title: Influence of saddle height on lower limb kinematics in well-trained cyclists: static vs. dynamic evaluation in bike fitting.
abstract: In cycling, proper saddle height is important because it contributes to the mechanical work of the lower limb joints, thus altering pedaling efficiency. The appropriate method to select optimal saddle height is still unknown. This study was conducted to compare a static (anthropometric measurements) vs. a dynamic method (2D analysis) to adjust saddle height. Therefore, an examination of the relationship between saddle height, anthropometrics, pedaling angles, and hamstring flexibility was carried out. Saddle height outside of the recommended range (106-109% of inseam length) was observed in 56.5% of the subjects. Inappropriate knee flexion angles using the dynamic method were observed in 26% of subjects. The results of this study support the concept that adjusting saddle height to 106-109% of inseam length may not ensure an optimal knee flexion (30-40°). To solve these discrepancies, we applied a multiple linear regression to study the relationship between anthropometrics, pedaling angles, and saddle height. The results support the contention that saddle height, inseam length, and knee angle are highly related (R = 0.963, p < 0.001). We propose a novel equation that relates these factors to recommend an optimal saddle height (108.6-110.4% of inseam length).
authors.affiliation: Performance and Health Research Group for High-Level Sports (GIRSANE), High Performance Center (CAR), Sant Cugat del Vallès, Spain. vferrer@car.edu
authors.forename: Ventura
authors.initials: V
authors.lastname: Ferrer-Roca
authors.forename: Andreu
authors.initials: A
authors.lastname: Roig
authors.forename: Piero
authors.initials: P
authors.lastname: Galilea
authors.forename: Juan
authors.initials: J
authors.lastname: García-López
mesh_terms: D000293:Adolescent; D000328:Adult; D001642:Bicycling / Q000502:physiology*; D001696:Biomechanical Phenomena; D049628:Body Size; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D016014:Linear Models; D035002:Lower Extremity / Q000502:physiology*; D008297:Male; D055641:Mathematical Concepts; D009068:Movement; D019876:Sports Equipment; D055815:Young Adult