Weight training, also known as resistance or strength training, builds lean muscle, strengthens bones and joints, and can help keep your metabolism healthy so you burn more calories even at rest. You ...

Regular exercise can help improve your mood, mental health, and sleep in the short term, while long-term benefits include maintaining a healthy body weight, building muscle mass, and reducing your ...

Editorial Note: This brief was updated on October 23, 2026, to include the latest KFF polling data. It was originally published on December 14, 2021. For many years, KFF polling has found that the ...