For the most part I read that 2-3 HIT workouts per week is advisable. But, what I’m not able to make up, is the ‘total time’ or ‘percentage’ of HIT per week that goes with this. If you do for example 3 HIT workouts of 2h a piece per week + 6h of endurance work, the HIT part equals 50%. Would this be ok? And, could one do 4 HIT workouts of 1,5h a piece instead of 3 x 3h HIT workouts and have the same strain levels?