BASIC BIOMECHANICS
8th Edition
ISBN: 9781259913877
Author: Hall
Publisher: RENT MCG
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Textbook Question
Chapter 5, Problem 7IP
How is flexibility related to the likelihood of injury?
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What is neuromuscular efficiency and synergistic dominance? How do these terms relate to “good” and/or “altered” posture?
ney:
Load (L) = 5 kgs
= Effort
E = Fulcrum
Weight of forearm = 1.8 kgs
L = Load
Biceps brachii
muscle
Distance of load from elbow joint = 35 cm
%3D
Effort (E) = contraction
of biceps brachii
Distance of center of mass of forearm from elbow = 17 cm
Distance of tendon from elbow = 4 cm
A) Draw the free-body diagram to represent the forces and moments
Load (L) = weight of
object plus forearm
B) Write the torque equation for static equilibrium
Fulcrum (F) = elbow joint
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Chapter 5 Solutions
BASIC BIOMECHANICS
Ch. 5 - Prob. 1IPCh. 5 - Describe the directions and approximate ranges of...Ch. 5 - Prob. 3IPCh. 5 - Prob. 4IPCh. 5 - What factors contribute to flexibility?Ch. 5 - Prob. 6IPCh. 5 - How is flexibility related to the likelihood of...Ch. 5 - Prob. 8IPCh. 5 - Explain why grip strength diminishes as the wrist...Ch. 5 - Why is ballistic stretching contraindicated?
Ch. 5 - Prob. 1APCh. 5 - How is articular cartilage similar to and...Ch. 5 - Prob. 4APCh. 5 - Discuss the relative importance of joint stability...Ch. 5 - What specific exercises would you recommend for...Ch. 5 - What specific exercises would you recommend for...Ch. 5 - Prob. 8APCh. 5 - Prob. 9APCh. 5 - What exercises would you recommend for senior...
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- Isometric exercise is best described as applying a force O a) with movement through a full and complete range of motion O b) while a muscle is lengthening and returning to a resting position c) without any change in length of the muscle O d) at a constant speedarrow_forwarddemonstrate an understanding of and assess factors that affect performance during human movement.arrow_forwardIs there a difference in the fatigue rate of the dominant hand vs. the other hand?arrow_forward
- Gait training occurs after a lower extremity amputation as a part of the rehabilitation process. What is gait training?arrow_forwardDescribe the overall “big picture” view of how movement occurs?arrow_forwardYou are at the gym and doing strength training. You feel in good shape and should try to break personal records in squats. You place the bar on your back and begin to take in, that is, your motor neurons begin to send action potentials through all your motor units to the thigh muscles. What is the contraction called when you a) bend down and b) are in good shape and can generate more force than the bar weighs c) stay standing in one and the same position without being able to push yourself up in a standing position?arrow_forward
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