You know you should develop a regular exercise routine, but you lack motivation. Promises to yourself are quickly broken, and you never establish enough of the workout habit to experience any rewards.

Hers pumped up the music and found the best streaming playlists to help you stay in your target heart rate zone for any workout.

Dr. Grover Smith, right, works out with exercise scientist Dr. Irv Rubenstein, left, at STEPS Fitness, Wednesday, Feb. 12, 2025, in Nashville, Tenn. You know you should develop a regular exercise ...