Abstract
Statement of ProblemUphill sections in cycling are relevant and impose significant demands on the respiratory system. Efficient and well-trained respiratory muscles have been shown to enhance cycling performance. However, there is limited information regarding the specific role of the diaphragm in supporting cycling performance during uphill climbs.
Sources of DataDiaphragm thickness was assessed using ultrasound imaging. The peak of maximal oxygen update (VO2Peak) was determined through a graded exercise test on a cycle ergometer. Time-to-completion was measured during a simulated uphill cycle climb on the cycle ergometer.
Conclusions ReachedA significant predictive effect on time-to-completion was observed with VO2Peak and End-inspiratory diaphragm thickness (R2 = .985, F (2,2) = 31.796, p <.03). Both VO2Peak and End-inspiratory diaphragm thickness significantly influenced time-to-completion in a simulated uphill cycle climb time trial among well-trained cyclists.