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This study examined the effects of two resistances, or “drag factors” on selected physiological variables during incremental progressive rowing tests (seven 3-min stages) on a Concept2® ergometer. Subjects were seven male and seven female university club rowers. Their mean age, body mass and height were 19.6±1.5 years, 72.7±8.0 kg, and 172.2±7.5 cm, respectively. Progressive tests were conducted using drag factors 100 (D 100) and 150 (D 150) before the spring racing season. Values were determined for the following physiological variables: ventilation (V· E), oxygen uptake (V· O 2), heart rate (HR), blood lactate concentration (BLC), respiratory exchange ratio (R) and rowing economy (W/V· O 2). Comparisons across all six submaximal stages showed no significant difference between D 100 and D 150 for any of the variables measured (p>. 05). Maximal V· Emax was significantly greater at D 100 than D …