1. Amanda Heringer Tara Gentry Christy Jeffery

2.  Back handspring: an acrobatic move in which a person executes a complete revolution of the body by lunging headfirst from an upright position into a handstand and then pushing off (i.e., "springing") from the floor with the hands so as to leap back to an upright position.  Back tuck: Gymnastics flips are acrobatic moves in which a person executes a complete rotation of the body while in mid air, with hips passing over the head, without hands touching the floor.  TUCK: legs together, with knees fully bent and drawn to the chest.

3. Slow Motion Back handspringSlow Motion Back tuck Full Speed Round-off Back handspring Tuck

4.  During take off and landing the quadriceps and gluteal muscles create the most power.  Gluteus Maximus is the main pushing muscle of the buttocks.

5.  The adductor muscles allow for the legs to squeeze together during the upside down phase of movement.

6.  The abdominals are used in essentially every move of a back handspring and back tuck.  Furthermore, the abdominals contract to pull the legs and pelvis over the top.

7.  The muscles of the arms, chest, and back work together to assist and oppose each other.  In a backhand spring they all aid to pass through the handstand position and push off the floor.

8. Phases of a Back Handspring 1. Starting Position/Set Phase 2. Pushing Off Phase 3. Pushing Back Phase 4. Arching of the Back Phase 5. Handstand/Touchdown Phase 6-7 Snap Phase 8-9 Landing

9. 1 2 3 4 5 6 Phases of a Standing back tuck 1. Starting Position/ Set Phase 2. Build up/Pushing off 3. Lift off 4. Initial entry 5. Tuck 6. Landing

11. Work =  KE +  PE

13. Phase 1Phase 2Phase 3Phase 4 Phase 1 – Center of gravity is moved to behind the body Phase 2 – Center of gravity is thrown back into an arch Phase 3 – Angular momentum allows center of gravity to pass over head/hands Phase 4 – Center of gravity is returned to starting position

15. Full Twist: Frictional force creating torque along the longitudinal axis.

16.  Standing vs. Running Approach  Round off H = I  = mk 2 

18.  Which position reduces the moment of inertia?