Differences between concentric and eccentric resistance exercise in increasing muscle mass and strength

• Main Author: Lee, Daniel John
• Other Authors: Dianna Thor
• Format: Final Year Project
• Language: English
• Published: 2016
• Subjects: DRNTU::Engineering::Computer science and engineering::Computer applications::Life and medical sciences
• Online Access: http://hdl.handle.net/10356/66921
• Institution: Nanyang Technological University

Background: Training intensity and physiological overload are factors affecting maximal strength. As eccentric contraction producing higher peak forces than concentric contraction, it is hypothesized that a stronger strength and hypertrophy adaptations will result with eccentric training. Purpose: The purpose of this study is to ascertain the effects of eccentric resistance training on improving maximal concentric strength and muscle hypertrophy. Methods: 15 male university students participated in a randomized, non-crossover experimental study consisting of pre and post-testing of their MVC performance, 1RM and muscle CSA. Subjects were split into concentric and eccentric groups, and a control group. The concentric and eccentric group underwent a 6 week training protocol while the control group abstained from lower body resistance training during that duration. Results: There were no significant differences between eccentric and concentric groups in improving MVC performance (p=0.501), 1RM strength (p=0.407), and muscle CSA (p=0.244). Test specificity was observed, there were greater improvements in 1RM strength from the concentric group compared to the eccentric group. However, the eccentric group fared better in MVC performance and muscle CSA improvements. Conclusion: Eccentric resistance training does not significantly improve maximal concentric strength and muscle mass more than concentric resistance training.