Ditch sit-ups — strengthen and define your core with 1 dumbbell and this 5-move ab workout
To ramp up the challenge, some of these moves incorporate a dumbbell, which not only increases difficulty but also helps ...
Tom's Guide25d
I ditched planks for zombie sit-ups for a week — here's what happened to my core
Reverse the exercise ... If you feel that you are arching your back, or straining your neck as you sit up, you’re probably lifting too heavy. If you have any pain in your back the next day ...