Daily briefing: Exercise rewires the brain for endurance, in mice

Nature

by Flora Graham

February 17, 2026

Exercise might pump up our neurons as well as our muscles. Plus, the source of a rare side effect of some COVID vaccines and the ‘phantom pain’ that can be felt when biodiversity is lost. Exercise might pump up our neurons as well as our muscles. Plus, the source of a rare side effect of some COVID vaccines and the ‘phantom pain’ that can be felt when biodiversity is lost.

Verticals

scienceresearch

Originally published on Nature on 2/17/2026