I used to do this type of exercise every day and metabolic and brain function were amazing. I have reduced it to two times a week now and the other days i do strength training and zone 2 cardio primarily. i have no idea if my new exercise program is better but i was finding too many injuries with too much HIIT.
Do the sprints on a ski machine, rowing machine, or stationary bicycle.
Non-impact is key, unless running on grass.