Each week, I ask a question about a common running science myth. Answer correctly and you'll be entered into the weekly raffle.
Research comparing one long "threshold-style" interval session vs the same work split into two sessions (AM/PM) shows the main advantage of a double-threshold day is what?
Tap your answer to lock it in.
A. Lower HR/lactate/RPE drift per session, letting you accumulate more weekly “controlled” threshold volume 🧪📉
B. Higher VO₂max stimulus, because two sessions give you two chances to hit max oxygen uptake 🫁⚡
C. Better glycogen-depletion signaling, because the second session is always “train low” 🧠🍤
D. A bigger total stress response, because frequency matters more than duration for endurance adaptation 🔥🔁
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