When experiencing a severe cold or flu, it is recommended to stop training and prioritize sleep and recovery activities.

“If I have a little tiny sniffle, like I think I might be getting sick, even then, I'm a little cautious in the sense that I'm not going to do my typical workout. I might stop at about 15 minutes earlier. And I would do that not by neglecting any body parts or anything of that sort. If it's a weight training workout, by simply reducing the total number of sets, I probably wouldn't do any sets to failure, if I did, I might reduce the total number or percentage of sets to failure from about 30% of sets to maybe closer to 10% of sets, something like that. And if it was endurance work, I might throttle back by 10 or 20%. And I will shorten the total duration of the workout.”