Mary Claire Haver, MD@drmaryclaireTikTok

Here's the exercise prescription I give every patient: minimum of 250 minutes a week …more

original sound — @drmaryclaire

what it claims

Engage in a minimum of 250 minutes of physical activity per week, distributed as approximately 150 minutes of moderate cardio and 100 minutes of muscle strengthening (roughly 35 minutes per day), to optimize longevity, fitness, and blood pressure regulation, with benefits that are particularly pronounced in women.

holds up

Mary Claire Haver’s recommendation is based on particularly solid and up-to-date science.

noli's read

Mary Claire Haver’s recommendation is based on particularly solid and up-to-date science. The 150-minute cardio recommendation aligns with global guidelines from the WHO (Bull et al., 2020), derived from large reviews and observational studies linking this dose to a healthy cardiovascular system. Regarding the 100 minutes of strengthening, the meta-analysis by Shailendra et al. (2022) shows that such a practice actively supports general vitality and cellular longevity. Fascinatingly, the observational study by Ji et al. (2024) confirms that women experience increased longevity gains from an exercise volume often lower than that of men. Furthermore, the positive impact of strength training on managing blood pressure in women is well-supported by the observational study by Park & Park (2024). This comprehensive and accessible approach of 35 minutes per day constitutes an ideal balance for optimizing daily fitness.

the sources

Claimed by Mary Claire Haver, MD. Noli grades the claim, never the person.

Decoded by Noli · July 14, 2026 · the original post

What the graded evidence says

Evidence: B

Linked to, not proven to cause.

Effect: all-cause mortality by combination of aerobic + muscle-strengthening activity — 1 h/week aerobic HR 0.85 and levelling to ~0.73 at 3 h/week; adding muscle-strengthening 1-2x/week conferred further risk reduction; lowest mortality in those meeting both guidelines
Measured on: US adults (416,420 and 500,705 in two national cohorts)

These are associations from observational cohorts, not proof of cause; healthier or more motivated people may do more of both. The specific percentages sometimes quoted for one activity vs another come from particular studies and shouldn't be treated as fixed.

Mary Claire Haver, MD in the Register58 claims graded · solidity 89/100See their record →