Top Episode Replay: Go Hard to Go Fast - New Age Sprint Training - With Prof. Dr. JB Morin & Dr Martin Buchheit

Feb 27, 2026

Prof. Dr. JB Morin, a sprint mechanics researcher and sports science director, dives into sprint force–velocity profiling and tailored speed training. He breaks down horizontal force focus, sprint-specific resisted training, and practical testing for individual speed profiles. Expect clear takes on programming heavy resisted sprints and using profiles to target the remaining 30% of sprint gains.

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ANECDOTE

Rugby Sevens Player Strong In Gym But Weak In Sprint

On the French rugby sevens team they found a player with huge gym strength but very low horizontal sprint force, revealing poor force orientation/transmission.
That case led them to use horizontal-specific resisted sprints and technical work to improve transfer.

ADVICE

Measure Both Sprint F0 And Non Sprint Strength

To understand whether low sprint horizontal F0 is technique or motor capacity, measure both sprint F0 and a non-sprint vertical F0 or 1RM (e.g., half squat).
Compare metrics separately rather than a single ratio to identify transmission or orientation issues.

ADVICE

Test Near Extremes To Accurately Estimate Max

You cannot reliably extrapolate true maxima from testing only mid-range loads; to assess max capacity you must test near the extremes.
Morin: testing away from the max (e.g., only 60–100 kg hexbar speeds) yields risky extrapolations and may hide big individual differences.

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