AP BIOLOGY

Detailed explanation-1: -Lactic Acid Buildup Causes Muscle Fatigue and Soreness. Anyone who has pushed themselves through an intense workout will be familiar with “feeling the burn”-that sensation of fatigue and pain that sets in when you subject your muscles to lifting heavy loads repeatedly or sprinting all-out.

Detailed explanation-2: -"It does build up in the muscle during exercise, and your muscle can be chock-full of it by the time you finish a strenuous workout, but generally all of this lactic acid is gone within about an hour afterwards.” Put simply, lactic acid clears out well before muscle soreness ever even begins.

Detailed explanation-3: -High-intensity exercise can cause tiny, microscopic tears in your muscle fibers. Your body responds to this damage by increasing inflammation, which may lead to a delayed onset of soreness in the muscles.

Detailed explanation-4: -During intense exercise, there may not be enough oxygen available to complete the process, so a substance called lactate is made. Your body can convert this lactate to energy without using oxygen. But this lactate or lactic acid can build up in your bloodstream faster than you can burn it off.

Detailed explanation-5: -Lactic acid is fuel for your cells during intense exercise. It’s created when your body breaks down glucose and other carbohydrates. It’s a common myth that muscle soreness you feel after exercise is caused by lactic acid trapped in your cells.