ABSTRACT
The physiological responses of normal walking and walking on a dual action treadmill which incorporates arm exercise were compared in 29 men and 37 women. Subjects completed six, 5-min steady-state exercises at 2.0, 3.0, and 4.0 mph (0.89, 1.34, 1.79 m.s-1) and 3% incline with and without arms. Estimated METs calculated according to the ACSM equations were compared with the actual METs. The men's ventilation (VE), and VO2 (l.min-1, ml.kg-1.min-1, and METs) were significantly (P < 0.001) higher at all speeds and for both conditions than the women's. There were no gender differences (P > 0.05) in heart rates (HR), respiratory exchange ratio, and ratings of perceived exertion (RPE) for each condition. The arm conditions yielded significantly (P < 0.001) higher responses at each speed for VE, l.min-1, ml.kg-1.min-1, METs, RPE, and HR. Although there were no significant (P < 0.05) differences in HR between men and women for each condition, the relationships between ml.kg-1.min-1 and HR differed. The actual METs obtained during the arm conditions were significantly (P < 0.05) higher than those estimated for both the men and women at all speeds. It was concluded that using the arms while walking on a dual action treadmill increases the energy costs an average of 55% above normal walking.
Subject(s)
Arm/physiology , Energy Metabolism/physiology , Leg/physiology , Walking/physiology , Adolescent , Adult , Equipment Design , Exercise Test/instrumentation , Female , Heart Rate/physiology , Humans , Male , Middle Aged , Oxygen Consumption/physiology , Perception/physiology , Physical Exertion/physiology , Pulmonary Gas Exchange/physiology , Respiration/physiology , Sex CharacteristicsABSTRACT
Alpha coefficients of internal consistency for the Short Forms of the Work Environment Scale and Ward Atmosphere Scale, their major dimensions and their subscales are presented. Although some exceptions were noted, the indices reported here attest to the adequate reliability of the short forms of the two scales, which was previously documented for the unabridged forms. The few exceptions are hypothesized to be attributable to either sampling error or the fact that each factor is comprised of only 4 items. The need for further reliability testing of these short forms is emphasized.
