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

Not Applicable

Completed

• Conditions: Resistance Training
• Interventions: Other: Dominant Limb Overcoming Isometric Conditioning Activity; Other: Non-dominant Limb Overcoming Isometric Conditioning Activity

• Registration Number: NCT06459050
• Lead Sponsor: The Jerzy Kukuczka Academy of Physical Education in Katowice

Brief Summary

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.

Detailed Description

Not available

Study Timeline

• Study Start: 2023-04-02
• Primary Completion: 2023-06-05
• Study Completion: 2023-07-03
• Status Verified: 2024-06
• Study First Submitted: 2024-06-10
• Study First Submitted QC: 2024-06-10
• Last Update Submitted: 2024-06-10
• Study First Posted: 2024-06-14
• Last Update Posted: 2024-06-14

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Male
• Target Recruitment: 20

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.

Exclusion Criteria

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
Dominant Limb Conditioning Activity	Dominant Limb Overcoming Isometric Conditioning Activity	Each participant performed a single-leg drop jump for both the dominant and non-dominant limbs before and after completing the CA.
Non-dominant Limb Conditioning Activity	Non-dominant Limb Overcoming Isometric 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.

Primary Outcome Measures

Name	Time	Method
Drop Jump Height	Immediately pre- and at 4th and 8th minute post-completion of conditioning activity.	Drop jump height estimated via take-off velocity performed on force plates. Participants performed 2 trials at each time-point.
Drop Jump Contact Time	Immediately pre- and at 4th and 8th minute post-completion of conditioning activity.	Drop jump contact time was estimated via time spent on the ground between drop and jump transition performed on force plates. Participants performed 2 trials at each time-point.
Drop Jump Reactive Strength Index	Immediately pre- and at 4th and 8th minute post-completion of conditioning activity.	Drop jump reactive strength index was estimated via jump height divided by the contact time performed on force plates. Participants performed 2 trials at each time-point.

Trial Locations

Locations (1)

The Jerzy Kukuczka Academy of Physcial Education in Katowice; 🇵🇱 Katowice, Slask, Poland