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Even at 75% of max speed, hamstring activation can exceed max isometric levels. That’s how intense sprinting is. Submaximal runs…like 70–80% effort still provide massive hamstring stimulus while keeping fatigue lower. If you want to understand why sprinting builds what the
weight room can’t, that’s what Speed Kills breaks down. It covers mechanics, programming, resisted sprints, coaching cues, and how to structure your week for real speed development. For personalized help, I also offer custom remote programming and 1-on-1 phone consults
<a target="_blank" href="https://fredduncantraining.com/product/speed-kills/" color="blue">fredduncantraining.com/product/speed-…</a>
Everyone wants the “secret” to speed, but they skip over what actually matters…execution. Watch how Shelly-Ann Fraser-Price moves. There’s intent behind every drill. It’s not the complexity of the exercise that makes her great, it’s the precision. The best athletes understand
