[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. 
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.