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Experimental time line. After resting measurements were obtained, subjects completed 7 min of exercise at 5, 10, and 15% workloads (21 min total). Subjects performed a 2-min cold pressor test at rest and during the last 2 min of each workload. A control exercise protocol was identical, except for cold pressor tests. Hemodymanic values were obtained at minutes 4 and 6 during each workload (arrows).
