Author : Zach Hart
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Book Synopsis The Effects of a Single Supramaximal Eccentric Contraction on Maximal Concentric Strength by : Zach Hart
Download or read book The Effects of a Single Supramaximal Eccentric Contraction on Maximal Concentric Strength written by Zach Hart and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to analyze and determine the effects on muscular strength, endurance, and hypertrophy of a single supramaximal eccentric contraction and submaximal concentric contraction after conventional resistance training. In this study, 2 male collegiate football athletes completed four weeks of strength training on the bench press. Training was conducted 3 times per week with 1RM testing and chest circumference measurements done before training, after two weeks of training, and after four weeks of training. The independent variables were the types of contractions being performed after the strength training- eccentric or concentric. The dependent variables were performance in the 1RM bench press, ACSM push-up test, and change in chest circumference. The bench press is an exercise that is an excellent measure of upper body strength; it’s utilized in almost every recreational lifting program and used as a measure of performance for the NFL combine and power lifting competitions. The ACSM push-up test is a test that measures upper body muscular endurance and is used to assess general health in a wide range of age groups and populations. The chest circumference measurements were used to measure muscular hypertrophy as the course of training progressed. The sessions were completed with both subjects lifting together and competing to improve 1RM the most from baseline and improve amount of push-ups done from baseline. It was hypothesized that performing a supramaximal eccentric contraction after conventional strength training on the bench press would yield higher percentage increases on the 1RM, number of push-ups performed from baseline, and muscular hypertrophy from baseline. Pilot data suggested that the hypotheses made were true. Data concluded that (1) the concentric group experienced a greater increase of strength than the eccentric group after two weeks of training (6.6% compared to 5.45% from baseline); while the eccentric group experienced a greater increase in strength than the concentric group after four weeks of training (12.72% compared to 10% from baseline), (2) the eccentric group yielded a higher percent increase in push-up repetitions after two and four weeks of training (31.43% at 2 weeks and 37.14% at 4 weeks), (3) the concentric group displayed a greater increase in chest circumference and hypertrophy after two weeks and four weeks of training (2.09% at 2 weeks and 2.70% at 4 weeks).
