<human>: What is the best way to: How do I do sit ups

OPTIONS:
- Lay your ear against the ground, bring your knees up to a 90 degree angle then go up and down against your legs back to the ground
- Lay your back against the ground, bring your knees up to a 90 degree angle then go up and down against your legs back to the ground
<bot>: Lay your back against the ground, bring your knees up to a 90 degree angle then go up and down against your legs back to the ground