Have been noticing this for sometime, when I do regular weekly fitness like going to the gym I face post-workout inflammation or sore muscles but this is all very much expected and I noticed that if I don't do any fitness for a few weeks sometimes some pain in a leg or the back or a knee comes out and sometimes increases somewhat day over day but all these non-workout related pains disappear incredibly quickly as soon as I get back to my usual fitness training. I'd be curious to understand if there is any reasonable/logic explanation for this. Why does getting back to doing workout solve these non-workout related pains?

  • 2
    I have arthritis and working out makes my joints feel better. Having nutrient rich blood fill your muscles can be good for healing, unless your powerlifting or heaving heavy weights. You shouldn't just experience pain for no reason. It's also possible you have muscle asymmetries, curved spine, tight muscles, etc.. I'd see a doctor
    – Ace Cabbie
    Jun 21, 2020 at 2:16
  • @AceCabbie I agree, except that I've found that heavy lifting has actually done really good things for my joints and muscles. As long as you are using good form and respecting your personal limits then it is a great way to challenge your body in a way that it usually isn't
    – Kevin
    Jul 20, 2020 at 21:14

2 Answers 2


When you stop working out, your muscles and tendons will start to lose their flexibility since they won't be warmed up and moved as much. This can happen much more quickly than a noticeable loss of strength, and even a small amount of tightness in a joint or muscle group can lead to aches and pains, especially in load bearing joints like your knees or back. Then when you start working out again your muscles can warm up and stretch out again, which then solves the symptoms you were feeling.

If you aren't able to work out for a while and want to avoid that situation, you could try just actively stretching once or twice a day.

  • Stretching is something I do often because I feel the benefit it brings. What do stretching and working out have in common?
    – whatever
    Jul 26, 2020 at 12:56
  • I'm not sure what you mean. Both can warm up and stretch your muscles, which should help prevent aches and pains. Non-static stretching will do a better for that purpose than static stretching, so you can look into those techniques
    – Kevin
    Jul 27, 2020 at 17:45

Pain is just a signal from the body to the brain. If a signal is not needed anymore then you are not gonna feel pain.

After punching for a lot of time, you will notice your hands do not hurt anymore, if you stop for a long period and then start again, the pain will come back. It it's just normal human nature.

Same goes for the muscles and many more systems in the body, sometimes when pain goes away is not because the problem is not there anymore but because the body doesn't need to send the signal anymore.

Some examples are chronic starvation or thirst, after some time the body stops giving signals of hunger or thirst, even if the the body is still dying.

Soreness is just a mechanism for your body to tell your brain "hey you put your muscle through some stress they were not used to"

You will feel sore every time your muscles are put through some motions they are not used too...a powerlifting champion can get sore from a light weight dumbell fly, because their muscles are not used to that specific movement. But they will not get sore from a heavy bench press, because it's expected by the muscles.

  • I was wondering if this behavior was due to chemicals being produced by human body when getting back to regular workout sessions
    – whatever
    Jun 21, 2020 at 12:12

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