Sit ups can be anchored or unanchored just make sure to note which you choose. What they cannot be is a crunch. The ROM for the sit up requires your shoulder blades to touch the ground and coming to a seated position. At BX the Big Dawg version requires the butt stay on the ground, feet unanchored and hands flat on the ground, arms not being used for momentum.
Paul the current Burpee seen on the vids should probably be considered a different exercise and called a different name. Something like “Anyway From Standing to Flat on the Ground and Back to Standing”. A proper Burpee involves
2. Hands on the ground
3. Kick feet back to plank
4. Push up
5. Bring feet in
Garddawg - 26 April 2010 06:33 PM
Burpees when you bring your feet and prepare to jump it is a good idea to:
a. Jump your feet to the outside of your hands
b. rock back on your heels
c. Extend your Thoracic and Lumbar regions (straighten your back)
You will find if you do this that you are in something that approximates the bottom of the squat. It is much safer and more efficient to jump from that position than the usual position people find themselves in.