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To analyze the intra- and inter-instrument reliability of the ActiGraph GT3X accelerometer using a vibration table on each orthogonal axis and at five frequencies of motion. Ten GT3X units were subjected to a specific vibration using a motorized vibration table along the vertical, horizontal right–left and horizontal front–back axis, and at 1.1, 2.1, 3.1, 4.1 and 10.2Hz. The 5min data for each frequency...
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