Efficiency in 4-week Plyometric Training: Lower Limb Improvement in Sedentary Adults

Study Overview
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Brief Summary
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The goal of this clinical trial is to compare the effects of different volumes of plyometric training on lower limb muscle strength, power, and muscle activity in sedentary individuals. The main question[s] it aims to answer are: What is the minimum volume of plyometric training that can induce changes in lower limb strength and power variables? How does muscle activity in the lower limbs vary with different volumes of plyometric training? Participants will be asked to: Complete questionnaires to determine their level of physical activity. Attend pre and post-evaluations of lower limb muscle activity, strength, and power during an instrumented sit-to-stand test. Perform lower limb plyometric exercises, such as jumps, hops, and bounds. Attend supervised training sessions three times a week for a duration of 4 weeks. Researchers will compare three groups to see if the minimum volume of plyometric training can be identified.

Official Title
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Determining the Minimum Effective Volume of Plyometric Training for Inducing Changes in Lower Limb Strength, Power, and Muscle Electrical Activity During Functional Performance Testing in Sedentary Individuals

Conditions
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Plyometric Exercise, Sedentary Behavior

Intervention / Treatment
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* Other: plyometric training protocol


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Subjects without lower limb musculoskeletal injuries in the past six months. Without previous lower limb surgery in the past two years Being sedentary Exclusion Criteria: Medical conditions that could compromise their participation (including cardiovascular disease).

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 35 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Volume Training Group<br>Participants in this group will undergo a plyometric training protocol at a known effective volume that is expected to induce changes in lower limb strength, power, and muscle activity. | Other: plyometric training protocol<br>* The plyometric training program will last for 4 weeks, with three sessions per week. The plyometric exercises will be performed immediately after a warm-up. The program will incorporate bilateral, unilateral, acyclic, cyclic, horizontal, vertical, lateral, and diagonal movements involving both slow and fast movements. Each session will include 4-5 plyometric exercises, with 2-10 sets per exercise and 1-10 repetitions per set. The training volume will progressively increase from the 1st to the 2nd week and then the intensity will increase while the volume decreases from the 3rd to the 4th week in both intervention groups. However, the final volume will vary by 50% between the groups.<br>|
| Experimental: Reduced Volume Training Group<br>Participants in this group will undergo a plyometric training protocol at a lower volume than the Volume Training Group, aiming to determine if a lower volume still leads to significant improvements in lower limb strength, power, and muscle activity. | Other: plyometric training protocol<br>* The plyometric training program will last for 4 weeks, with three sessions per week. The plyometric exercises will be performed immediately after a warm-up. The program will incorporate bilateral, unilateral, acyclic, cyclic, horizontal, vertical, lateral, and diagonal movements involving both slow and fast movements. Each session will include 4-5 plyometric exercises, with 2-10 sets per exercise and 1-10 repetitions per set. The training volume will progressively increase from the 1st to the 2nd week and then the intensity will increase while the volume decreases from the 3rd to the 4th week in both intervention groups. However, the final volume will vary by 50% between the groups.<br>|
| No Intervention: Control Group<br>Participants in this group will not undergo any plyometric training and will serve as a comparison to assess the natural progression of lower limb strength, power, and muscle activity without intervention. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change from baseline muscle strength at 4 weeks | level of lower limb muscle strength during an instrumented sit to stand test | Baseline (pre-intervention), and two days after the last training session | 
| Change from baseline muscle power at 4 weeks | level of lower limb muscle power during an instrumented sit to stand test | Baseline (pre-intervention), and two days after the last training session | 
| Change from baseline muscle activity at 4 weeks | level of lower limb electromyographic activity during an instrumented sit to stand test | Baseline (pre-intervention), and two days after the last training session | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Plyometric exercise, Lower extremity, Sedentary behavior, Muscle strength, Electromyography