Can I do abs/cardio on my "rest" days while doing SS?
Cardio probably yeah. Abs no. You don't want to be doing squats and deadlifts with weak abs. Do abs on your workout days.
>>42127614
>>42127614
Abs yes, as long as you don't exhaust them completely you'll still have enough stability to squat/deadlift
Cardio no, because it will wear your legs out and you won't be able to recover. If you're going to do cardio do it after you lift