Acute explosive performance and fatigue-related responses to weighted jump-squat exercise in healthy resistance-trained men Other
Conditions
Interventions
This was a randomized, counterbalanced, three-condition crossover study. Participants first completed one familiarization session and subsequently completed three experimental trials separated by 72 h
Sponsors
Fuzhou University
Eligibility
Sex/Gender
Male
Age
18 Years to 25 Years
Inclusion criteria
Inclusion criteria: 1. Healthy male participants within the specified age range 2. At least 2 years of resistance-training experience 3. Participation in resistance training at least twice per week 4. Regular lower-limb resistance training during the previous 6 months 5. A back-squat one-repetition maximum of at least 1.5 times body mass 6. Willingness to provide written informed consent and complete the study procedures
Exclusion criteria
Exclusion criteria: 1. Lower-limb injury or pain during the previous 6 months 2. Neurological, cardiovascular, or metabolic disorders 3. Recent interruption of regular resistance training 4. Current use of supplements or medications that could affect exercise performance or fatigue-related responses
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Vertical jump height measured using flight time during countermovement jumps performed on a Kistler 9286BA force platform sampling at 1000 Hz, at baseline, immediately after each weighted jump-squat protocol (0 minutes), and 4, 8, and 12 minutes post-exercise | — |
Secondary
| Measure | Time frame |
|---|---|
| Relative peak power output measured using the Kistler 9286BA force platform during countermovement jumps and normalized to body mass, at baseline, immediately after each weighted jump-squat protocol (0 minutes), and 4, 8, and 12 minutes post-exercise;Reactive strength index-modified measured using vertical jump height divided by time to take-off during countermovement jumps at baseline, immediately after each weighted jump-squat protocol (0 minutes), and 4, 8, and 12 minutes post-exercise;Capillary blood lactate concentration, expressed in mmol·L?¹, measured using a 0.7-µL earlobe blood sample using a Lactate Plus analyzer at baseline, immediately after each weighted jump-squat protocol (0 minutes), and 4, 8, and 12 minutes post-exercise;Rating of perceived exertion measured using the Borg category-ratio 10 scale at immediately after each weighted jump-squat protocol (0 minutes), and 4, 8, and 12 minutes post-exercise;Updated 14/07/2026, previous version: 4. Rating of perceived exertion measured using the Borg category-ratio 10 scale at baseline, immediately after each weighted jump-squat protocol (0 minutes), and 4, 8, and 12 minutes post-exercise | — |
Countries
China
Contacts
Public ContactJiehong Wu
Outcome results
None listed