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Other Subject Area

Applied exercise science

Abstract

International Journal of Exercise Science 18(2): 864-880, 2025. Optimizing bike position is essential for enhancing cycling performance, improving comfort, and reducing injury risk. This study examined the acute effects of a bike fit using the idmatch® system on power output, rate of perceived exertion (RPE), and discomfort in recreational cyclists. Twelve participants (10 males, 2 females; 37.0 ± 9.4 years) underwent an idmatch system bike fit, which employs three-dimensional motion capture to optimize rider position. Cyclists completed a six-second peak power test (PPT6) and a 20-minute functional threshold power (FTP) test before and after the fit. Performance metrics (power, cadence, and torque) and subjective measures (RPE, discomfort and region-specific pain) were recorded. Post-fit, peak power during the PPT6 test was 8.6% higher (pre: 952.1 ± 268.2 W; post: 1033.6 ± 263.6 W; p = 0.043). In the post-fit FTP test, average power output (pre: 190.0 ± 50.0 W; post: 198.7 ± 47.8 W; p = 0.047) and torque (pre: 15.6 ± 3.5 ft-lb.; post: 16.6 ± 2.2 ft-lb.; p = 0.035) were increased, while RPE (p = 0.029) and discomfort (p = 0.035) were decreased compared to pre-fit values. Performance improvements in both tests were positively correlated with the magnitude of saddle-to-handlebar distance adjustment (p < 0.05). Self-reported hand, foot, and hamstring pain trended lower following the bike fit (all: p = 0.125). These findings suggest that optimizing bike configuration using the idmatch system acutely improves power production and reduce discomfort in recreational cyclists. Motion-capture-based fitting systems may offer a practical solution for enhancing cycling performance.

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