Hi bbbillyboyyy,
I don’t do HIIT at all because I’m too lazy but I do push ups and planks and 10000 steps a day. Not doing them the way it says in the book (I forgot they were mentioned in the book) or on any evidenced basis at all, it just seemed better to do something rather than nothing. I started with 20 sec planks and added 5 sec a week and now up to 1 min and don’t intend to increase any more. I only do 1! But since starting them about 3 months ago there’s been a definite increase in muscle tone in my core, both belly and midriff. Push ups- only started a few weeks ago, started with 1 and now up to 5 and aiming for 10. My upper body strength is crap but improving.
I do them Mon-Fri and have a break on the weekend, mainly because I forget to be honest.
Probably not terribly helpful! I can only say that even though my ‘regime’ is so pathetic It seems to be effective for me.