Download Applied Biomechanics Project

Thomas Keefer, Timothy Harris, Christopher Thornton, Victoria Neisius, Alina Sherman
Applied Biomechanics Group Project
KINS 386- Dr. Blain Harrison
Monday, November 24, 2014
1. Movement Description Analysis
A) Glenohumeral | Abduction | Frontal Plane | Anteroposterior axis
B) Tibiofemoral | Extension | Sagittal Plane | Mediolateral axis
C) Femoroacetabular | Flexion, External Rotation, Adduction | Sagittal, Transverse, & Frontal
Planes (Tri-planar) | Mediolateral & Anteroposterior axes
D) Intervertebral | Flexion | Sagittal Plane | Mediolateral Plane
E) Talocrural | Eversion, Plantarflexion | Transverse & Sagittal Planes | Longitudinal &
Anteroposterior axes
2. Kinetic Analysis
A) A ground reaction force is acting at the non-kicking foot to push up on the non-kicking foot
into dorsiflexion.
B) A friction force is acting at the non-kicking foot to pull the non-kicking foot into knee
extension.
C) A fluid resistance force is acting at the whole body to push the whole body into extension.
D) An inertial force is acting at the upper leg to push the lower leg into extension
E) A muscle force is acting at the rectus femoris to pull the lower leg into extension.
3. Linear and Angular Kinematics Analysis
A) Linear velocity of leg (& therefore ball)- 0.74 meter/ .083 second = 8.92 meters/second
B) Angular velocity of knee joint- 158.4 degrees / .083 second = 1,908.4 degrees/second
C) Kinetic Energy generated within the kicking leg198 lbs = 89.8 kg (1 kg = 2.2 lbs)
Mass of one leg = 1/5 of 89.8 kg = 17.96 kg
K.E. = ½(17.96 kg)(8.92m/s)2
K.E. = 714.51 joules
D) Force generated by legmass ∙ acceleration
17.96 kg ∙ (velocity/time)
17.96 kg ∙ 107.5 m/s2
Force = 1,930.2 Newtons
E) Momentum generated by legmass ∙ velocity
17.96 kg ∙ 8.92 m/s
Momentum = 160.2 kg ∙ m/s
4. Lever Analysis
A) Tibiofemoral- rectus femoris. The rectus femoris through the patella tendon speeds up the
tibiofemoral joint through a concentric contraction.
B) The class of lever created at the Tibiofemoral joint is a third class lever with the fulcrum
being the joint itself.
C) The effort arm is the distance from the tibiofemoral joint and the patella tendon.
D) The resistance arm is the distance from the tibiafemoral joint and the talocrural joint.
5. Functional Anatomy Analysis
A) The soccer kick is an open-kinetic chain activity because the leg is swinging in a pendulum
motion.
B) The rectus femoris in knee extension acts as an agonist when the foot kicks the ball.
C) The origin of the rectus femoris is the anterior superior iliac spine of pelvis and the insertion
is tibial tuberosity via patella tendon. Because it is an open kinetic chain activity, the mechanical
insertion and origin matches the anatomical insertion and origin.
D) The biceps femoris in knee extension acts as an antagonist when the foot kicks the ball.
E) The origins of the biceps femoris are the ischial tuberosity of pelvis and the posterior femur.
The insertion of the biceps femoris is the head of the fibula. Because it is an open kinetic chain
activity, the mechanical insertion and origin matches the anatomical insertion and the origin.