Clinical trial NCT05987046: Contrast Training, Post-activation Countermovement Jump Performance in High Strength Male
Official title: The Effects of Three Contrast Training Sessions in a Week on Post-activation Countermovement Jump Performance in High Strength Male
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Resistance Training
Lead sponsor: National Taiwan Sport University
Sponsor class: OTHER
First posted: 2023-08-14
Enrollment: 21
Sex: MALE
Minimum age (years): 18
Maximum age (years): 30
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: The study investigated the effects of three contrast training sessions in a week on post-activation countermovement jump performance in high strength male.

Detailed description: Previous researches indicated that the primary contributor of contrast training to improving explosive performance might be the phenomenon of post-activation performance enhancement (PAPE), with emphasis on conducting plyometric training at the optimal PAPE time. However, the PAPE appeared to be susceptible to fatigue and delayed potentiation of neuromuscular performance. Thus, its applicability in practical training is not yet clarified. The purposes of this study are to: 1) examine the effects of three contrast training sessions in a week on individual and group's PAPE and the optimal timepoint of PAPE; 2) assess the intrasession and intersession reliability of the optimal PAPE timepoints of both individuals and groups; 3) determine the relationship between kinematic parameters during resistance training and PAPE.

Qualified participants will visit the laboratory five times for experimental familiarization, One repetition maximum (1RM) of parallel squat test, and three contrast training sessions, with each contrast training session consisting of three sets of parallel squats in a week. Alongside this, countermovement jump tests will be conducted before the first set of squats and at 1, 3, 5, 7, 9, and 11 minutes after each squat set, with the kinematic parameters of the parallel squats also being collected.

Eligibility criteria: Inclusion Criteria:

* Least 2 years of resistance training experience.
* Least 1.75 times body weight of squat 1RM
* Currently engaged in regular exercise training.

Exclusion Criteria:

* Skeletal muscle injury within the past six months.
* Non-responders to PAPE

Primary outcomes:
measure: post-activation performance enhancement (PAPE)
timeFrame: Change in baseline and 1, 3, 5, 7, 9, and 11 minutes after each squat set.
measure: Within-group neuromuscular fatigue
timeFrame: Up to 2 weeks.
measure: Between-group neuromuscular fatigue
timeFrame: Up to 2 weeks.
measure: Between-day squat performance
timeFrame: Up to 2 weeks.
measure: Delayed potentiation of neuromuscular performance (DPNP)
timeFrame: Up to 2 weeks.
Secondary outcomes:
measure: Weight
timeFrame: Baseline
measure: Height in meters
timeFrame: Baseline
measure: Body fat
timeFrame: Baseline
measure: Squat 1RM
timeFrame: Baseline
measure: Concentric mean force of squat
timeFrame: Up to 2 weeks.
measure: Concentric peak force of squat
timeFrame: Up to 2 weeks.
measure: Concentric mean velocity of squat
timeFrame: Up to 2 weeks.
measure: Concentric mean velocity loss of squat
timeFrame: Up to 2 weeks.
measure: Concentric peak velocity of squat
timeFrame: Up to 2 weeks.
measure: Concentric mean power of squat
timeFrame: Up to 2 weeks.
measure: Concentric peak power of squat
timeFrame: Up to 2 weeks.
measure: Concentric rep duration of squat
timeFrame: Up to 2 weeks.
measure: Dip of squat
timeFrame: Up to 2 weeks.
measure: Eccentric min velocity of squat
timeFrame: Up to 2 weeks.
measure: Eccentric peak velocity of squat
timeFrame: Up to 2 weeks.
measure: Eccentric peak force of squat
timeFrame: Up to 2 weeks.
measure: Vertical distance of squat
timeFrame: Up to 2 weeks.
Other outcomes:
Locations:
city: Taoyuan
country: Taiwan
facility: National Taiwan Sport University
Study officials:
affiliation: National Taiwan Sport University
name: Tzai-Li Li, Phd
role: STUDY_DIRECTOR
References: