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ATTR 362: Muscular Strength and Endurance

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by

Jess Edler

on 29 September 2015

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Transcript of ATTR 362: Muscular Strength and Endurance

Muscular Strength and Endurance
Structure
Function
Sliding Filament Theory
All-or-none Principle
Action potential >> motor neuron fires >> muscle fibers contract (sliding filament)
Motor units will fire at the same time
The more motor units recruited, the stronger the muscles response
PADLET DEFINITIONS
1. Irritability
2. Contractility
3. Viscosity
4. Extensibility
5. Stiffness
6. Contracture
7. Fatigue
8. Summation
IN YOUR OWN WORDS
define the term and explain the significance
Types of Muscle Fibers
Slow-twitch fibers
Type I
Slow oxidative
Endurance
Postural Muscles
Fast-twitch fibers
Type II
Fast Oxidative/glycolytic
Quick, forceful contractions
Power, explosive muscles

Strength:
maximum force a muscle or muscle group can exert
Power:
strength applied over a distance for a specific amount of time. P = Fd/T
Endurance:
ability of a muscle or muscle group to perform repeated contractions against a less-than-maximal load
Relationship Between Strength and Endurance
Types of Muscle Activity
Static:
Isometric
Dynamic:
Isotonic
Concentric
Eccentric
Isokinetic
Open and Closed Kinetic Chain Activities
Open Kinetic Chain (OKC):
distal segment moves freely
Closed Kinetic Chain (CKC):
distal segment is weight bearing
Padlet Challenge
List 2 OKC and 2 CKC exercises
Strengthening Principles
S
pecific exercises
N
o pain
A
ttainable goals
P
rogressive overload
S
pecific Exercises
S
pecific
A
daptations to
I
mposed
D
emands
Muscle will adapt to the demands placed on it
Low weight, high reps = endurance
High weight, low reps = strength
Exercises should mimic stresses during functional activity
N
o Pain
Progress within patients' tolerance.
Pain = too difficult/too much
A
ttainable Goals
Challenging but attainable
P
rogressive Overload
To continue to produce strength gains, the load must progressively increase.
Exercise Progressions
DeLorme and Watkins
Oxford Technique
DAPRE System
Review these on your own!
ACTIVITY
Full transcript