[steel_resolve]

I do this 5 days a week, for an hour a day. Incredibly difficult. Definitely have noticed an improvement over time, but am very tired at night.

[RoosterRedux]

I was thinking about doing HIIT everyday but have read numerous studies that recommend only 2 to 3 times a week so your body can recover.

I think filling in those other days with a regular cardio of running, biking, swimming, or rowing would not be a problem.

I did notice when I started (last week), I did feel tired.

[b4me]

muscle needs recovery time or the muscle you are building really isn’t the best. I read years ago and know people today who only do intense exercise, fatiguing multiple groups of muscles, once or twice a week and get good results because of the true recovery days. meaning don’t do cardio or go hiking or other “exercise” on the off days - truly let your muscles have a chance to knit/build. I know too many people exercise themselves into injury shoulder, back, leg, they are too bought into “have to exercise 5-7 days a week” and it’s not healthy for most people.