I used this quick 10-minute core workout to build my deep core and fire up my abs with just a ball ...
If you have 10 minutes and space to lie down, you have everything you need to tackle this effective abs and obliques workout.
Move with control and focus, not speed, focusing on inhaling and exhaling as you move. Aim for 45 seconds of work, 15 seconds ...
Give this workout a try without sit-ups ...
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