7. The time stopper - also known as planks.
Time: 30 seconds
Do this for 30 seconds at the end of the workout.
It might feel like 30 days.
Rest: 30 seconds
5. Reach through crunches
Time: 30 seconds
Muscle Focus: Upper abs, Lower abs
Aim to contract your ab muscles to full flexion.
Reach as far as you can through your thighs.
Rest: 30 seconds
4. Single-leg raises
Time: 30 seconds
Muscle focus: Lower abs, Hip flexors
Keep your palms flat at your side in order to ensure you stay stable.
Focus on keeping the stationary leg high when extending the opposite leg.
Rest: 30 seconds
3. Slide-up crunches
Time: 30 seconds
Muscle Focus: Upper abs
The goal is to crunch in with your abs to slightly get your back off the ground.
Rest: 30 seconds
2. Reaching oblique crunches
Time: 30 seconds
Muscle focus: Obliques
Use your arm to reach across your body to the opposite heel.
Focus on squeezing the core through the movement.
Rest: 30 seconds
Everyone wants a 6-pack.
But most people have no idea how to start building their core.
Here is a 7-exercise routine you can do to start building your 6-pack in just 7-minutes a day: