14101. Epub 2021 Nov 25.
PubMed 34792817Seiler KS, Kjerland GO. Quantifying training intensity distribution in elite endurance athletes: is there evidence for an "optimal" distribution? Scand J Med Sci Sports. 2006 Feb;16(1):49-56. doi: 10.1111/j.1600-0838.2004.00418.x.
PubMed 16430681Seiler S. What is best practice for training intensity and duration distribution in endurance athletes? Int J Sports Physiol Perform. 2010 Sep;5(3):276-91. doi: 10.1123/ijspp.5.3.276.
PubMed 20861519Ranieri LE, Casado A, Martin D, Trujillo-Colmena D, Gil-Arias A, Kenneally M, Jimenez A. Performance and Physiological Effects of Race Pace-Based Versus Heart Rate Variability-Guided Training Prescription in Runners. Med Sci Sports Exerc. 2025 Jul 1;57(7):1510-1522. doi: 10.1249/MSS.0000000000003671. Epub 2025 Feb 12.
PubMed 39935030
Study at a glance
From the registry record, last updated by the sponsor on 11 May 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparison of Polarized, Pyramidal, and Threshold Training Intensity Distribution on Physiological and Performance Outcomes in Recreational Distance Runners
- ClinicalTrials.gov ID
- NCT07565168
- Acronym / sponsor ID
- IND/22HUM-23661-1
- Conditions
- Endurance Exercise, Exercise Physiology, Running Performance
- Keywords
- Endurance training, Time Trial, Training Intensity Distribution
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 24 participants (actual)
- Lead sponsor
- Universidad Rey Juan CarlosUniversity, hospital or other
- Study start
- 1 Apr 2024 (actual)
- Primary completion
- 30 Jul 2024 (actual)
- Study completion
- 20 Apr 2026 (actual)
- First posted
- 4 May 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study aims to compare the effects of three different training intensity distribution (TID) models-polarized, threshold, and pyramidal-on physiological and performance adaptations in recreational distance runners. Twenty-four participants will be assigned to one of the three training interventions and will complete an 8-week structured running program based on the respective TID approach.
The primary objective is to determine whether different TID models elicit distinct changes in key physiological markers and endurance performance. The study seeks to answer whether a specific intensity distribution strategy provides superior adaptations in recreational runners when training is prescribed over a controlled intervention period.
Detailed description
This study adopts a parallel-group experimental design to compare the effects of three training intensity distribution (TID) models-polarized, threshold, and pyramidal-on physiological and performance adaptations in recreational distance runners.
Eligible participants are required to be recreational runners with a minimum training frequency of four sessions per week. Following enrollment, all participants complete a one-week pre-intervention phase dedicated to baseline assessments and familiarization with testing procedures.
During this phase, participants will performe a comprehensive physiological evaluation to determine key endurance-related variables. These include ventilatory thresholds (e.g., VT1 and VT2), running economy, and maximal oxygen uptake (VO₂max), assessed through an incremental exercise test under standardized laboratory conditions. In addition, participants perform a 5-km time trial on a standardized course or controlled conditions to assess endurance performance.
Based on the physiological assessment, individual training intensities are prescribed using a five-zone intensity model derived from ventilatory thresholds and maximal aerobic capacity. This approach allows for precise classification of training load and ensures consistency in the application of the three TID models across participants.
Following baseline testing, participants are allocated to one of the three intervention groups (polarized, threshold, or pyramidal) and complete an 8-week structured endurance training program. Each training model differs in the relative distribution of time spent across the five intensity zones, while overall training frequency and general structure are maintained comparable between groups.
Training sessions are monitored using participants' GPS-enabled sport watches, which record variables such as duration, distance, pace, and heart rate. These data are used to quantify training load and verify adherence to the prescribed intensity distribution. Participants are instructed to follow the assigned training program and upload their training data regularly for supervision and compliance tracking.
At the end of the 8-week intervention, all baseline assessments are repeated under the same conditions. This includes the physiological testing to reassess ventilatory thresholds, running economy, and VO₂max, as well as the 5-km time trial to evaluate changes in endurance performance.
The primary aim of the study is to examine whether different TID models induce distinct adaptations in physiological determinants and performance outcomes when applied in a controlled, prospective training intervention in recreational runners.
Study design
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (investigator)
- Number of arms
- 3
- Model description
- This study follows a parallel-group interventional design in which participants are allocated to one of three training intensity distribution (TID) models: polarized, threshold, or pyramidal. Each group performs an 8-week structured endurance training program based on the assigned intensity distribution, while maintaining comparable training frequency and overall volume across groups. Training intensity is prescribed individually using a five-zone model derived from baseline physiological assessments, including ventilatory thresholds and maximal oxygen uptake (VO₂max). The primary distinction between groups lies in the relative proportion of time spent in each intensity zone, reflecting the specific characteristics of the three TID approaches. All participants undergo identical pre- and post-intervention testing procedures to assess physiological and performance adaptations. Training sessions are monitored using GPS-enabled sport watches to ensure adherence to the prescribed intensit
| Arm | Type | Receives |
|---|---|---|
| Polarized training Intensity Distribution | Experimental | Other: Polarided training intensity distributionParticipants assigned to the polarized training group perform an 8-week structured endurance training program characterized by a high proportion of low-intensity exercise and a smaller proportion of high-intensity exercise, with minimal time spent at moderate intensities. Training intensity is prescribed using an individualized five-zone model based on baseline physiological assessments. The majority of training is performed in the lowest intensity zones (Zones 1-2), while high-intensity sessions are conducted in the highest zones (Zones 4-5). Training load and adherence are monitored using GPS-enabled sport watches. |
| Threshold Training Intensity Distribution | Experimental | Other: Threshold Training Intensity DistributionParticipants assigned to the threshold training group complete an 8-week structured endurance training program emphasizing a greater proportion of training at moderate-to-high intensities, particularly around the second ventilatory threshold. Training intensity is prescribed using an individualized five-zone model derived from baseline physiological assessments. A substantial portion of training is performed in intermediate zones (Zones 3-4), with comparatively less time spent at low (Zones 1-2) and high intensities (Zone 5). Training sessions are monitored via GPS-enabled sport watches to ensure adherence. |
| Pyramidal training Intensity Distribution | Experimental | Other: Pyramidal Training Intensity DistributionParticipants assigned to the pyramidal training group perform an 8-week structured endurance training program characterized by a progressive decrease in training volume from low to high intensities. Training intensity is prescribed using an individualized five-zone model based on baseline physiological assessments. Most training is accumulated in low-intensity zones (Zones 1-2), with moderate amounts in intermediate zones (Zone 3) and smaller proportions at higher intensities (Zones 4-5), forming a pyramidal distribution. Training load and compliance are monitored using GPS-enabled sport watches. |
Who may qualify
- Ages
- 18 to 60 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (4 listed)
- age ≥ 18 years;
- a habitual training frequency of ≥ 4 sessions·week
- running experience ≥ 2 years;
- absence of musculoskeletal injuries in the preceding 3 months
Key exclusion criteria (2 listed)
- an official 10-km race time > 40:00 min:s for men and > 50:00 min:s for women
- any cardiometabolic disease
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Polarided training intensity distributionAlso: POLThis intervention consists of an endurance training program based on a polarized intensity distribution model. Training intensity is prescribed using an individualized five-zone system derived from physiological assessments (e.g., ventilatory thresholds and maximal oxygen uptake). The model is characterized by a high proportion of training performed at low intensities (Zones 1-2) and a smaller but meaningful proportion at high intensities (Zones 4-5), with minimal time accumulated at moderate intensities (Zone 3). This distribution aims to maximize adaptations by combining extensive low-intensity volume with targeted high-intensity stimuli. | Other | Polarized training Intensity Distribution |
| Threshold Training Intensity DistributionAlso: THRParticipants assigned to the threshold training group complete an 8-week structured endurance training program emphasizing a greater proportion of training at moderate-to-high intensities, particularly around the second ventilatory threshold. Training intensity is prescribed using an individualized five-zone model derived from baseline physiological assessments. A substantial portion of training is performed in intermediate zones (Zones 3-4), with comparatively less time spent at low (Zones 1-2) and high intensities (Zone 5). Training sessions are monitored via GPS-enabled sport watches to ensure adherence. | Other | Threshold Training Intensity Distribution |
| Pyramidal Training Intensity DistributionAlso: PyrParticipants assigned to the pyramidal training group perform an 8-week structured endurance training program characterized by a progressive decrease in training volume from low to high intensities. Training intensity is prescribed using an individualized five-zone model based on baseline physiological assessments. Most training is accumulated in low-intensity zones (Zones 1-2), with moderate amounts in intermediate zones (Zone 3) and smaller proportions at higher intensities (Zones 4-5), forming a pyramidal distribution. Training load and compliance are monitored using GPS-enabled sport watches. | Other | Pyramidal training Intensity Distribution |
Primary outcome
Maximal Oxygen Uptake (VO₂max)
Time frame: Baseline to 8 weeks
Assessment of changes in maximal oxygen uptake (VO₂max) obtained during an incremental exercise test. VO₂max is used as a measure of maximal aerobic capacity and cardiorespiratory fitness.
Ventilatory Thresholds and Associated Running Speeds
Time frame: Baseline to 8 weeks
Assessment of changes in the first and second ventilatory thresholds (VT1 and VT2) and their corresponding running speeds, determined during an incremental exercise test. These variables reflect submaximal endurance capacity and physiological determinants of performance and their changes after intervention.
Running Economy
Time frame: Baseline to 8 weeks
Assessment of changes in running economy, defined as the oxygen cost of running at a standardized submaximal speed during laboratory testing. This measure reflects the efficiency of movement during endurance exercise.
Changes in 5-km time trial performance
Time frame: Baseline to 8 weeks
Assessment of changes in endurance performance measured as completion time in a 5-km time trial conducted under standardized conditions. Pre- to post-intervention differences are used to evaluate the effect of the training interventions on real-world running performance.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 11 May 2026.
- Background: PubMed 23752040Munoz I, Seiler S, Bautista J, Espana J, Larumbe E, Esteve-Lanao J. Does polarized training improve performance in recreational runners? Int J Sports Physiol Perform. 2014 Mar;9(2):265-72. doi: 10.1123/ijspp.2012-0350. Epub 2013 May 22.
- Background: PubMed 35418513Casado A, Gonzalez-Mohino F, Gonzalez-Rave JM, Foster C. Training Periodization, Methods, Intensity Distribution, and Volume in Highly Trained and Elite Distance Runners: A Systematic Review. Int J Sports Physiol Perform. 2022 Jun 1;17(6):820-833. doi: 10.1123/ijspp.2021-0435. Epub 2022 Apr 13.
- Background: PubMed 34792817Filipas L, Bonato M, Gallo G, Codella R. Effects of 16 weeks of pyramidal and polarized training intensity distributions in well-trained endurance runners. Scand J Med Sci Sports. 2022 Mar;32(3):498-511. doi: 10.1111/sms.14101. Epub 2021 Nov 25.
- Background: PubMed 16430681Seiler KS, Kjerland GO. Quantifying training intensity distribution in elite endurance athletes: is there evidence for an "optimal" distribution? Scand J Med Sci Sports. 2006 Feb;16(1):49-56. doi: 10.1111/j.1600-0838.2004.00418.x.
- Background: PubMed 20861519Seiler S. What is best practice for training intensity and duration distribution in endurance athletes? Int J Sports Physiol Perform. 2010 Sep;5(3):276-91. doi: 10.1123/ijspp.5.3.276.
- Background: PubMed 39935030Ranieri LE, Casado A, Martin D, Trujillo-Colmena D, Gil-Arias A, Kenneally M, Jimenez A. Performance and Physiological Effects of Race Pace-Based Versus Heart Rate Variability-Guided Training Prescription in Runners. Med Sci Sports Exerc. 2025 Jul 1;57(7):1510-1522. doi: 10.1249/MSS.0000000000003671. Epub 2025 Feb 12.
- Individual participant dataSharing planned: No
Related trials for Endurance Exercise
Recruiting
Acute Effects of Post-Exercise Hyperoxia on Recovery in Cycling
Athletic Performance, Hyperbaric Oxygenation
Recruiting
The Effect of Two Different Exercise Programs in Young Sailors
Healthy Volunteers
Active, not recruiting
Effects of Short-term Adaptation to Ketogenic Diet on Endurance Trained Athletes
Ketogenic Diet, Control Condition
Active, not recruiting
Flexibility, Resistance, Aerobic, Movement Execution Training in Adults With Hereditary Spastic Paraplegia
Hereditary Spastic Paraplegia
Recruiting
Effectivity of P1821, a Novel Tongue Strengthening and Endurance Enhancing Speech Flow Exercise
Ankyloglossia, Impairment of Speech
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Arturo Casado, PhD study director
Universidad Rey Juan Carlos
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Polarided training intensity distribution, Threshold Training Intensity Distribution and Pyramidal Training Intensity Distribution in people with Endurance Exercise and Exercise Physiology, run by Universidad Rey Juan Carlos at 1 site in Spain.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 11 May 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Spain. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Maximal Oxygen Uptake (VO₂max) (time frame: Baseline to 8 weeks). The study lists 4 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT07565168, which also lists 6 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 11 May 2026.