More formally, chiroplasty, or cheiroplasty, is a term which refers to plastic surgery of the hands. The term combines root word chir(o), which means hand, and the suffix -plasty, which means surgical repair.
(How Do Your Muscles Work continued) Thousands of thin spaghetti-like fibers make up muscle tissue. These fibers receive messages from the brain, causing the fibers to contract. The main muscles at work in cycling are the quadriceps and hamstrings in the upper leg, and the gastrocnemius and soleus in the calf. These muscles contract in a sequence that creates the pedaling action. The quadriceps and hamstrings do most of the work when you ride a bicycle.
2) Weak Hamstrings: Again, this muscle group is used in cycling but not as much during the power stroke with the exception of the knee flexor on the upstroke. Again, this muscle group needs to be maintained in the weight room.t really lets you know what muscles are working and when during the pedal stroke. One observation I can make is that the hip extensors are used during the power stroke. However the glutes nor hamstrings are neither a dominant muscle group being used during cycling during the POWER STROKE. They are used on the upstroke.