Exercise devices – Having specific electrical feature – Monitors exercise parameter
Patent
1991-10-15
1993-09-07
Bahr, Robert
Exercise devices
Having specific electrical feature
Monitors exercise parameter
482 54, 7337901, A63B 2202, A63B 7100
Patent
active
052423395
ABSTRACT:
Method and apparatus for accurately simulating locomotion in a weightless environment, specifically to prevent atrophy of a subject's musculoskeletal and cardiorespiratory systems during space travel, are disclosed. Forces, including the vertical, horizontal and lateral force generated by an individual during locomotion on a treadmill, utilizing a rigid belt with rigid transfer elements supported by low friction bogies are measured by strain gauges sensitive in their respective direction. The vertical forces produced by securing the subject to the treadmill via bungee cords in conjunction with the measured velocity of the treadmill, and the mode of locomotion are used to determine the subject's equivalent weight. The other horizontal and lateral forces are used to determine the external work produced by the subject when locomotion is performed on a nonlevel surface with an effective grade angle. The measured forces are related in such a way that the grade angle is easily determined. A motor and additional circuitry can be added to the apparatus to measure and force a subject to maintain a predetermined work rate associated with a preselected grade angle and tread velocity.
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Bahr Robert
Barr Hardie R.
Fein Edward K.
Leubecker John
Miller Guy M.
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