Issn Print: 0195-9131

Publication Date: 1997/05/01


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EFFECTS OF DEEP WATER AND TREADMILL RUNNING ON OXYGEN UPTAKE AND ENERGY EXPENDITURE IN SEASONALLY TRAINED CROSS COUNTRY RUNNERS 1264

J. DeMaere; B. C. Ruby; J. Swan

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Excerpt

This study compared submaximal intensity deep water and treadmill running in seasonally trained male cross-country runners (n=8). Subjects completed dry land treadmill (TMR) and deep water running (DWR) trials at a heart rate of 60% and 80% dry land treadmill peak oxygen consumption. Oxygen consumption(VO2), ventilation (VEstpd), energy expenditure(Kcal·min-1) and respiratory exchange ratio (RER) were measured during each steady state stage (5 min) for both trials. The main effect of trial demonstrated a significantly higher RER during DWR (p=0.0002). The trial x intensity interaction for VEstpd was significant (p=0.007) demonstrating a difference between trials at 80% VO2max. VO2, RPE and energy expenditure did not differ between trials.Table
Because VO2 and energy expenditure were the same during treadmill and deep water running, the overall active muscle mass appears similar between the two modes. However, the elevated VEstpd and RER during DWR indicates an altered pattern of muscular recruitment for the upper and lower extremities, particularly at a higher exercise intensity. Although deep water running is a popular training modality during injury rehabilitation and appears to elicit similar rates of energy expenditure compared to treadmill running, the concepts of training specificity should be further considered.
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