Different physical qualities stick around for different amounts of...
Fred Duncan@Fred__Duncan
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Sep 23, 2025
~1 min read
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Different physical qualities stick around for different amounts of time once you stop training them. This is a blend of Issurin and some updated findings, but as always, nothing is gospel.
Strength and aerobic capacity are relatively durable. Glycolytic and repeat-sprint
Strength and aerobic capacity are relatively durable. Glycolytic and repeat-sprint
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qualities fade faster. And speed? That’s the most fragile of all.
This is why planning matters. You don’t have to hammer everything all the time, but you do have to understand which qualities need frequent exposures to maintain and which can be touched less often. That’s how
This is why planning matters. You don’t have to hammer everything all the time, but you do have to understand which qualities need frequent exposures to maintain and which can be touched less often. That’s how
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you organize training for performance instead of just exercising.
If you want a system that walks you through exactly how to develop and maintain these qualities, with detailed explanations, warm-ups, resisted sprint progressions, plyometrics, strength programming, and
If you want a system that walks you through exactly how to develop and maintain these qualities, with detailed explanations, warm-ups, resisted sprint progressions, plyometrics, strength programming, and
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conditioning built around speed, grab Speed Kills. It’s my most complete breakdown of speed development and comes with an 8-week program to put it into practice.
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fredduncantraining.com/product/projec…
