title: Self-paced ergometer performance: effects of pedal resistance, motivational contingency and inspired oxygen concentration.
mesh_terms: D001290:Attitude; D006801:Humans; D000860:Hypoxia; D007866:Leg / Q000502:physiology; D008297:Male; D009042:Motivation; D009119:Muscle Contraction; D005082:Physical Exertion; D010809:Physical Fitness; D012119:Respiration; D012146:Rest; D013647:Task Performance and Analysis; D014937:Work