What are we aiming for in eccentric hamstring training: Angle-specific control or supramaximal stimulus?

Different resistance exercise determinants modulate the musculo-tendinous adaptations following eccentric hamstring training. The Nordic Hamstring Exercise (NHE) can be performed twofold: the movement velocity irreversibly increases towards the end of the range of motion or it is kept constant. This cross-sectional study examined the kinetic and kinematic differences between increasing (vinc) and constant velocity (vcon) NHE execution by analysing the downward acceleration angle (DWAangle) in relation to the angle of peak moment (APM). A total of 613 unassisted NHE repetitions of twelve male sprinters (22 years, 181 cm, 76 kg) were analysed. The majority of analysed parameters demonstrated large effects. NHEs with vcon revealed significantly higher impulses (p