My routine includes about an hour of yoga before I ride in the morning, which includes a lot of stretching. I find it important to get a full range of motion in my joints and develop a feeling of flexibility BEFORE I ride. This helps me maintain the right posture and flexibility to prevent injuries and fatigue. Less important for short rides than long ones. I've noticed the difference markedly on all-day rides. Less so on a commute but it's part of my routine and the yoga has other benefits too.