Can I force my mom to do some exercise?

Throw burning doughnuts in front of the couch. When she jumps up to stomp them out, set the couch on fire as well. Then shoot at her feet. It'll be almost like calisthenics when she jumps to avoid being shot. When it looks like she's about to give up, tell her that McDonalds has a $5 buffet and free milkshakes - but hide her car keys.