As a cyclist (really, as a typical person), it's extremely common for us to experience tight muscles in our daily lives. A tight muscle is a short muscle, and a short muscle cannot provide the power that a long muscle can. So, we need to stretch out those muscles to make them long again. The three tightest muscle groups that can affect us roadies are our hip flexors, hamstrings and calves. But it's clear that doing some specific stretches to help lengthen these muscles groups can have a profoundly positive effect on our riding.