Effects of Eccentric Potentiation Activation on Muscle Function

Brennan Thompson

Overview

The purpose of this study is to examine the potentiation effects of 2 sets of multi-joint eccentric overload maximal contractions on muscle function.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

OTHER

Masking

SINGLE

Conditions

Post Activation Potentiation

Interventions

Eccentric ExerciseOTHER

Individuals will do a randomized crossover intervention involving maximal eccentric contractions (2 sets of 6 per leg; experimental condition)

Cycle ergometerOTHER

Individuals will do a randomized crossover intervention involving cycling (active control) exercise

Eligibility

Sex: ALLMin age: 18 YearsMax age: 30 YearsHealthy volunteers:

Medical Language ↔ Plain English

Exclusion Criteria: * lower body surgery or injury in the last 12 months * have any neuromuscular disease * height \>76 inches tall * height \<54 inches tall * eccentric strength greater than 725 pounds * pregnant or plan to be pregnant in the duration of the protocol * don't do resistance exercise at least once per week * perform intense cardio or strength training \>4 days per week * Present with any other significant comorbid conditions that would impair the ability to participate in the exercise-based testing Inclusion criteria: * 18 - 30 years old * strength train lower body 1-3 times per week

Locations (1)

Utah State University

Logan, Utah, United States

Outcomes

Primary Outcomes

Vertical Jump

3 countermovement vertical jumps, with 30 seconds of rest between attempts

Time frame: Baseline (pretest)

Vertical Jump

3 countermovement vertical jumps, with 30 seconds of rest between attempts

Time frame: Immediately post intervention

Vertical Jump

3 countermovement vertical jumps, with 30 seconds of rest between attempts

Time frame: 12 minutes post intervention

Vertical Jump

3 countermovement vertical jumps, with 30 seconds of rest between attempts

Time frame: 20 minutes post intervention

Isokinetic eccentric maximal strength

Maximal eccentric strength on the Eccentron machine. 2 repetitions per time point

Time frame: Baseline (pretest)

Isokinetic eccentric maximal strength

Maximal eccentric strength on the Eccentron machine. 2 repetitions per time point

Time frame: Immediately post intervention

Isokinetic eccentric maximal strength

Maximal eccentric strength on the Eccentron machine. 2 repetitions per time point

Time frame: 12 minutes post intervention

Isokinetic eccentric maximal strength

Maximal eccentric strength on the Eccentron machine. 2 repetitions per time point

Time frame: 20 minutes post intervention

Data from ClinicalTrials.gov

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