I think "easiest" is sauna. Exercising is good because it can also help with your mood and brain functioning. I heard conflicting information about cold shocks.

I think "easiest" is sauna. Exercising is good because it can also help with your mood and brain functioning. I heard conflicting information about cold shocks. There is also fasting which as top comment said works similarly to original link. If you want to read for example about sauna I recommend thishttps://www.foundmyfitness.com/topics/sauna https://www.foundmyfitness.com/topics/sauna she also has a lot of stuff about other things I mentioned