Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to do leg lifts with an exercise ball [title] In a standing position, press the exercise ball between your chest and a wall, with your feet flat on the floor. [title] Stand on your toes and slowly raise yourself up. [step] Pause and hold this position for a few seconds.

Ending1: [title] Lower yourself down slowly until your feet are flat on the floor again. [step] Complete 12 repetitions of this exercise, and repeat until you've done 3 sets. Ending2: [title] Lower yourself back into the standing position, with your heels on the floor, touching the wall, again for approximately 20 seconds. [title] Starting from the toes and a little ways forward, grab the ball in your right hand, and pull your body up. Ending3: [title] To loosen tightness, squeeze the ball between your thumb and forefinger. [step] As you lift, firm your abs and thighs by taking control of the ball. Ending4: There should be a slight bend in the front leg at the knee (and a base for the inside knee to be ) [title] Go all the way down to the ground. [title] Do 3 or 4 sets of 8 sit ups and then increase the number of sets until you have at least 8 full sets.

Answer format: ending1/ending2/ending3/ending4