Jade WuPhD, DBSM · behavioural sleep medicine psychologist
Yes; even moderate-to-vigorous work within two hours of bed is fine, and the old rule is debunked
What it rests onA large real-world study of over 12,000 people in which evening exercisers slept slightly better; and her stated objection to adding arbitrary restrictions
Source: drjadewu.com ↗
Matthew WalkerPhD · neuroscientist
Evening is fine, but finish more than an hour, ideally ninety minutes, before bed
What it rests onTrial data showing benefit at two to three and a half hours before bed, no harm at ninety minutes, and reduced sleep and efficiency at sixty minutes
Source: themattwalkerpodcast.buzzsprout.com ↗
Both sides address general adults, and both experts allow personal observation to override the rule.
Both have retired the old no-evening-exercise advice, Walker explicitly as a reversal of his own. The residual disagreement is roughly one hour of buffer, which makes it a small, honest, live disagreement.
Trials of vigorous exercise finishing inside the final hour before bed with objective sleep measurement.
You do, and your call is dated, kept, and yours to change. Follow the people you already trust and what they publish turns into a short daily practice.
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