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The goal of this trial is to see if using a maximal effort, short cycling test is better at activating muscles to improve vertical jump height compared to a maximal effort back squat. The study looks to answer three questions:
Participants will be asked to come to the lab for three visits. On the first visit, they will perform informed consent, have anthropometrics taken, and will provide data to assess weightlifting history and factors that may influence the impact of each intervention. They will perform a 1 repetition max (RM) test for the back squat in order to properly dose the back squat potentiation activity. Visits 2 and 3 will be randomized; one will use the back squat (control) and the other will use the Wingate bike test (experimental) to potentiate vertical jump height as measured by the counter movement jump (CMJ). In each session, a warm up will be performed and the baseline CMJ will be performed. The intervention will be performed, either the 30 second Wingate protocol which is a maximal effort cycling test, or the back squat at a high percent of the 1 RM. The CMJ will be reassessed at 3, 6, and 9 minutes after completed each intervention.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Back squat | Active Comparator | Participants will perform 2 sets of 3 repetitions at 85% of their 1 repetition maximum weight for the back squat |
|
| Wingate test | Experimental | Participants will perform the Wingate bike test, with resistance at 7.5% of body weight, with a maximal effort for 30 seconds. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Back squat | Other | 2 sets of 3 repetitions of a back squat, set to 85% of the 1 repetition maximum weight |
|
| Measure | Description | Time Frame |
|---|---|---|
| Vertical Jump Height | Measured with the Counter Movement Jump (CMJ). This measures the vertical distance a participant is able to jump from a standing, stationary position. Video capture and motion analysis software will be used to analyze the jump and determine vertical displacement of a marker placed at the participants sacrum. Vertical jump height will be measured in meters. | Visit 2 (1 week post- enrollment); visit 3 (2 weeks post-enrollment) |
| Measure | Description | Time Frame |
|---|---|---|
| Years of resistance training experience | This factor will be collected to examine its predictive impact on the Wingate test's potentiation effect. The number of years of resistance training each participants has participated in will be collected. | Collected at visit 1, upon enrollment into the study |
| One-Repetition Maximum Back Squat Strength |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Erin McCallister, DPT | Louisiana State University Health Sciences Center Shreveport | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| LSU Health Shreveport School of Allied Health Professions | Shreveport | Louisiana | 71103 | United States |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 34567370 | Background | Sirieiro P, Nasser I, Dobbs WC, Willardson JM, Miranda H. The Effect of Set Configuration and Load on Post-Activation Potentiation on Vertical Jump in Athletes. Int J Exerc Sci. 2021 Aug 1;14(4):902-911. doi: 10.70252/CCLW6758. eCollection 2021. | |
| 20072066 | Background | Jo E, Judelson DA, Brown LE, Coburn JW, Dabbs NC. Influence of recovery duration after a potentiating stimulus on muscular power in recreationally trained individuals. J Strength Cond Res. 2010 Feb;24(2):343-7. doi: 10.1519/JSC.0b013e3181cc22a4. |
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All of the individual participant data collected during the trial, after deidentification.
Available 3 months following publication of findings, no end date (link to be provided)
Researchers wishing to access the data
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| Wingate test | Other | 30 second maximal effort cycling test, with resistance at 7.5% bodyweight |
|
This factor will be collected to examine its predictive impact on the Wingate test's potentiation effect. The 1 repetition maximum weight in kilograms for the back squat exercise will be collected. |
| Collected at visit 1, upon enrollment into the study |
| 23442291 | Background | Esformes JI, Bampouras TM. Effect of back squat depth on lower-body postactivation potentiation. J Strength Cond Res. 2013 Nov;27(11):2997-3000. doi: 10.1519/JSC.0b013e31828d4465. |
| 23007485 | Background | Lowery RP, Duncan NM, Loenneke JP, Sikorski EM, Naimo MA, Brown LE, Wilson FG, Wilson JM. The effects of potentiating stimuli intensity under varying rest periods on vertical jump performance and power. J Strength Cond Res. 2012 Dec;26(12):3320-5. doi: 10.1519/JSC.0b013e318270fc56. |
| 20393352 | Background | McCann MR, Flanagan SP. The effects of exercise selection and rest interval on postactivation potentiation of vertical jump performance. J Strength Cond Res. 2010 May;24(5):1285-91. doi: 10.1519/JSC.0b013e3181d6867c. |