1: Get a toned core with these quick and effective ab circuits.

2: Circuit 1 includes planks, crunches, and Russian twists.

3: Circuit 2 features leg raises, bicycle crunches, and mountain climbers.

4: No equipment needed for these must-try ab workouts.

5: Perfect for those with busy schedules who still want to stay fit.

6: Work those ab muscles in just a few minutes a day.

7: Increase intensity by adding weights or resistance bands.

8: Consistent practice will lead to stronger and more defined abs.

9: Say goodbye to long and boring ab workouts with these circuits!