THEVISUALMD / SCIENCE SOURCE / SCIENCE PHOTO LIBRARY THEVISUALMD / SCIENCE SOURCE / SCIENCE PHOTO LIBRARY
Cross-training maximizes your health by keeping you strong, flexible, lean, and motivated. You need aerobic exercise to strengthen your heart, lungs, and stamina. You need anaerobic exercise to increase muscle strength, speed, and power. You also need to stretch and incorporate side-to-side movement. Some activities should be highly challenging and others just plain fun. Mixing up your workout routine helps protect you from injury and keeps you motivated to stick with your exercise regimen.
Model release not required. Property release not required.