Your target heart rate is the range at which sustained physical activity - running, cycling, swimming laps, or any other aerobic exercise - is considered safe and effective.
Learning how to prevent knee injuries and treating them if they occur can help you stay active at work and play.
For optimal health, you need at least 30 minutes of moderate-intensity exercise five or more days a week, says the Centers for Disease Control and Prevention. You also need to include strength training and stretching in your weekly workout schedule.