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Fig. 2 | BMC Sports Science, Medicine and Rehabilitation

Fig. 2

From: Validity of treadmill- and track-based individual calibration methods for estimating free-living walking speed and VO2 using the Actigraph accelerometer

Fig. 2

Prediction error of VO2 on the free-living walks for the treadmill- and track-based calibration methods. Figure 2 shows the relationship between mean prediction error for VO2 (ml · kg−1 · min−1) and actual walking speed (km · h−1) on the free-living walks for the treadmill- (left) and track-based (right) calibration methods. Dashed lines are 95 % confidence intervals

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