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Studies of the body cost of work performance under different postural conditions
Results and discussion
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12 subjects 15-inch chair 24-inch stool 24linch 36-inch counter 36linch 9 selected subjects activities Analysis of variance angle of arm angle of underarm angle readings arm lift basal metabolic rate body mechanics body weight Calories per hour Calories per minute cardiac output centered cost for sitting cost for standing counter 36 counter surface different postural conditions effects energy expenditure fatigue ﬁgures ﬁrst ﬂoor forced to side gross energy cost Group I-a groups of subjects homemakers household tasks kilogram knees forced knees under counter knees under knees Mean angle measured medium stool number of frames number Subject number oxygen consumption oxygen record Passmore and Durnin quiet standing Reach to side respiratory quotient rising and reseating Seated throughout test separate trials side 36 signiﬁcant sitting and standing standardized tasks Swartz Table test period towels folded Trial number Subject underarm lift values varying number worker Yes 16 F