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Objective:

Hamstring injuries can be quite debilitating and often result in chronic problems. Eccentric muscle actions are often the last line of defense against muscle injury and ligament disruption. Traditionally, the focus of hamstring strength rehabilitation has been on concentric muscle actions. The purpose of our study was to compare hamstring muscle strength gains in concentric and eccentric hamstring strength training.

Design and Setting:

A randomized-group design was used to examine differences in 1-repetition maximum (1 RM) and isokinetic strength values among 3 groups of subjects. Subjects were tested in a biomechanics laboratory using an isokinetic dynamometer, while training was carried out in a physical therapy outpatient clinic.

Subjects:

Twenty-seven healthy male subjects (age= 22.9±3.1 years, wt= 81.8±12.9 kg, ht= 178.6±7.2 cm) participated in this study. Subjects were randomly assigned to 1 of …