Have a hard time getting low for a squat? Can’t change direction as quickly as you’d like on the field/court? Flexibility is probably your issue. Flexibility is a critical part of fitness and often gets worse with age and the sedentary lifestyles that many people have today. Improved flexibility can improve your performance in aerobic training, strength training, and at sports, but is often overlooked in training routines. It also helps improve your posture through better muscular balance and reduces soreness and stiffness.