Chapter 45, Problem 13PIAT

Summary Introduction

To review:

The effect of training for a marathon on the number of muscle cells in the gastrocnemius.

Introduction:

Gastrocnemius is the muscle that forms the half of the calf muscles present on the back of the lower leg. The muscle fiber is a thin and long muscle cell. The muscle cell contains myofibrils that consist of repeated units of sarcomeres (alternating dark-light units). Regular workout results in the increase in overall length of sarcomeres.