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Running performance of top class endurance athletes but also of recreational and non-specifically trained physically active individuals depends on the maximum aerobic metabolic rate and the energy cost of a unit of running distance (1, 5, 6, 7, 11, 12, 16, 29). There is evidence that elite runners have better running economy (RE) than good and less capable runners (13, 26), and that in untrained individuals RE improves if they take on running exercises (2). However, some other studies reported that RE is essentially the same in sedentary and athletic subjects (9, 11, 31) and independent of running velocity if air resistance can be neglected such as during running on the treadmill (11, 14, 18, 20, 21, 27). In contrast, other studies reported an increase in oxygen uptake (CV̇ O2) or aerobic energy expenditure (CAER) per unit of running distance with increasing relative intensity (8, 13). Prof. Dr. Ralph Beneke Department of Medicine, Training and Health, Institute of Sports Sciences and Motology, Philipps University Marburg Jahnstraße 12, 35037 Marburg, Germany : ralph.beneke@staff.uni-marburg.de SCHLÜSSELWÖRTER: Terrestrische Fortbewegung, Mensch, Geschwindigkeit, Aerob, Anaerob

Energy Cost of Running Related to Running Intensity and Peak Oxygen Uptake