title: The VO2 response to submaximal ramp cycle exercise: Influence of ramp slope and training status.
abstract: The aim of the study was to test whether ramp slope and training status interact in the oxygen uptake (VO2) response during submaximal ramp exercise. Eight cyclists (VO2 peak=67.8+/-3.7 ml min(-1)kg(-1)) and eight physically active students (PA students) (VO2 peak=49.1+/-4.3 ml min(-1)kg(-1)) performed several ramp protocols, respectively, 25 and 40 W min(-1) for the cyclists and 10, 25 and 40 W min(-1) for the PA students. Vo(2) was plotted as a function of time and work rate up to the gas exchange threshold (GET). Faster ramp elicited a significantly shorter mean response time (MRT) in both groups, and MRT was significantly longer for each ramp protocol in the PA students (126+/-32s, 76+/-15s and 50+/-6s for ramp 10, ramp 25 and ramp 40, respectively) compared to the cyclists (61+/-9s and 40+/-11s for ramp 25 and ramp 40, respectively). Ramp 40 showed less steep Delta VO2/Delta W than ramp 25 in both groups (p<0.01) and Delta VO2/Delta W was less steep for each ramp protocol in PA students (p<0.01) (9.82+/-0.30 ml min(-1)W(-1) and 9.33+/-0.45 ml min(-1)W(-1) for ramp 25 and ramp 40, respectively) compared to cyclists (10.31+/-0.40 ml min(-1)W(-1) and 10.05+/-0.48 ml min(-1)W(-1) for ramp 25 and ramp 40, respectively). In the PA students, Delta VO2/Delta W did not differ between ramp 10 and ramp 25. Statistical analysis showed no interaction effects between ramp slope and training status for MRT (p=0.62) and Delta VO2/Delta W (p=0.35).
authors.affiliation: Department of Movement and Sports Sciences, Ghent University, Watersportlaan 2, B-9000 Gent, Belgium. jan.boone@ugent.be
authors.forename: Jan
authors.initials: J
authors.lastname: Boone
authors.forename: Katrien
authors.initials: K
authors.lastname: Koppo
authors.forename: Jacques
authors.initials: J
authors.lastname: Bouckaert
mesh_terms: D000328:Adult; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology*; D013177:Sports / Q000502:physiology*; D013997:Time Factors