Mice compensate for extra exercise by reducing other physical activity

Exercising mice slack off so much afterwards it defeats the weightloss purpose

Not OP, but how about: "Mouse study: more exercise induces more non-fatigue-related sedentary behavior"

I was more complaining about the NY Times headline, I'm sympathetic to the idea of wanting the headlines here to match closely to the article itself.

Some of the other folks here have commented with good ideas.

Mice have a hard-coded exertion limit.

Exercising mice lessen aimless movement, nixing some of expected weight loss

Is 80 a hard-coded limit?

exercise countered with increased sedentary behavior