title: Influence of recovery intensity on time spent at maximal oxygen uptake during an intermittent session in young, endurance-trained athletes.
abstract: In this study, we examined the effects of three recovery intensities on time spent at a high percentage of maximal oxygen uptake (t90[Vdot]O(2max)) during a short intermittent session. Eight endurance-trained male adolescents (16 +/- 1 years) performed four field tests until exhaustion: a graded test to determine maximal oxygen uptake ([Vdot]O(2max); 57.4 +/- 6.1 ml x min(-1) . kg(-1)) and maximal aerobic velocity (17.9 +/- 0.4 km x h(-1)), and three intermittent exercises consisting of repeat 30-s runs at 105% of maximal aerobic velocity alternating with 30 s active recovery at 50% (IE(50)), 67% (IE(67)), and 84% (IE(84)) of maximal aerobic velocity. In absolute values, mean t90[Vdot]O(2max) was not significantly different between IE(50) and IE(67), but both values were significantly longer compared with IE(84). When expressed in relative values (as a percentage of time to exhaustion), mean t90[Vdot]O(2max) was significantly higher during IE(67) than during IE(50). Our results show that both 50% and 67% of maximal aerobic velocity of active recovery induced extensive solicitation of the cardiorespiratory system. Our results suggest that the choice of recovery intensity depends on the exercise objective.
authors.affiliation: Laboratoire d'Etudes de la Motricité Humaine (EA 3608), Faculté des Sciences du Sport et de l'Education Physique, Ronchin, France. thevenet.d@gmail.com
authors.forename: Delphine
authors.initials: D
authors.lastname: Thevenet
authors.forename: Erwan
authors.initials: E
authors.lastname: Leclair
authors.forename: Magaly
authors.initials: M
authors.lastname: Tardieu-Berger
authors.forename: Serge
authors.initials: S
authors.lastname: Berthoin
authors.forename: Sophie
authors.initials: S
authors.lastname: Regueme
authors.forename: Jacques
authors.initials: J
authors.lastname: Prioux
mesh_terms: D000293:Adolescent; D000367:Age Factors; D015444:Exercise / Q000502:physiology; D005080:Exercise Test; D017079:Exercise Tolerance / Q000502:physiology*; D006801:Humans; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology*; D012420:Running / Q000502:physiology*; D013177:Sports; D013997:Time Factors