High-intensity interval training (HIIT) combined with strength training is considered the best exercise to reverse aging. HIIT boosts mitochondrial function and cellular energy production, which declines with age. Strength training maintains and builds muscle mass, preventing age-related muscle loss and keeping metabolism active. Resistance exercises also improve bone density, reducing osteoporosis risk. Adding flexibility work like yoga or stretching maintains mobility. Cardiovascular exercise improves heart health and circulation. Research shows that combining these exercise types provides the most comprehensive antiaging benefits. Aim for at least 150 minutes of moderate activity weekly, including 2-3 strength training sessions. Start gradually and increase intensity over time. Consistency matters more than intensity for long-term antiaging results.