Miguel Indurain

At his prime, champion cyclist Miguel Indurain had a resting heart rate of just 28 beats per minute. The heart rate of an average human is 60-90 beats per minute. His blood took seven liters of oxygen around his body per minute, compared to 3–4 liters for an ordinary person and 5–6 liters for fellow riders. His cardiac output was 50 liters a minute; a fit amateur cyclist's is about 25 liters. Indurain's lung capacity was 7.8 liters, compared to an average of 6 liters. His resting pulse was as low as 28 BPM, compared to an average 60–72 bpm, which meant his heart would be less strained in the tough mountain stages.