This study analysed the potential influence of crew size on performance (stroke rate, strokes/min; distance travelled, m/min; and average power, W), physiological responses (post-exercise heart rate and heart rate measured three minutes after exercise) and perceptual responses (Borg scale). A total of 136 adolescent athletes (100 males and 36 females; mean age = 15.79 ± 1.14 years) performed four three-minute maximal-effort trials on a rowing ergometer across four conditions: individual trials (C1), two-person crews (C2), four-person crews (C3), and eight-person crews (C4). Results showed a significant increase in stroke rate (strokes/min) in both sexes as crew size increased (C1 33.16 ± 2.54 vs. C4 34.19 ± 2.21 strokes/min; C1-C4 p = 0.01; C2-C4 p = 0.003). Men reported greater perceived exertion in C1 compared with C4 (Borg 7.80 ± 0.79 vs. 7.46 ± 0.74; p = 0.032), despite no associated changes in performance (863.88 ± 45.10 vs. 863.26 ± 47.63 m/min) or average power (311.71 ± 46.43 vs. 311.44 ± 50.43 W), whereas no differences in perceived exertion were observed in women (Borg 7.59 ± 0.84 vs. 7.56 ± 0.76). Cardiovascular responses were similar across sexes and experimental conditions. In summary, these preliminary findings could point toward the existence of sex-differentiated patterns. The data appear to suggest a more pronounced tendency toward the `crew-size effect` among the men in the sample, whereas an inclination toward maintaining individual responsibility is observed in the women.
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