A method for enhanced exercise training or performance utilizing intentional controlled tachypnea and somatic sensory alkalosis biofeedback training to maintain an essentially non-acidic state during exercise. A trainee is instructed to decrease measured transcutaneous CO2 levels by increased ventilation and to correlate measured transcutaneous CO2 levels with subjective somatic symptoms. Studies under exercise conditions measure the intensity of exercise correlating to an onset in blood acid accumulation in the trainee and such level of intensity is in turn correlated with a predetermined heart rate. The trainee is then instructed to use heart rate and somatic sensory changes as a guide to the need for increased ventilation to lower blood CO2. In another embodiment, the method of the instant invention utilizes intentional controlled tachypnea to increase maximum breath holding time.