In the preparation phase I am contracting my lower body muscles, this means that I am using my Hips, Knees and Ankle joints in this phase. I used my knee joints other wise known as a hinge joint. When flexing my knees, my agonist [hamstring] and my quadriceps are my antagonist.
The ankle joint is a hinge/plane joint which is Dorsiflexing, which is caused by the tibialus anterior being the agonist and the gastrocnemius being the antagonist.
The hip joint is a ball and socket joint, the hip is flexing because i am in a stance and all my joints a flexing, which is caused by quadriceps being the agonist the gluteus maximus being the antagonist.
The differences i can see are my knees haven't bent down/flexed as much as the example on the left and my elbows are flexed too much so the ball looks like its touching my forehead.
In the preparation phase balance and stability is important when performing a sporting movement. Line of Gravity is defined as the direction of the force of gravity through the body is downward, towards the center of the earth and throughout your center of gravity. My line of gravity is located through the middle of my body and in between my feet, therefore i am set to be stable.
Base of support is defined as how stable you are through your feet, if you are on all fours you will have even better base of support.I can see that i am stable because i have two feet on the ground.
The differences/similarities I can see in my balance and stability compared to the ideal are pretty similar i don't think i had any problems for my balance and i was pretty stable throughout the whole preparation phases.
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