Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to tone legs while sitting [title] Rotate your ankles. [step] Rotate your ankle in a circle, moving either clockwise or counterclockwise, for 5 seconds. Then, repeat the process but rotate your ankle in the opposite direction.

Ending1: Stay on your toes, and with your hand hold your leg up straight, while with your left hand shift your left wrist to your right side. [substeps] For continued exercise, you may rotate your ankle with your palm facing the same direction each time your remaining leg moves. Ending2: Do 3 sets of 20 repetitions and then repeat with the other ankle. [substeps] If you don't want to have to count, set a timer for 1 minute instead of counting out 20 repetitions. Ending3: This reduces the likelihood of your ankle becoming too rigid. [substeps] Do ten reps with each leg, moving from the toes out to the base of your foot. Ending4: You can also do 90-degree turns to either side, a coordinated exercise. [title] Decide if you want to incorporate a standing side routine.

Answer format: ending1/ending2/ending3/ending4