If you work a desk job, your muscles are probably tighter than they should be. This is because sitting forces our muscles to stay in relaxed, shortened positions. Without regular stretching, the muscles will adjust to this by gradually decreasing their length; a process known as adaptive shortening.
The hamstrings—the muscles at the backs of the thighs, running down to the knee—are one potential problem area. Tightness of these muscles can lead to other issues, including bad posture and lower back pain.
