Isotonic
Constant load
Isokinetic
Constant velocity
Household walker
0-0.4 m/s
Limited community ambulator
0.4-0.8 m/s
Community ambulator
0.8-1.2 m/s
Normal walking speed and able to cross streets
1.2-1.4 m/s
Motor impersistence
Inability to sustain a voluntary act
Associated with Huntington Disease
Uthoff’s phenomenon
An increase in body temperature can result in reduction of vision