RESUMEN
Forty-two trained and untrained young Chinese subjects of both sexes were employed for this study. Maximal oxygen uptake and anaerobic threshold were measured with the Beckman Metabolic Measurement Cart (MMC) during incremental work test. Skinfold thickness was measured using a skinfold caliper. Body density was calculated with skinfold thickness according to the formula of Suzuki et al (1975). % fat was calculated with the equation given by Brozek et al (1963). % fat of trained subjects was significantly lower than untrained subjects in both sexes. Maximal aerobic power of trained subjects was greater than untrained subjects in both sexes. VO2 at "AT" in trained subjects was greater than untrained subjects in both sexes. Anaerobic threshold might be a valid and useful physiological index for evaluation of physical fitness in various subjects.