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Strength training creates tiny muscle tears that help muscles grow stronger as they heal. Allow at least 48 hours before working the same muscles again. You can do aerobic exercise in between, or alternate upper- and lower-body strength sessions on consecutive days.

A healthy snack can help keep hunger in check between meals. For more staying power, pair protein and healthy fats, such as Greek yogurt and nuts, veggies with hummus, or apple slices with almond butter.

Harvard Medical School Dean Dr. David Roberts shares practical steps, including exercising regularly, avoiding smoking and pollution, maintaining a healthy weight, staying up to date on checkups and vaccines, and discussing lung cancer screening with your healthcare provider if you’re at high risk.

How much do you know about keeping your hips and knees healthy? Take this 10-question quiz to test your knowledge of common causes of pain, risk factors, warning signs, and treatments — and learn practical ways to protect your joints and stay active.