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

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

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.

Study Overview

• Status: Completed
• Conditions: Sedentary Behavior; Plyometric Exercise
• Intervention / Treatment: Other: plyometric training protocol

• Study Type: Interventional
• Enrollment (Actual): 60
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Chile
  • Valdivia, Chile, 50900000
    • Universidad San Sebastián, sede Valdivia.

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: Yes

Description

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).

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Prevention
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Double

Number of Arms

3

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Volume Training Group; 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; 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.
Experimental: Reduced Volume Training Group; 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; 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.
No Intervention: Control Group; 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?

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

Collaborators and Investigators

• Sponsor: Rodrigo Lizama Perez

Study record dates

Study Major Dates

• Study Start (Actual): July 30, 2023
• Primary Completion (Actual): January 30, 2024
• Study Completion (Actual): February 20, 2024

Study Registration Dates

• First Submitted: May 16, 2023
• First Submitted That Met QC Criteria: June 22, 2023
• First Posted (Actual): July 3, 2023

Study Record Updates

• Last Update Posted (Actual): March 12, 2024
• Last Update Submitted That Met QC Criteria: March 8, 2024
• Last Verified: March 1, 2024

More Information

Terms related to this study

• Keywords: Plyometric exercise; Electromyography; Muscle strength; Lower extremity; Sedentary behavior
• Other Study ID Numbers: IDAFISAD 64202

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No