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

NCT06459050 | Completed

• 1 other identifier: PRIMUS 22/HUM/019
• Study Type: interventional
• Target: 20
• Locations: 1 country
• Sites: 1

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.

Conditions

Resistance Training

Keywords

resistance training; strength and conditioning; physical activity; athletic performance

Outcome Measures

Primary Outcomes (3)

• Drop Jump Height

  Drop jump height estimated via take-off velocity performed on force plates. Participants performed 2 trials at each time-point.

  Immediately pre- and at 4th and 8th minute post-completion of conditioning activity.

• Drop Jump Contact Time

  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.

  Immediately pre- and at 4th and 8th minute post-completion of conditioning activity.

• Drop Jump Reactive Strength Index

  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.

  Immediately pre- and at 4th and 8th minute post-completion of conditioning activity.

Study Arms (2)

Dominant Limb Conditioning Activity

EXPERIMENTAL

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

Other: Dominant Limb Overcoming Isometric Conditioning Activity

Non-dominant Limb Conditioning Activity

EXPERIMENTAL

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

Other: Non-dominant Limb Overcoming Isometric Conditioning Activity

Interventions

Dominant Limb Overcoming Isometric Conditioning Activity 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.

Dominant Limb Conditioning Activity

Non-dominant Limb Overcoming Isometric Conditioning Activity 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.

Non-dominant Limb Conditioning Activity

Eligibility Criteria

• Age: 18 Years - 35 Years
• Sex: male
• Healthy Volunteers: No
• Age Groups: Adult (18-64)

You may qualify if:

• 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.

Sponsors & Collaborators

• The Jerzy Kukuczka Academy of Physical Education in Katowice: lead
• Charles University, Czech Republic: collaborator
• University School of Physical Education, Krakow, Poland: collaborator

Study Sites (1)

The Jerzy Kukuczka Academy of Physcial Education in Katowice

Katowice, Silesian Voivodeship, 40-065, Poland

Location

Related Publications (1)

• Terbalyan A, Mikolajec K, Krzysztofik M, Urbanski R, Jarosz J, Stastny P, Spieszny M. Effects of overcoming isometric unilateral conditioning activity on subsequent single-leg drop jump in elite and amateur volleyball players: a randomized crossover trial. BMC Sports Sci Med Rehabil. 2025 Feb 28;17(1):30. doi: 10.1186/s13102-025-01083-9.

  PMID: 40022177 DERIVED

MeSH Terms

Conditions

Motor Activity

Condition Hierarchy (Ancestors)

Behavior

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NON RANDOMIZED
• Masking: DOUBLE
• Who Masked: PARTICIPANT, OUTCOMES ASSESSOR
• Purpose: TREATMENT
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: PhD

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

Study Record Dates

• First Submitted: June 10, 2024
• First Posted: June 14, 2024
• Study Start: April 2, 2023
• Primary Completion: June 5, 2023
• Study Completion: July 3, 2023
• Last Updated: June 14, 2024

Record last verified: 2024-06

Locations

PL (1)