Instability, JointNCT04771494
Effect of Instability on Power and Speed in Bench Press
A study testing Power and execution speed as a function of instability experience in people with Instability, Joint, run by Universidad Politecnica de Madrid at 1 site in Spain.
Trial summary
The aim of this study was to analyse and compare the speed and power parameters in bench press training in different degrees of instability: 1) stable (PBE), 2) with asymmetric load (PBA), 3) with oscillating load (PBO), 4) on fitball (PBF) and 5) on bosu (PBB). Read more about this study
- Who is it for?
- Ages 18 to 65 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Instability, Joint
- What is being tested?
- Power and execution speed as a function of instability experience
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 20 participants
- Where
- 1 siteSpain
- Study dates
- 1 Sep 2019to 17 May 2020
- 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 65 years
- Men only
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- two years of continuous strength training experience
- a minimum of 6 months of suspended training experience
Who cannot join
- Athletes who presented pain or skeletal or neuromuscular disorder
Trial locations and contacts
1 site in 1 country.
Spain1 site
Facultad Ciencias de la Actividad Física y del Deporte
Madrid, 28040
About this study
The aim of this study was to analyse and compare the speed and power parameters in bench press training in different degrees of instability: 1) stable (PBE), 2) with asymmetric load (PBA), 3) with oscillating load (PBO), 4) on fitball (PBF) and 5) on bosu (PBB). For this purpose, 20 male subjects (10 trained and 10 untrained) with specific experience in training under unstable conditions were evaluated with respect to mean propulsive velocity (MPV), maximum velocity (MV) and power (POT) with different types of external load: low load (40% of 1RM), medium load (60% of 1RM) and high load (80% of 1RM) in each condition.
Read the detailed description
Therefore, the aim of this study was to analyse the effect of different degrees of instability on power and speed of execution in the bench press exercise. For the design of this quasi-experimental research, with an ad hoc protocol, an intersubject comparison was used in 5 different conditions. 20 male participants were grouped into two groups based on their previous experience with unstable training and volunteered for this study. Expert group (n= 10; 23.70 ± 4.30 years; 81.40 ± 9.67 kg; 179.50 ± 8.95 cm; 3.5 ± 4.10 years of strength training experience; 9 ± 10.60 months of unstable training experience) Novice group (n= 10; 25.60 ± 6.50 years; 77.80 ± 4.44 kg; 176.40 ± 2.80 cm; 3.40 ± 1.96 years of strength training experience; 0.90 ± 0.99 months of unstable training experience). Subjects with no experience in training with unstable loads (having implemented unstable loads in their training at some point) or current or recent injuries (within the last 6 months) that caused them to alter their normal physical activity were excluded from this study. This study was in accordance with the Declaration of Helsinki (2013). All participants gave written informed consent prior to the study.
Subjects performed the bench press exercise by assessing mean propulsive velocity and power with 3 different loads for each of the unstable situations: light (40% of 1RM), moderate (60% of 1RM) and high (80% of 1RM). In a familiarisation session, subjects performed the relative loads with each condition to determine their strength-velocity profiles and their optimal work percentages. In addition, an incremental load test was performed to determine the 1RM of each of the participants to determine the external load for each load percentage in each of the subjects.
- Conditions
- Instability, Joint
- Being tested
- Power and execution speed as a function of instability experience
- Keywords
- Strength Training, Unstable Devices, Balance, Speed Training, Core
- Medical subject headings
- Joint Instability
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Power and execution speed as a function of instability experienceOther
Each subject performed 3 repetitions for the light load (40% RM; VMP > 1.0 m/s), with 1 minute rest; 2 repetitions for the medium load (60% RM; 0.65 m/s ≤ VMP ≤ 1.0 m/s) with 2 minutes rest and 1 repetition for the heavy load (80% RM; VMP < 0.65 m/s) with 4 minutes rest. A metronome was used for the start countdown and to time the eccentric and concentric portions of the exercise.
Subjects began the bench press with their elbows fully extended, maintaining a grip distance slightly greater than shoulder width. The bar was then lowered to their chest and then applying as much thrust as possible until full elbow extension on a 2-1-0 count. The timing sequence involved 2 seconds for the eccentric phase, a 1 second hold (to minimise the contribution of the rebound effect and allow for more reproducible and consistent measurements) and for the concentric "up" phase the highest possible execution speed, until the bar returned to the starting position.
| Study group | Role | What they receive |
|---|---|---|
| Trained | Experimental | Participants with at least 6 months of training with unstable devices Receives: Other: Power and execution speed as a function of instability experience |
| Untrained | Experimental | Participants with no previous instability experience Receives: Other: Power and execution speed as a function of instability experience |
What is being measured
The primary outcome is the main question the study is designed to answer.
Power
the ability to perform different actions, developing maximum strength in a short time
Measured: 1 month
Maximum Speed
maximum value of m/s reached during the exercise
Measured: 1 month
Mean Propulsive Speed
the average speed reached during the concentric phase of the exercise is recorded
Measured: 1 month
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted25 Feb 2021
- Study start1 Sep 2019
- Primary completion28 Feb 2020
- Study completion17 May 2020
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Instability, JointStudies 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
- Non-randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 20 participants (actual)
Sponsor and investigators
- Lead sponsor
- Universidad Politecnica de Madrid
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Moisés Marquina Nieto, Universidad Politecnica de Madrid
- Investigators
- Moisés M Marquina Nieto, Principal investigator, Univerdidad Politécnica de Madrid
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04771494
- Sponsor's protocol ID
- Power and speed in instability
- Status last verified
- Feb 2021
- First submitted
- 22 Feb 2021
- Last updated
- 25 Feb 2021
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 25 Feb 2021. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effect of Instability on Power and Speed in Bench Press
- ClinicalTrials.gov ID
- NCT04771494
- Acronym / sponsor ID
- Power and speed in instability
- Conditions
- Instability, Joint
- Keywords
- Strength Training, Unstable Devices, Balance, Speed Training, Core
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 20 participants (actual)
- Lead sponsor
- Universidad Politecnica de MadridUniversity, hospital or other
- Study start
- 1 Sep 2019 (actual)
- Primary completion
- 28 Feb 2020 (actual)
- Study completion
- 17 May 2020 (actual)
- First posted
- 25 Feb 2021 (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 aim of this study was to analyse and compare the speed and power parameters in bench press training in different degrees of instability: 1) stable (PBE), 2) with asymmetric load (PBA), 3) with oscillating load (PBO), 4) on fitball (PBF) and 5) on bosu (PBB). For this purpose, 20 male subjects (10 trained and 10 untrained) with specific experience in training under unstable conditions were evaluated with respect to mean propulsive velocity (MPV), maximum velocity (MV) and power (POT) with different types of external load: low load (40% of 1RM), medium load (60% of 1RM) and high load (80% of 1RM) in each condition.
Detailed description
Therefore, the aim of this study was to analyse the effect of different degrees of instability on power and speed of execution in the bench press exercise. For the design of this quasi-experimental research, with an ad hoc protocol, an intersubject comparison was used in 5 different conditions. 20 male participants were grouped into two groups based on their previous experience with unstable training and volunteered for this study. Expert group (n= 10; 23.70 ± 4.30 years; 81.40 ± 9.67 kg; 179.50 ± 8.95 cm; 3.5 ± 4.10 years of strength training experience; 9 ± 10.60 months of unstable training experience) Novice group (n= 10; 25.60 ± 6.50 years; 77.80 ± 4.44 kg; 176.40 ± 2.80 cm; 3.40 ± 1.96 years of strength training experience; 0.90 ± 0.99 months of unstable training experience). Subjects with no experience in training with unstable loads (having implemented unstable loads in their training at some point) or current or recent injuries (within the last 6 months) that caused them to alter their normal physical activity were excluded from this study. This study was in accordance with the Declaration of Helsinki (2013). All participants gave written informed consent prior to the study.
Subjects performed the bench press exercise by assessing mean propulsive velocity and power with 3 different loads for each of the unstable situations: light (40% of 1RM), moderate (60% of 1RM) and high (80% of 1RM). In a familiarisation session, subjects performed the relative loads with each condition to determine their strength-velocity profiles and their optimal work percentages. In addition, an incremental load test was performed to determine the 1RM of each of the participants to determine the external load for each load percentage in each of the subjects.
Study design
- Primary purpose
- Other
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (participant)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Trained | Experimental | Other: Power and execution speed as a function of instability experienceParticipants with at least 6 months of training with unstable devices |
| Untrained | Experimental | Other: Power and execution speed as a function of instability experienceParticipants with no previous instability experience |
Who may qualify
- Ages
- 18 to 65 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- two years of continuous strength training experience
- a minimum of 6 months of suspended training experience
Key exclusion criteria (1 listed)
- Athletes who presented pain or skeletal or neuromuscular disorder
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 |
|---|---|---|
| Power and execution speed as a function of instability experienceEach subject performed 3 repetitions for the light load (40% RM; VMP > 1.0 m/s), with 1 minute rest; 2 repetitions for the medium load (60% RM; 0.65 m/s ≤ VMP ≤ 1.0 m/s) with 2 minutes rest and 1 repetition for the heavy load (80% RM; VMP < 0.65 m/s) with 4 minutes rest. A metronome was used for the start countdown and to time the eccentric and concentric portions of the exercise. Subjects began the bench press with their elbows fully extended, maintaining a grip distance slightly greater than shoulder width. The bar was then lowered to their chest and then applying as much thrust as possible until full elbow extension on a 2-1-0 count. The timing sequence involved 2 seconds for the eccentric phase, a 1 second hold (to minimise the contribution of the rebound effect and allow for more reproducible and consistent measurements) and for the concentric "up" phase the highest possible execution speed, until the bar returned to the starting position. | Other | Trained, Untrained |
Primary outcome
Power
Time frame: 1 month
the ability to perform different actions, developing maximum strength in a short time
Maximum Speed
Time frame: 1 month
maximum value of m/s reached during the exercise
Mean Propulsive Speed
Time frame: 1 month
the average speed reached during the concentric phase of the exercise is recorded
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 25 Feb 2021.
- Individual participant dataSharing planned: No
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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.
Moisés M Marquina Nieto principal investigator
Univerdidad Politécnica de Madrid
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Power and execution speed as a function of instability experience in people with Instability, Joint, run by Universidad Politecnica de Madrid 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 2 inclusion and 1 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 25 Feb 2021. 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?
Power (time frame: 1 month). The study lists 3 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 25 Feb 2021.