Chapter 6, Problem 4AWK

Summary Introduction

To review:

The rationale behind the thinking that muscles do not actively push the weight up during leg presses.

Introduction:

Muscles create movements or resist movement depending on their location and the task. The primary action of the muscles is a contraction. When the skeletal muscles contract, they pull the bone attached to them, while the joint acts as a lever. The movement of the bones creates displacement and the work is done. However, the muscles also oppose the movements.