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Measurement of Exercise Intensity with a Tri-Axial Accelerometer during Military Training.

机译:军事训练期间三轴加速度计测量运动强度。

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摘要

Exercise load and intensity, as reflected in energy expenditure, are determinants of performance. Here, we evaluated a newly developed tri-axial accelerometer for movement registration (Directlife, Philips Research, Eindhoven, The Netherlands) for the assessment of exercise intensity and exercise load at high-intensity field training. Subjects were 16 well-trained men with a mean (SD) age of 24 3 y and body fat of 15.8 2.1 %. Physical activity was monitored continuously with accelerometers for a twelve-day interval while total energy expenditure was measured simultaneously with the doubly labelled water technique. Subjects did wear three accelerometers, 3 x 3 x 1 cm and 13 g each, at three different locations, trouser pocket, waist belt and breast pocket. Accelerometer output was stored over one-minute intervals and loaded to a computer at the end of the training interval. Urine samples were collected at baseline, before drinking the doubly labeled water as a last drink of the day, on the subsequent day and at further four-day intervals. Urine samples were analyzed with Isotope Ratio Mass Spectrometry. There was a significant body weight loss of 2.0 1.4 kg.

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