The debate about how hard to push during exercise has persisted for decades, with fitness approaches swinging between high-intensity interval training and gentler, steady-state activities. However, ...

Exercise is an important component of a healthy lifestyle. The current Physical Activity Guidelines for Americans from the U.S. Department of Health and Human Services indicates adults need 150 ...

As an exercise science researcher, I support the American College of Sports Medicine's recommendation of a minimum of 150 minutes per week of moderate aerobic exercise, or 75 minutes per week of ...

Discover why focusing on all three types of exercise—aerobic, strengthening, and balance—is crucial for older adults. Learn how combining these activities can boost your health, reduce injury risk, ...

An exercise schedule for healthy weight loss typically involves a combination of cardiovascular exercise and strength training. Tracking daily calorie consumption also helps. Choosing the right ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. January 12, 2026 Add ...

Fitness intensity can be one of the most subjective areas of working out. From “rate of perceived exertion” (or RPE) to the famous “runner’s high” or getting “in the zone,” these metrics can, at best, ...

Exercise helps boost energy at the cellular level by increasing mitochondria function and ATP production, while stimulating neurotransmitters like dopamine and serotonin that regulate mood and ...

In a busy world with work demands, family obligations and seemingly endless to-do lists, it can be hard to find any time to exercise — let alone hit the (fairly intimidating) recommended amount per ...

Sabrena Jo, Ph.D., senior director of science and research at the American Council on Exercise, has decades of experience helping people find ways to become physically active. From working one-on-one ...