When muscles are over-exerted, the muscle cells carry out anaerobic respiration to compensate for the oxygen deficit. Lactic acid produced as a result of this causes muscles to become sore or develop cramps.
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Muscles can become sore after working out due to the buildup of lactic acid, a byproduct of anaerobic metabolism during exercise. This buildup can cause temporary muscle fatigue and soreness known as delayed onset muscle soreness (DOMS).
Usually, sore muscles are a result of a build-up of lactic acid. Lactic acid molecular formula is C3H6O3, or 3 carbon, 6 hydrogen, and 3 oxygen.
It Builds up when you exersize and muscle cant get enough oxygen. its another way of creating energy.
When exercising, lactic acid builds up AFTER the stored glycogen in your muscles are used up. It builds up in your muscles. It is what makes your muscles burn. Its buildup is what makes your muscles tire and give out. Lactic acid is actually a fuel, not a caustic waste product. Muscles make it deliberately, producing it from glucose, and they burn it to obtain energy. The reason trained athletes can perform so hard and so long is because their intense training causes their muscles to adapt so they more readily and efficiently absorb lactic acid. If you're a new exerciser, chances are you will be very sore after your first workouts, but will build up a tolerance to it. This means you're getting stronger!
If you stop working out for seven days, your fitness level may decline slightly, but it won't have a significant impact on your overall health or progress. It's important to listen to your body and resume your workouts when you feel ready to maintain your fitness level.
Epsom salts are used for sore muscles in athletes and others. These Epsom salts have drying and pain relief properties. They can also be used as laxatives when ingested.