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The purpose of this study was to compare skating economy and oxygen uptake (VO₂) on-ice and on the skating treadmill (TM). Male varsity hockey players (n = 15, age = 21.0 yr) performed skating tests on a TM and on-ice. The subjects skated for 4 min at each of 3 submaximal velocities (18, 20, and 22 km • h⁻¹), separated by 5 min of passive recovery. A VO₂max test followed the submaximal tests and commenced at 24 km • h⁻¹ with the velocity increasing by 1 km • hr⁻¹ every minute until volitional fatigue. VO₂ was 39.7, 42.9, 46.0, and 53.4 ml • kg⁻¹ • min⁻¹ at 18, 20, 22, and maximum speed (km • hr⁻¹) on the TM. VO₂ was significantly lower (p < .05) 31.5, 36.9, and 42.7 ml • kg⁻¹ • min⁻¹ at 18, 20, and 22 km • h⁻¹ on-ice. The on-ice VO₂max (54.7 ml • kg⁻¹ • min⁻¹) was similar to TM. Stride rate, stride length and heart rate (HR) were significantly different on-ice compared to TM. These results …