Weekend-only exercisers lived almost as long as daily ones

Researchers at Loughborough University and University College London analyzed health survey data from England and Scotland, sorting adults by how their weekly exercise was actually distributed rather than just by the total amount, then tracked death records over the following years.

Among 63,591 adults followed for an average of about nine years, people who got their recommended activity in just one or two sessions a week, so-called weekend warriors, had 30 percent lower all-cause mortality and 40 percent lower cardiovascular mortality than inactive adults, almost matching people who spread activity across most days.

Even adults who managed less than the recommended amount in one or two sessions saw similar reductions, which suggested that how often people exercise matters less than once assumed. The data came from self-reported activity in health surveys rather than a controlled trial, so it cannot rule out that healthier people were simply more likely to exercise in the first place.

One or two hard sessions nearly matched exercising daily.