1. Burke, E. J., Franks, D. B.: Changes in $$\dot V$$ O2 max resulting from bicycle training at different intensities holding total mechanical work constant. Res. Quart. Amer. Ass. Hlth. Phys. Educ. 46, 31?37 (1975)
2. Crews, T. R., Roberts, J. A.: Effects of interaction of frequency and intensity of training. Res. Quart. Amer. Ass. Hlth. Phys. Educ. 47, 48?55 (1976)
3. Damato, A. N.: Hemodynamic response to treadmill exercise in normal subjects. J. Appl. Physiol. 21, 959?966 (1966)
4. Davis, J. A., Vodak, P., Wilmore, J. H., Vodak, J., Kurtz, P.: Anaerobic threshold and maximal oxygen uptake for three modes of exercise. J. Appl. Physiol. 41, 544?550 (1976)
5. Davies, C. T. M., Knibbs, A. V.: The training stimulus: The effects of intensity, duration and frequency on max aerobic power output. Int. Z. Angew. Physiol. 29, 299?304 (1971)