I don’t know about you guy’s, but this is the third time I am sick/flu over a 3 month period. Very frustrating!!!
I think this is because I have been on a calorie restricted diet, while I have been using hiit/interval training (3-4 times a week) with 5x5 weight training (low volume, high intensity). The results of the fatburning, have been very good so far, and the muscle mass and strength has gone upwards
But in the long run, I think that the hiit is too intense for the immune system for an natural lifter when dieting. Yesterday I ran 2 x 400 meters, and today I had to leave work because I was not feeling well, now I have the flu again
So from now, when I feel better, I will stop doing hiit, and instead do low intensity cardio in the mornings instead.
My conclusion about hiit, is that it should either be done when training for mass when the body has enough calories, and limit hiit training while dieting.