Quick Read: Aerobic Training and Sprints

Tempo

Purists be damned. Sprinters need an aerobic base. I learned this lesson the hard way.

Sprints are alactic and glycolytic events. No energy system works in isolation. The aerobic system underwrites the others — ATP resynthesis, recovery between reps, recovery between sessions. Ignore it and the work above it suffers.

This is why extensive tempo lives on every low-CNS day, year-round. Not seasonal. Architectural. Charlie Francis built his career on the high/low split, and the low side wasn't filler.

A trained aerobic system produces more ATP over a longer window. Sustained high-intensity output gets cheaper. The 200 and 400 runners should already be paying attention, but short sprinters can't ignore this fact either. Recovery improves between reps, sets, and sessions. Better recovery, better training quality. Better training quality, over time, better performance.

The Work

Thirty minutes in the aerobic zone. For most athletes that's 130–160 bpm, age-adjusted. Run it as a block or break it up — 2x15 minutes, 3x10 minutes, whatever fits the day.

Sprint distances work too. 200m at 50 - 70% effort. Watch the heart rate. When it drops to the low end of the zone, go again. Keep it inside the extensive tempo bracket — 70% target, 75% ceiling. The dead zone above that (75–90%) stays off the menu. Too fast to recover. Too slow to adapt.

This version travels well into the season. Specificity stays intact. The same intervals progress into lactic work as the calendar advances. Long slow distance can't do that.

Train the system that supports the system. Then run fast.