Science-backed habits can add years to your life while improving health as you age. Lifestyle choices like diet, exercise, and reducing sedentary time play a major role in longevity, even outweighing genetic factors in some cases.
Researchers now focus more on healthy aging—often called healthspan—rather than just extending lifespan. Amanda Boyce, a health scientist at the National Institute on Aging, emphasizes that the goal should be maintaining well-being, not just living longer.
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Lose even a little weight
Obesity is tied to chronic diseases like diabetes and heart disease, which shorten lifespans. Losing just 5% of body weight can improve blood sugar and pressure.
Frank B. Hu, chair of nutrition at Harvard T.H. Chan School of Public Health, notes that weight loss—whether through lifestyle changes, medication, or surgery—reduces risks of diabetes, cardiovascular disease, and some cancers.
Sit less, even if you exercise
Prolonged sitting, like TV watching, raises the risk of diabetes, heart disease, and early death. Hu links this to obesity and the displacement of physical activity.
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Regular workouts don’t cancel out the harm of sitting all day. Katherine T. Ward, a geriatrics chief at Stanford Medicine, says movement is critical for cognition and mobility in older adults. The CDC recommends at least 150 minutes of moderate activity weekly.
Boyce suggests weaving activity into daily routines: exit the train a stop early or walk while watching TV.
Quit smoking
Smoking is linked to cancer, heart disease, diabetes, and COPD. Quitting can add up to 10 years to life expectancy.
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Make it last
Experts agree: small, sustainable changes work best. Hu prioritizes maintaining a healthy weight. Ward advises adding 30 more minutes of activity to your routine. Boyce encourages finding joy in movement, whether it’s a post-dinner walk or a dance party.
Kwan stresses matching habits to personal goals. If avoiding dementia is a priority, focus on diet, exercise, stress management, and sleep. The key is consistency—not quick fixes.
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