Predicting external ischial tuberosity width for both sexes to determine their bicycle-seat sizes

摘要

Previous studies have investigated the measurement of the external ischial tuberosity width (EITW) for bicycle seat design. In this study, the EITW values, as well as the anthropometric data, were obtained from 30 men and 30 women to develop the EITW prediction models separately for the men and the women by multiple stepwise regression analysis. The models were then validated by the data from another 8 men and 8 women. The results show that sex difference in EITW measurements was observed (male:12.0 cm; female:13.6 cm). Hip circumference is an effective predictor for EITW values with percentages of explained variances of 64.1% for male and 61.2% for female. The validation result also shows that there was no significant difference between the measured and the predicted EITWs for both sexes. Relevance to industry: Previous method of measuring the EITW has generally employed the impression method, however, the method was limited by equipment restrictions or complex procedures. The predictive model established in this study is a simple and valid method for acquiring EITW values to assist riders to determine their seats for bicycling. (C) 2018 Elsevier B.V. All rights reserved.