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THE METABOLIC COST OF SLOW GRADED TREADMILL WALKING WITH A WEIGHTED VEST IN UNTRAINED FEMALES

By: James J. Mc Cormick

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Introduction: For beginning exercisers or those with conditions that limit walking speeds, modifications to walking programs are needed to facilitate cardiorespiratory improvement. 
Purpose: To examine how oxygen consumption (VO2), relative exercise intensity (percentage of age predicted heart rate maximum) (REI), and rating of perceived exertion (RPE) are affected while using a weighted vest during slow inclined treadmill walking. 
Methods: Thirteen untrained women (37±11.2 yr, 69.1±14.4 kg, 30.6±7.4% body fat)  performed a standardised walking trial (4-min stages at 0, 5, 10, and 15% gradients) on a treadmill at a constant 1.12 m/s under three weighted vest conditions (0, 10, and 15% of body mass (BM)). VO2 and heart rate were measured continuously throughout each bout. RPE was recorded at the end of each minute.