Negative split planner — race pacing strategy

Plan a race where the second half is faster than the first. Reduces the risk of the wall and produces better finishing times in 80% of marathons (Bruce, 2018).

Tiempo objetivo (hh:mm:ss) Distancia (km)

Split % (2a mitad mas rapida)

Calculate

Negative split works because it conserves glycogen in the first half — you're metabolizing fat instead of burning fast fuel. The key is having the discipline to go slow when everyone goes out fast.