what may be more suitable is 3-4 sets of 10-15 well executed sit-ups which work the core hard enough to elicit muscular and strength adaptations and challenge you towards the end of your sets.

I loved the challenge Of course, my abs still look exactly the same after a week of zombie sit-ups — visible abs are the result of a low body fat percentage, so no amount of ab workouts alone ...

When performing your classic dead bug, you’ll extend one arm and the opposite leg, then switch sides. For an ipsilateral dead bug, you’ll work on one side at a time, forcing your stabilizing muscles ...