Lactic acid builds up in muscles during intense exercise and causes a burning sensation. However, it is not responsible for next-day muscle soreness.

The back consists of large, complex muscles that support your trunk and spine. There are many types of back muscles, and they are all essential, helping you walk, bend, twist, and hold your body ...

If you’re lucky enough to live to 80, you’ll take up to a billion breaths in the course of your life, inhaling and exhaling enough air to fill about 50 Goodyear blimps or more. We take about 20,000 ...

The human body is a wonderous thing, especially when you consider how intricate and efficient each bodily system is. For instance, an adult’s blood vessels could encircle the earth 2.5 times if ...

Strength training is key to staying healthy as people age, with experts recommending working major muscle groups at least two days per week. Marfred Suazo, a fitness professional known as Fonz the ...

Strong calf muscles propel you forward when walking and running, generate the explosive power needed for jumping, help maintain your balance and stability and protect your feet, ankles and knees from ...

Daily electrical stimulation of certain nerves in the spinal cord appeared to help three people with spinal muscular atrophy (SMA), an inherited disorder that causes muscles to waste away. The ...

Here’s what the workout can and can’t do for your fitness. Credit...Eric Helgas for The New York Times Supported by By Danielle Friedman Q: I’ve heard that Pilates can give you long, lean muscles. Is ...

In this episode of Crash Course Botany, we’ll explore how the processes of photosynthesis! Plants and trees may seem pretty passive, but behind the scenes, their cells are working hard to put on a ...