I am often hit by "sickness" 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'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.
You should know what your limit is to not get sick if that is a recurring problem. What I was referring to is some people stopping a set right when they feel slightly fatigued or feel the burn. I was referring to people who smile and talk as they are lifting or working out.
