Your skeletal muscles make up between 40 to 50 percent of your total body weight. Skeletal muscle mass begins to decline as you get older. This process typically begins after the age of 40 .

The muscular system can be broken down into three types of muscles: skeletal, smooth and cardiac. The muscles in the body support movement, help maintain posture, and circulate blood and other ...

The human muscular system is complex and has many functions in the body. These include mobility, stability, posture, circulation, digestion, and more. There are several different types of muscles ...

Ask students to draw diagrams of these muscles in two positions of movement to show how one muscle is contracted while the other is extended, and vice versa. Body systems Now playing video 3 of 7 ...

The paraspinal muscles are the muscles that support your spine and allow you to do a ... bend forward, or twist your torso. This makes them a good area to focus on if you’re looking to ...