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trackhead
RE: Mr. Renato Canova: Could You Please Answer a Question About Effective Ways to Improve the Lactate Threshold?
because the 50/50 use is the INSTANTANEOUS usage.

The 400m is 30% aerobic because the first part is so shifted anaerobically. The same reason why the 800m (mind you these are pretty fast guys) is 57% aerobic, despite the fact that at 90s, you're instantaneous energy use is ~90% aerobic.

That's why you see so many athletes with poor endurance go backwards in the last 200m -- they have poorly developed that energy system. We've all seen it. Or in the 400m, in the last 150m.

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