I am often hit by &quot;sickness&quot; when pushing very hard while lifting weights in the next 2-3 days after exercise, e.g. I do 30,000lbs dumbbell press volume and in 2 days I fall sick. So it might be wise not to overdo things, maybe some poeple&#x27;s immunity gets compromised if they push too much and it takes very long until their immunity improves? And I did all kinds of immunity-boosting things like daily 5-minute cold showers etc.