Myasthenia gravis is a chronic condition that causes muscles to tire and weaken easily. For example, if you have myasthenia gravis, you may notice that during a meal, your jaw muscles become tired ...

Spinal muscular atrophy (SMA) is a disorder affecting the motor neurons—nerve cells that control voluntary muscle movement. These cells are located in the spinal cord. Because the muscles cannot ...

Many people expect to see quick results when trying to build muscle. It's understandable, especially when you constantly see others showing off their progress on social media. However, the process ...

Even if you go to the gym every day, you won't automatically get healthy muscles. In addition to a balanced regimen of exercise and strength training, you need a good diet to help you build and ...

Longterm lifters know that leg exercises are what really separate the men from the boys, and if you're looking to build full body muscle, then it's time to start prioritising your quads.

Muscular atrophy is the thinning, wasting, or loss of muscle tissue, leading to decreased strength and mass. There are various types of muscle atrophy and different treatments for them.

What Is the Psoas Muscle? The psoas (pronounced so-ezz) muscles are two large muscles in your lower back. You have one on either side of your spine. They're the main muscular connection between ...

Muscle growth, or hypertrophy, is an increase in the weight of a muscle with no change in the number of fibers present. Depending on your physical needs and goals, you may be interested in taking ...

The first law of strength training is simple: Lift weights, and your muscles get bigger. That’s the fundamental bargain that gets people through the doors of the gym, and it’s true – up to a ...

The iliopsoas muscle is the major flexor of your hip joint. It’s made up of three muscles: the iliacus, the psoas major, and the psoas minor. These muscles work together to flex your hip, as well as ...

Teachers aren't the only ones who carefully follow grading systems. Physical therapists use a muscle strength grading system to define how a muscle or group of muscles is performing. PTs commonly use ...

Forearm exercises stretch and strengthen the muscles crossing your hands, wrists, and elbows. These muscles are used daily for tasks like opening a glass jar or carrying a suitcase up a flight of ...