1. Busuttil CP, Ruhling RO (1977) Warm-up and circulorespiratory adaptations. J Sports Med 17: 69?74
2. Caiozzo VJ, Davis J, Ellis JF, Azus JC, Vandagriff R, Prietto CA, Mc Master WC (1982) Comparison of gas exchange indices used to detect the anaerobic threshold. J Appl Physiol Respirat Environ Exercise Physiol 53: 1184?1189
3. Davis JA, Frank MH, Whipp BJ, Wasserman K (1979) Anaerobic threshold alterations caused by endurance training in middle aged men. J Appl Physiol Respirat Environ Exercise Physiol 46: 1039?1046
4. Genovely H, Stamford BA (1982) Effects of prolonged warm-up exercise above and below the anaerobic threshold. Eur J Appl Physiol 48: 323?330
5. Gutin B, Stewart K, Lewis S, Kruper J (1976) Oxygen consumption in the first stages of strenous work as a function of prior exercise. J Sports Med 16: 60?65