Page 82 - Color_Atlas_of_Physiology_5th_Ed._-_A._Despopoulos_2003

D. Active and passive components of muscle force (skeletal muscle)
100

muscle
Muscle force (% of maximum force) Active Passive Mechanical Features of Skeletal Muscle II
force
resting tension
force
Relative
0 muscle length
80 90 100 (length at max.
force = 100%)
1.6 1.8 2.2 Sarcomere length (µm)

E. Length-force curve for skeletal and cardiac muscle
1 Striated muscle 2 Cardiac muscle

Total force Plate 2.15
working range
Total force
200
200
% of maximum active force 100 Active Normal Resting % of maximum active force 100 Normal working range Resting
tension
force
force
Active
force
tension
force
0
65 100 135 0 80 100 120
Relative muscle length Relative muscle length
(length at max. force, L max =100%) (length at max. force, L max =100%)
F. Muscle force (or load) and shortening velocity
1
100 Maximum velocity (V max )
2
light
Shortening velocity (% of V max ) small load Shortening Slow Time
Fast
Power with
Load
heavy
large load

0
Load = muscle force 69

Despopoulos, Color Atlas of Physiology © 2003 Thieme
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