- Plank (pump it up by doing the single leg version)
- Burpee (great cardio)
- Dragon Walk (challenging exercise)
- Pike Roll-Out (rolling all the way back adds extra punch)
- V-Sit (hold it!)
Challenging your core is a great way to get started and there are many versions of these exercises to consider. (Simply removing a jump and adding a knee bend reduces impact for those experiencing joint issues.)
Check-out this series of YouTube videos from Tee Majors: [youtube=http://www.youtube.com/watch?v=lZ8p72f5c3I&feature=share&list=PLwBvfBuTasmy66jz-FeFG7N9hyhLt4qzB>
If you're unfamiliar with these exercises, find a friendly trainer or watch yourself complete each movement in-front of a mirror to reduce the risk of injury.