The purpose of this investigation was to examine the effect of an 8-week training program with heavy- vs. light-load jump squats on various physical performance measures and electromyography (EMG). Twenty-six athletic men with varying levels of resist ...

The purpose of this investigation was to examine the effect of an 8-week training program with heavy- vs. light-load jump squats on various physical performance measures and electromyography (EMG). Twenty-six athletic men with varying levels of resistance training experience performed sessions of jump squats with either 30% (JS30, n = 9) or 80% (JS80, n = 10) of their one repetition maximum in the squat (1RM) or served as a control (C, n = 7). An agility test, 20-m sprint, and jump squats with 30% (30J), 55% (55J), and 80% (80J) of their 1RM were performed before and after training. Peak force, peak velocity (PV), peak power (PP), jump height, and average EMG (concentric phase) were calculated for the jumps. There were significant increases in PP and PV in the 30J, 55J, and 80J for the JS30 group (p <or= 0.05). The JS30 group also significantly increased in the 1RM with a trend towards improved 20-m sprint times. In contrast, the JS80 group significantly increased both PF and PP in the 55J and 80J and significantly increased in the 1RM but ran significantly slower in the 20-m sprint. In the 30J the JS30 group's percentage increase in EMG activity was significantly different from the C group. In the 80J the JS80 group's percentage increase in EMG activity was significantly different from the C group. This investigation indicates that training with light-load jump squats results in increased movement velocity capabilities and that velocity-specific changes in muscle activity may play a key role in this adaptation.

<출처: NCBI, https://www.ncbi.nlm.nih.gov/pubmed/11834109>

본 자료는 최종결과물(결과보고서)의 원자료이다.

본 연구는 저항운동 기간 동안 평소 식습관에서 탄수화물과 단백질 섭취비율을 조절한 식단이 신체조성에 어떠한 영향을 미치는지를 알아보았다. 이 때 저항운동 프로그램은 '저~고강도의 운동과 2~5세트 이 ...

본 자료는 최종결과물(결과보고서)의 원자료이다.

본 연구는 저항운동 기간 동안 평소 식습관에서 탄수화물과 단백질 섭취비율을 조절한 식단이 신체조성에 어떠한 영향을 미치는지를 알아보았다. 이 때 저항운동 프로그램은 '저~고강도의 운동과 2~5세트 이내와 2~10RM 범위의 저항운동이 최대근력의 증가를 가져온다'라는 본 자료의 보고를 통해 구성되었다.

ABSTRACT
Introduction
Methods
Subjects
Study Design
Training Protocol
1RM Testing
Jump-Squat Testing
Electromyography
Agility T-Test and 20-M Sprint
Body Composition
Statistical Analyses
Results ...

ABSTRACT
Introduction
Methods
Subjects
Study Design
Training Protocol
1RM Testing
Jump-Squat Testing
Electromyography
Agility T-Test and 20-M Sprint
Body Composition
Statistical Analyses
Results
Subject Characteristics
Training Protocol
Squat (1RM)
Jump Squats
Electromyography
Agility T-Test and 20-m Sprint
Discussion
Practical Applications
References
Acknowledgments