The aim of this study was to examine physiological differences of aerobic capacities between U 18 a nd U 20 rowers. Methods: The sample of participants included 9 junior level rowers (mean age was 17.88 ± 2.85 years, body mass 86.18 ± 7.83 kg, body height 185.14 ± 6.93 cm, and body fat percentage 12.69 ± 1.92). Participants performed a test on a rowing ergometer, until volitional exhaustion to measure VO2max with substrates utilization being measured continuously. Also, anthropometric characteristics were analysed. The sample of variables included body mass, body height, O2 Volume, Ventilation, Tidal Volume, maximal oxygen consumption, Oxygen pulse, and Power output (PO). Results and discussion: Results showed that U 18 rowers have a significantly higher VO2max (54.29 ± 4.23) than U 20 individuals (46.89 ± 2.90). This finding can be explained through several factors, including possible individual differences in biological maturation, cumulative fatigue and influence of motivation during testing. Conclusion: These results emphasize the aerobic performance development in young rowers and highlights the need for adequate training programme considering age related differences.
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