Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to do the " hundred " exercise in pilates [title] Lie down on your back on the pilates mat. [step] Keep your hands completely extended by your side and your hands face down on the mat flexed towards the bottom of the mat. [title] Bend your knees and keep your feet flat on the floor, with your toes pointed towards the bottom of the mat.

Ending1: [step] Don't put too much weight on your toes, but try to keep your ankles and legs flat on the floor. [title] Keep your hands at about shoulder width on the mat. Ending2: [step] As always, cross your torso over and to the side; your arms will be catching your knees so don't force them to come up. [title] Keep bending forward, following the instructions provided in your pilates exercise textbook. Ending3: [title] While inhaling, lift your right knee so it is bent above your hips, parallel with the mat. [title] Exhaling, lift your left knee so it is parallel with your right knee. Ending4: [title] Put all of your weight on your outside right ankle. [title] As you lift into the lunge position, you want to land your left ankle on the mat.

Answer format: ending1/ending2/ending3/ending4