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Biomechanical Analysis: Back Tuck

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Gabriel Gonzalez

on 11 December 2013

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Transcript of Biomechanical Analysis: Back Tuck

Biomechanical Analysis: Back Tuck
By: Gabriel Gonzalez
Back tuck: a complete rotation of the body
while in mid air, with hips passing over
the head, without hands touching the floor.

How to do a Back Tuck
Step 1: Keep feet together, hands extended above head
Step 2: Bend knees, swing arms down toward legs to iniate power of tuck
Step 3: Swing arms back up as you explode off the ground, lifting arms toward the ceiling
Step 4: Keep body straight til maximum height is reached
Step 5: Pull knees toward center to iniate rotation
Step 6: Land on both feet with knees slightly bent do absorb impact
During take off and landing the quadriceps and gluteal muscles create the most power.
Gluteus Maximus is the main pushing muscle of the gluteal muscles

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

The abdominals contract to pull the legs and pelvis over the top

Muscles of the arms, chest, and back work together to complete rotation
point around rotation
distance from COM to furthest point on your body
Angular Momentum
the amount of power behind your rotation
Angular Velocity
speed of rotation
Potential Energy
the energy of a body or a system with respect to the position of the body

Kinetic Energy
the energy of a body or a system with respect to the motion of the body
Newtons Laws
1st Law- An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force
2nd Law- The acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object (Force= Mass x Acceleration)
3rd Law- For every action, there is an equal and opposite reaction

Step 1
Newton's 1st Law
Normal Force (mass of object x gravity)
Step 2
The gymnast must put themselves in motion
Own body
Energy obtained by muscles (Hooke's Law)
Muscles contract like coiled spring
Potential energy
Step 3
Potential Energy is stored energy
Muscles expand creating Kinetic Energy
No regular jump will do
Push-off Force > Normal force
Will cause acceleration
Newtons 2nd Law (Force= Mass x Acceleration)


Gymnast's Mass: 60 kg
Normal Force= Mass x Gravity=
(60 x 9.81)= 588.6 N
Push off: 600 N
Acceleration=Force/Mass= 600N/60kg
=10 m/s^2
Step 4
Newton's 3rd Law
Gymnast push force > Normal force
Floor pushes back
Step 5
Angular Velocity
Swinging arms
Rotational rate
Speed up angular velocity
All of these components of physics were necessary to perform one single back tuck. Physics is a way of life. It helps explain how and why everyday things happen. Even everyday things such as a back tuck.
Step 6
Full transcript