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

Resistance Training Clinical Trial

Official title:

Effects of Overcoming Isometric Unilateral Conditioning Activity on Subsequent Single-Leg Drop Jump in Elite and Amateur Volleyball Players

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT06459050
• Other study ID #: PRIMUS 22/HUM/019
• Status: Completed
• Phase: N/A
• Start date: April 2, 2023
• Est. completion date: July 3, 2023

Study information

• Verified date: June 2024
• Source: The Jerzy Kukuczka Academy of Physical Education in Katowice
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial 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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 20
• Est. completion date: July 3, 2023
• Est. primary completion date: June 5, 2023
• Accepts healthy volunteers: No
• Gender: Male
• Age group: 18 Years to 35 Years

Eligibility

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:

-

Related Conditions & MeSH terms

• Resistance Training

Intervention

Other:
• 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.
• 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.

Locations

Country	Name	City	State
Poland	The Jerzy Kukuczka Academy of Physcial Education in Katowice	Katowice	Slask

Sponsors (3)

Lead Sponsor	Collaborator
The Jerzy Kukuczka Academy of Physical Education in Katowice	Charles University, Czech Republic, University School of Physical Education, Krakow, Poland

Country where clinical trial is conducted

Poland, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	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.
Primary	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.
Primary	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.