Habits
Your Problem Is Not Exercise. It Is Sitting.
A one-hour workout does not cancel ten hours in a chair. The answer is more movement, more often, plus some lifting.
Reviewed by Jeffrey Blue, MD · 2 min read · October 15, 2026
The short version
- Aim for 150 to 300 minutes a week of moderate activity.
- Lift twice a week: about 30 to 60 minutes a week went with the biggest drop in risk.
- Get up every 30 minutes. One workout does not cancel a day in a chair.
Most adults need at least 150 minutes a week of moderate activity, like brisk walking, plus muscle-strengthening work on two or more days. That is the Physical Activity Guidelines for Americans. But the research adds a third rule the guidelines also make: move more and sit less, all day.
Rule one: get your heart rate up
Aim for 150 to 300 minutes a week of moderate activity, or 75 to 150 minutes of vigorous activity. Fitness pays off without an obvious ceiling. A 2018 study in JAMA Network Open followed more than 120,000 adults who took treadmill tests and found that the fittest had the lowest risk of dying during follow-up, with no point where more fitness stopped helping.
Rule two: lift something
Strength training builds and keeps lean muscle, which improves body composition even when the scale does not move. A 2022 review in the British Journal of Sports Medicine pooled 16 studies and found the biggest drop in risk, roughly 10% to 20% lower risk of dying from any cause, at about 30 to 60 minutes a week of muscle-strengthening activity.
You do not need a gym. Squats, push-ups against a counter, lunges and resistance bands all count. Work each major muscle group twice a week.
Rule three: stop sitting so much
We all sit too much: at a desk, in a car, on a couch. A 2016 analysis in The Lancet pooled data on more than a million people. Among those who sat the most, it took about 60 to 75 minutes a day of moderate activity to cancel out the higher risk that went with all that sitting.
Most people will not hit that every day, which is why the small moves matter. Stand up every 30 minutes, as the American Diabetes Association suggests. Walk during calls. Take the stairs. A 2022 study in The Lancet Public Health found that more daily steps went with lower risk, leveling off around 6,000 to 8,000 steps for people over 60 and 8,000 to 10,000 for younger adults.
The simplest version
Walk every day. Lift twice a week. Get up every half hour. If you are new to exercise, have chest pain or a heart condition, check with your doctor before you start, then start small and build.
Sources
- U.S. Department of Health and Human Services. Physical Activity Guidelines for Americans, 2nd edition, 2018.
- Mandsager K, et al. Association of cardiorespiratory fitness with long-term mortality among adults undergoing exercise treadmill testing. JAMA Network Open, 2018.
- Momma H, et al. Muscle-strengthening activities are associated with lower risk and mortality in major non-communicable diseases. British Journal of Sports Medicine, 2022.
- Ekelund U, et al. Does physical activity attenuate, or even eliminate, the detrimental association of sitting time with mortality? The Lancet, 2016.
- Paluch AE, et al. Daily steps and all-cause mortality: a meta-analysis of 15 international cohorts. The Lancet Public Health, 2022.
This article is general information, not medical advice. Make decisions about your care with your own doctor.