Sprinting

Sprinting is the most demanding short-duration activity for the posterior chain — glutes, hamstrings, and calves fire at maximum voluntary contraction rates from a standing start. We believe sprinting without a dedicated warm-up is the most reliable way to pull a hamstring, and the evidence backs it up: hamstring strains peak in the first sprint of any session, on cold tissue. Our audio sessions are structured in three phases: joint mobility, progressive activation building from glute bridges to high-knee marching, and a full sprint ramping protocol that takes you from 60% to 100% over six progressively faster runs.

Testers who sprint as part of athletic training told us our sessions reduced the psychological hesitation they felt before the first all-out effort of the day — the one where the risk of pulling something felt highest.

After three weeks of consistent warm-up sessions, several reported hitting max speed earlier in training without the muscle anxiety that had previously accompanied first-sprint efforts. Preparation changes what feels safe — and what feels safe changes what you do.