Contrast Training, Post-activation Countermovement Jump Performance in High Strength Male

The Effects of Three Contrast Training Sessions in a Week on Post-activation Countermovement Jump Performance in High Strength Male

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

Study Overview

• Status: Completed
• Conditions: Resistance Training
• Intervention / Treatment: Behavioral: Contrast training

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.

• Study Type: Interventional
• Enrollment (Actual): 21
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Taiwan
  • Taoyuan, Taiwan, 33301
    • National Taiwan Sport University

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: Yes

Description

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

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Contrast training sessions; Participants will perform three contrast training sessions for a week.	Behavioral: Contrast training; Three sets of three repetitions of parallel squats at 90% of 1RM

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
post-activation performance enhancement (PAPE)	PAPE will be evaluated by maximum height of countermovement jump in this study.	Change in baseline and 1, 3, 5, 7, 9, and 11 minutes after each squat set.
Within-group neuromuscular fatigue	Within-group neuromuscular fatigue will be evaluated by velocity loss rate calculated from maximum and minimum concentric mean velocities of each set for squat in this study.	Up to 2 weeks.
Between-group neuromuscular fatigue	Between-group neuromuscular fatigue will be evaluated by the fastest mean concentric velocity of each squat set in this study.	Up to 2 weeks.
Between-day squat performance	Between-day squat performance will be evaluated by the fastest mean concentric velocity of first squat set for each contrast training in this study.	Up to 2 weeks.
Delayed potentiation of neuromuscular performance (DPNP)	DPNP will be evaluated by maximum height of countermovement jump in this study.	Up to 2 weeks.

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Weight	Weight in kilograms.	Baseline
Height in meters	Height in meters.	Baseline
Body fat	The body weight and fat weight will be combined to calculate the body fat in percentage.	Baseline
Squat 1RM	Squat 1RM will be evaluated maximum weight lifted for 1 repetition of squat in this study.	Baseline
Concentric mean force of squat	Concentric mean force in newtons.	Up to 2 weeks.
Concentric peak force of squat	concentric peak force in newtons.	Up to 2 weeks.
Concentric mean velocity of squat	Concentric mean velocity in meters per second.	Up to 2 weeks.
Concentric mean velocity loss of squat	Concentric mean velocity loss in percentage.	Up to 2 weeks.
Concentric peak velocity of squat	Concentric mean velocity in meters per second.	Up to 2 weeks.
Concentric mean power of squat	concentric mean velocity in watts.	Up to 2 weeks.
Concentric peak power of squat	Concentric peak power in watts.	Up to 2 weeks.
Concentric rep duration of squat	Concentric rep duration in scend.	Up to 2 weeks.
Dip of squat	Dip in meters.	Up to 2 weeks.
Eccentric min velocity of squat	Eccentric min velocity in meters per second.	Up to 2 weeks.
Eccentric peak velocity of squat	Eccentric peak velocity in meters per second.	Up to 2 weeks.
Eccentric peak force of squat	Eccentric peak force in newtons.	Up to 2 weeks.
Vertical distance of squat	Vertical distance in meters.	Up to 2 weeks.

Collaborators and Investigators

• Sponsor: National Taiwan Sport University
• Investigators: Study Director: Tzai-Li Li, Phd, National Taiwan Sport University

Study record dates

Study Major Dates

• Study Start (Actual): September 4, 2023
• Primary Completion (Actual): January 26, 2024
• Study Completion (Actual): January 26, 2024

Study Registration Dates

• First Submitted: July 23, 2023
• First Submitted That Met QC Criteria: August 3, 2023
• First Posted (Actual): August 14, 2023

Study Record Updates

• Last Update Posted (Actual): April 9, 2024
• Last Update Submitted That Met QC Criteria: April 7, 2024
• Last Verified: April 1, 2024

More Information

Terms related to this study

• Other Study ID Numbers: NationalTaiwanSportU

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No