Hamstring injuries represent one of the most frequent muscle injuries not only in the NFL but also in other explosive sports, such as sprint. Hamstring injuries usually occur during full-speed sprinting or when some other force overstretches one or more hamstring muscles. They are especially frequent when the athletes do not perform a proper warm up prior to the activity or because of an overuse.
Hamstring injuries are problematic as it is very difficult to fully rest hamstrings and furthermore they require long-term rehabilitation. Consequently, many athletes continue with their training routine regardless of the fact that their hamstrings have strains, which leads to an even worse injury. Once a hamstring muscle is injured, a re-injury is very likely to happen if the rehabilitation is not sufficient and a special training protocol is not implemented.

Tensiomyography (TMG) is a noninvasive means of evaluating a muscle’s ability to contract/relax. By examining the contractile profile of a muscle group, TMG provides individualized data on muscle symmetry and firing velocities. The information obtained is used to evaluate and optimize the training or rehabilitation process and helps coaches to prevent hamstring injuries and optimize the rehabilitation process.

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