Want to tone your abs? This ab circuit can be done anywhere, and you’re guaranteed to feel the burn.
1 minute, ab crunch (keep legs at 90 degrees)
Rest 15 seconds
1 minute, bicycle crunches
Rest 15 seconds
1 minute, Russian twists (optional: hold a ball or weight)
Rest 15 seconds
1 minute, plank
Rest 15 seconds
Repeat this circuit 3 times.