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Lecture 6

BPK 142 Lecture Notes - Lecture 6: Gastrocnemius Muscle, Triceps Surae Muscle, Erector Spinae Muscles


Department
Biomedical Physio & Kines
Course Code
BPK 142
Professor
Mike Walsh
Lecture
6

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BPK 142 – INTRODUCTION TO KINESIOLOGY MIDTERM
BIOMECHANICS
Biomechanics
I. Uses of Biomechanical Analyses
-
-
-
- 
-
-!"
Qualitave analysis#$"!""!% ""
!"
Quantave analysis&'"!"""
"% ""!
II. Levers of the Human Body()*
-+
oForce point,"
!
oResistance point
+ -!".
oFulcrum.
//""

00""

First Class Lever
-/!"
-1.+!
o/21!
o/234.
!4
o02 -
Second Class Lever
-0!"
-1.5!
o/25
o/25""
o025!.
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Third Class Lever
-/!"
-&!"4!
""""""

-1.6"7.!
o/21!
o/2!"!
o02 -
Principle of Levers!
/./80.0
F x FA = R x RA
Mechanical advantage of a lever
-0/0""
9
-Force lever5/04"
:"
-Speed lever50/4""
:
MA = FA/RA
Mass (kg);<"!
Force (N) = Mass x Gravity
1 N = (1 kg) (1 m/s2)
Weight (N)."!"
Weight = Mass x Acceleraon of gravity = mag
8=%>)?@
"=%>)#
Torque (N/J)""""A.
9
Muscle torque = F x FA
Resistance toque = R x RA
-+!
Moment arm""!A".
Volume!"
Pressure (N/cm2) /"!"
P = F/A
Compression'".!"
Tension".!"
2
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