Figure 3From: Minute ventilation and heart rate relationship for estimation of the ventilatory compensation point at high altitude: a pilot studyExercise V ˙ E / HR relationship in all subjects. Exercise V ˙ E / HR response in the six subjects studied at SL (circle) and at HA (square)at free will (empty symbol) and with effort (filled symbol). The black arrow indicates VCP; the white arrow indicates the θL (see text for further comments).Back to article page