Resistance TrainingNCT05987046
Contrast Training, Post-activation Countermovement Jump Performance in High Strength Male
A study testing Contrast training in people with Resistance Training, run by National Taiwan Sport University at 1 site in Taiwan.
Trial summary
The study investigated the effects of three contrast training sessions in a week on post-activation countermovement jump performance in high strength male. Read more about this study
- Who is it for?
- Ages 18 to 30 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Resistance Training
- What is being tested?
- Contrast training
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 21 participants
- Where
- 1 siteTaiwan
- Study dates
- 4 Sep 2023to 26 Jan 2024
- 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 30 years
- Men only
- Healthy volunteers accepted
- Adult
Who may be able to join
- Least 2 years of resistance training experience.
- Least 1.75 times body weight of squat 1RM
- Currently engaged in regular exercise training.
Who cannot join
- Skeletal muscle injury within the past six months.
- Non-responders to PAPE
Trial locations and contacts
1 site in 1 country.
About this study
Official title: The Effects of Three Contrast Training Sessions in a Week on Post-activation Countermovement Jump Performance in High Strength Male
The study investigated the effects of three contrast training sessions in a week on post-activation countermovement jump performance in high strength male.
Read the detailed description
Previous researches indicated that the primary contributor of contrast training to improving explosive performance might be the phenomenon of post-activation performance enhancement (PAPE), with emphasis on conducting plyometric training at the optimal PAPE time. However, the PAPE appeared to be susceptible to fatigue and delayed potentiation of neuromuscular performance. Thus, its applicability in practical training is not yet clarified. The purposes of this study are to: 1) examine the effects of three contrast training sessions in a week on individual and group's PAPE and the optimal timepoint of PAPE; 2) assess the intrasession and intersession reliability of the optimal PAPE timepoints of both individuals and groups; 3) determine the relationship between kinematic parameters during resistance training and PAPE.
Qualified participants will visit the laboratory five times for experimental familiarization, One repetition maximum (1RM) of parallel squat test, and three contrast training sessions, with each contrast training session consisting of three sets of parallel squats in a week. Alongside this, countermovement jump tests will be conducted before the first set of squats and at 1, 3, 5, 7, 9, and 11 minutes after each squat set, with the kinematic parameters of the parallel squats also being collected.
- Conditions
- Resistance Training
- Being tested
- Contrast training
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Contrast trainingBehavioural
Three sets of three repetitions of parallel squats at 90% of 1RM
| Study group | Role | What they receive |
|---|---|---|
| Contrast training sessions | Experimental | Participants will perform three contrast training sessions for a week. Receives: Behavioral: Contrast training |
What is being measured
The primary outcome is the main question the study is designed to answer.
post-activation performance enhancement (PAPE)
PAPE will be evaluated by maximum height of countermovement jump in this study.
Measured: Change in baseline and 1, 3, 5, 7, 9, and 11 minutes after each squat set.
Within-group neuromuscular fatigue
Within-group neuromuscular fatigue will be evaluated by velocity loss rate calculated from maximum and minimum concentric mean velocities of each set for squat in this study.
Measured: Up to 2 weeks.
Between-group neuromuscular fatigue
Between-group neuromuscular fatigue will be evaluated by the fastest mean concentric velocity of each squat set in this study.
Measured: Up to 2 weeks.
Between-day squat performance
Between-day squat performance will be evaluated by the fastest mean concentric velocity of first squat set for each contrast training in this study.
Measured: Up to 2 weeks.
Delayed potentiation of neuromuscular performance (DPNP)
DPNP will be evaluated by maximum height of countermovement jump in this study.
Measured: Up to 2 weeks.
Secondary outcomes (17)
Weight
Weight in kilograms.
Measured: Baseline
Height in meters
Height in meters.
Measured: Baseline
Body fat
The body weight and fat weight will be combined to calculate the body fat in percentage.
Measured: Baseline
Squat 1RM
Squat 1RM will be evaluated maximum weight lifted for 1 repetition of squat in this study.
Measured: Baseline
Concentric mean force of squat
Concentric mean force in newtons.
Measured: Up to 2 weeks.
Concentric peak force of squat
concentric peak force in newtons.
Measured: Up to 2 weeks.
Concentric mean velocity of squat
Concentric mean velocity in meters per second.
Measured: Up to 2 weeks.
Concentric mean velocity loss of squat
Concentric mean velocity loss in percentage.
Measured: Up to 2 weeks.
Concentric peak velocity of squat
Concentric mean velocity in meters per second.
Measured: Up to 2 weeks.
Concentric mean power of squat
concentric mean velocity in watts.
Measured: Up to 2 weeks.
Concentric peak power of squat
Concentric peak power in watts.
Measured: Up to 2 weeks.
Concentric rep duration of squat
Concentric rep duration in scend.
Measured: Up to 2 weeks.
Dip of squat
Dip in meters.
Measured: Up to 2 weeks.
Eccentric min velocity of squat
Eccentric min velocity in meters per second.
Measured: Up to 2 weeks.
Eccentric peak velocity of squat
Eccentric peak velocity in meters per second.
Measured: Up to 2 weeks.
Eccentric peak force of squat
Eccentric peak force in newtons.
Measured: Up to 2 weeks.
Vertical distance of squat
Vertical distance in meters.
Measured: Up to 2 weeks.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted14 Aug 2023
- Study start4 Sep 2023
- Primary completion26 Jan 2024
- Study completion26 Jan 2024
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Resistance TrainingStudies 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
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 21 participants (actual)
Sponsor and investigators
- Lead sponsor
- National Taiwan Sport University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Tzai-Li Li, National Taiwan Sport University
- Investigators
- Tzai-Li Li, Phd, Study director, National Taiwan Sport University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05987046
- Sponsor's protocol ID
- NationalTaiwanSportU
- Status last verified
- Apr 2024
- First submitted
- 23 Jul 2023
- Last updated
- 9 Apr 2024
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 9 Apr 2024. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effects of Three Contrast Training Sessions in a Week on Post-activation Countermovement Jump Performance in High Strength Male
- ClinicalTrials.gov ID
- NCT05987046
- Acronym / sponsor ID
- NationalTaiwanSportU
- Conditions
- Resistance Training
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 21 participants (actual)
- Lead sponsor
- National Taiwan Sport UniversityUniversity, hospital or other
- Study start
- 4 Sep 2023 (actual)
- Primary completion
- 26 Jan 2024 (actual)
- Study completion
- 26 Jan 2024 (actual)
- First posted
- 14 Aug 2023 (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.
The study investigated the effects of three contrast training sessions in a week on post-activation countermovement jump performance in high strength male.
Detailed description
Previous researches indicated that the primary contributor of contrast training to improving explosive performance might be the phenomenon of post-activation performance enhancement (PAPE), with emphasis on conducting plyometric training at the optimal PAPE time. However, the PAPE appeared to be susceptible to fatigue and delayed potentiation of neuromuscular performance. Thus, its applicability in practical training is not yet clarified. The purposes of this study are to: 1) examine the effects of three contrast training sessions in a week on individual and group's PAPE and the optimal timepoint of PAPE; 2) assess the intrasession and intersession reliability of the optimal PAPE timepoints of both individuals and groups; 3) determine the relationship between kinematic parameters during resistance training and PAPE.
Qualified participants will visit the laboratory five times for experimental familiarization, One repetition maximum (1RM) of parallel squat test, and three contrast training sessions, with each contrast training session consisting of three sets of parallel squats in a week. Alongside this, countermovement jump tests will be conducted before the first set of squats and at 1, 3, 5, 7, 9, and 11 minutes after each squat set, with the kinematic parameters of the parallel squats also being collected.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Contrast training sessions | Experimental | Behavioral: Contrast trainingParticipants will perform three contrast training sessions for a week. |
Who may qualify
- Ages
- 18 to 30 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (3 listed)
- Least 2 years of resistance training experience.
- Least 1.75 times body weight of squat 1RM
- Currently engaged in regular exercise training.
Key exclusion criteria (2 listed)
- Skeletal muscle injury within the past six months.
- Non-responders to PAPE
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 |
|---|---|---|
| Contrast trainingThree sets of three repetitions of parallel squats at 90% of 1RM | Behavioural | Contrast training sessions |
Primary outcome
post-activation performance enhancement (PAPE)
Time frame: Change in baseline and 1, 3, 5, 7, 9, and 11 minutes after each squat set.
PAPE will be evaluated by maximum height of countermovement jump in this study.
Within-group neuromuscular fatigue
Time frame: Up to 2 weeks.
Within-group neuromuscular fatigue will be evaluated by velocity loss rate calculated from maximum and minimum concentric mean velocities of each set for squat in this study.
Between-group neuromuscular fatigue
Time frame: Up to 2 weeks.
Between-group neuromuscular fatigue will be evaluated by the fastest mean concentric velocity of each squat set in this study.
Between-day squat performance
Time frame: Up to 2 weeks.
Between-day squat performance will be evaluated by the fastest mean concentric velocity of first squat set for each contrast training in this study.
Delayed potentiation of neuromuscular performance (DPNP)
Time frame: Up to 2 weeks.
DPNP will be evaluated by maximum height of countermovement jump in this study.
17 secondary outcomes
Weight
Time frame: Baseline
Height in meters
Time frame: Baseline
Body fat
Time frame: Baseline
Squat 1RM
Time frame: Baseline
Concentric mean force of squat
Time frame: Up to 2 weeks.
Concentric peak force of squat
Time frame: Up to 2 weeks.
Concentric mean velocity of squat
Time frame: Up to 2 weeks.
Concentric mean velocity loss of squat
Time frame: Up to 2 weeks.
Concentric peak velocity of squat
Time frame: Up to 2 weeks.
Concentric mean power of squat
Time frame: Up to 2 weeks.
Concentric peak power of squat
Time frame: Up to 2 weeks.
Concentric rep duration of squat
Time frame: Up to 2 weeks.
Dip of squat
Time frame: Up to 2 weeks.
Eccentric min velocity of squat
Time frame: Up to 2 weeks.
Eccentric peak velocity of squat
Time frame: Up to 2 weeks.
Eccentric peak force of squat
Time frame: Up to 2 weeks.
Vertical distance of squat
Time frame: Up to 2 weeks.
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 9 Apr 2024.
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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.
Tzai-Li Li, Phd study director
National Taiwan Sport University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Contrast training in people with Resistance Training, run by National Taiwan Sport University at 1 site in Taiwan.
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 3 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 9 Apr 2024. 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 Taiwan. 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?
post-activation performance enhancement (PAPE) (time frame: Change in baseline and 1, 3, 5, 7, 9, and 11 minutes after each squat set.). The study lists 5 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
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 9 Apr 2024.