title: Effect of a novel pedal design on maximal power output and mechanical efficiency in well-trained cyclists.
abstract: In this study, we evaluated the effects of a novel pedal design, characterized by a downward and forward shift of the cleat fixing platform relative to the pedal axle, on maximal power output and mechanical efficiency in 22 well-trained cyclists. Maximal power output was measured during a series of short (5-s) intermittent sprints on an isokinetic cycle ergometer at cadences from 40 to 120 rev min(-1). Mechanical efficiency was evaluated during a submaximal incremental exercise test on a bicycle ergometer using continuous VO(2) and VCO(2) measurement. Similar tests with conventional pedals and the novel pedals, which were mounted on the individual racing bike of the participant, were randomized. Maximal power was greater with novel pedals than with conventional pedals (between 6.0%, s(x) = 1.5 at 40 rev min(-1) and 1.8%, s(x) = 0.7 at 120 rev min(-1); P = 0.01). Torque production between crank angles of 60 degrees and 150 degrees was higher with novel pedals than with conventional pedals (P = 0.004). The novel pedal design did not affect whole-body VO(2) or VCO(2). Mechanical efficiency was greater with novel pedals than with conventional pedals (27.2%, s(x) = 0.9 and 25.1%, s(x) = 0.9% respectively; P = 0.047; effect size = 0.9). In conclusion, the novel pedals can increase maximal power output and mechanical efficiency in well-trained cyclists.
authors.affiliation: Department of Biomedical Kinesiology, Faculty of Kinesiology and Rehabilitation Sciences, KU Leuven, Leuven, Belgium.
authors.forename: Erwin
authors.initials: E
authors.lastname: Koninckx
authors.forename: Marc
authors.initials: M
authors.lastname: van Leemputte
authors.forename: Peter
authors.initials: P
authors.lastname: Hespel
mesh_terms: D001642:Bicycling / Q000502:physiology*; D001696:Biomechanical Phenomena; D004867:Equipment Design; D005080:Exercise Test; D006801:Humans; D008297:Male; D010101:Oxygen Consumption; D019876:Sports Equipment; D019415:Torque; D055815:Young Adult