Effects of Isometric Conditioning Activity on Subsequent Jumping Performance in Volleyball Players

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

20 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-04-02

Study Completion Date

2023-07-03

Brief Summary

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The pairing of high-effort exercise, called conditioning activity, with a biomechanically similar high-velocity power movement is considered a valid method to effectively facilitate muscle power adaptations. Research has mainly focused on using this method in exercises performed by both limbs, even though sports tasks are often executed through motion sequences produced by a single limb alternately. However, available studies have focused solely on the dominant leg, leaving it unclear if the effectiveness is similar in both legs and how it transfers between them. Therefore, this study aims to evaluate the immediate effects of the isometric split squat exercise on single-leg drop jump performance in volleyball players, considering their training status.

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Detailed Description

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Conditions

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Resistance Training

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

CROSSOVER

The study was performed following a randomized, double-blind crossover design, where each participant performed two experimental sessions.

Primary Study Purpose

TREATMENT

Blinding Strategy

DOUBLE

Participants Outcome Assessors

Study Groups

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Dominant Limb Conditioning Activity

Each participant performed a single-leg drop jump for both the dominant and non-dominant limbs before and after completing the CA.

Group Type EXPERIMENTAL

Dominant Limb Overcoming Isometric Conditioning Activity

Intervention Type OTHER

Each session involved performing 3 sets of 3-second overcoming isometric split squats with a 3-minute rest between sets as a conditioning activity performed by the dominant limb.

Non-dominant Limb Conditioning Activity

Each participant performed a single-leg drop jump for both the non-dominant and non-dominant limbs before and after completing the CA.

Group Type EXPERIMENTAL

Non-dominant Limb Overcoming Isometric Conditioning Activity

Intervention Type OTHER

Each session involved performing 3 sets of 3-second overcoming isometric split squats with a 3-minute rest between sets as a conditioning activity performed by non-dominant limb.

Interventions

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Dominant Limb Overcoming Isometric Conditioning Activity

Each session involved performing 3 sets of 3-second overcoming isometric split squats with a 3-minute rest between sets as a conditioning activity performed by the dominant limb.

Intervention Type OTHER

Non-dominant Limb Overcoming Isometric Conditioning Activity

Each session involved performing 3 sets of 3-second overcoming isometric split squats with a 3-minute rest between sets as a conditioning activity performed by non-dominant limb.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* no lower-limb serious injury, including tendon or muscle tear,
* participation in regular resistance training and competition.
* for the elite group participants competed at the highest national volleyball league for at least two consecutive seasons.
* for the amateur group participants competed in junior groups outside the highest league level.