To better understand muscle strains, it helps to understand the anatomy of the muscles.

Muscles make up about 40% of total body weight. The human body contains over 300 muscles that provide movement for the entire body.

Examples of major muscles include the:

• Whole body view
• Abdominal muscles
• Face
• Back
• Chest
• Shoulder
• Arm
• Neck
• Thigh
• Leg