In older adults who don't move much, taking a weekly rapamycin pill might slightly weaken the benefits of a 13-week home exercise program on leg strength and mobility, according to some detailed number crunching—even though the main results weren't clear-cut.

Taking a weekly low dose of a drug called rapamycin while doing a 13-week home exercise program might help older adults (65–85 years old) get stronger legs — but we’re not totally sure how much it helps because the study was small and short.

Doing strength and cardio exercises at home for 13 weeks helps older adults (65–85) get stronger in their legs and move better, whether or not they're taking a drug called sirolimus.

Older adults who take a weekly 6 mg dose of sirolimus while exercising might see slightly less improvement in hand strength and walking ability compared to those taking a fake pill — suggesting the drug could be limiting some of the usual benefits of exercise.

Taking a weekly 6 mg dose of the drug sirolimus doesn't help older adults get extra benefits from exercise — and might even cancel out some of the gains they'd normally see.

Older adults taking a weekly 6 mg dose of sirolimus while exercising for 13 weeks may have more side effects overall than those taking a fake pill, including a serious lung infection like pneumonia, even though about the same number of people had side effects in both groups.