Latest / The Athlete's Compass
When to Perform High-Intensity Intervals
Should endurance athletes complete high-intensity intervals while fresh, or place them later in a workout after accumulating fatigue? Paul Warloski and Dr. Paul Laursen explain why the answer depends on the type of fatigue involved. General systemic or neuromuscular fatigue may be a reason to postpone intensity, while lower muscle-glycogen availability can amplify signals associated with mitochondrial development and fatigue resistance. The discussion covers AMPK, fat oxidation, fast-twitch muscle fibers, running mechanics, heat, race specificity, athlete type, training experience, and why…
The skinny
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