drtbear1967
Musclechemistry Board Certified Member
The hamstrings are right around a 50-50 split between fast twitch and slow twitch muscle fibers. This means that a wide variety of repetition and rest period ranges should be used to train the hamstrings. In addition, remember to include BOTH knee flexion-based and hip extension-based hamstrings exercises in your program for optimal hamstrings development.
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Source: Evangelidis, P. E., Massey, G. J., Ferguson, R. A., Wheeler, P. C., Pain, M. T., & Folland, J. P. (2017). The functional significance of hamstrings composition: is it really a “fast” muscle group? Scandinavian Journal of Medicine & Science in Sports, 27(11), 1181-1189.
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Source: Evangelidis, P. E., Massey, G. J., Ferguson, R. A., Wheeler, P. C., Pain, M. T., & Folland, J. P. (2017). The functional significance of hamstrings composition: is it really a “fast” muscle group? Scandinavian Journal of Medicine & Science in Sports, 27(11), 1181-1189.