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Figure 1 Comparison of measures of submaximal exercise during active and inactive pacing. Significant increases were observed in the distance walked in 6 min (meters, p = 0.001) and anaerobic threshold (AT, ml/kg/min, p = 0.02) during active pacing. A significant improvement was observed in the minute ventilation/ventilated carbon dioxide (VE/VCO₂, p = 0.03). Black bars= randomization; vertically lined bar = inactive pacing; horizontally lined bar = active pacing.