A six-pack for Christmas?

You'll want to include these ab toning exercises into your workout ... check out some variations to the boring crunch.

90 Degree Leg Hold

The 90 degree leg hold is an isolation exercise targeting the lower abs.

Step 1: Position yourself on some dip bars holding your body vertical with your legs off the ground.

Step 2: Pull your knees up to form a 90 degree bend at the hips.

Step 3: Hold this position as well as you can.

Pretend that you are sitting on an invisible chair.

Start by holding for 15 seconds and increase time as you get better.

Cable Crunch

The cable crunch is an isolation exercise targeting the core.

Step 1: Start by kneeling under a high pulley with a rope attachment.

Step 2: Hold the rope attachment with both hands and position the rope so that your hands are next to your cheeks.

Step 3: Bend your hips slightly and keep your back straight. This is your starting position.

Step 4: Contract your abs to pull the weight until your face is near the floor and your elbows reach your thighs.

Step 5: Keep your hips still and exhale as you pull down and hold at the bottom for 2 seconds.

Step 6: Slowly rise to the starting position whilst inhaling.

Repeat for the desired number of repetitions.