N. Blondel
university of lille
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Publication
Featured researches published by N. Blondel.
European Journal of Applied Physiology | 1999
V. Billat; N. Blondel; Serge Berthoin
Abstract The so-called velocity associated with V˙O2max, defined as the minimal velocity which elicits V˙O2max in an incremental exercise protocol (vV˙O2max), is currently used for training to improve V˙O2max. However, it is well known that it is not the sole velocity which elicits V˙O2max and it is possible to achieve V˙O2max at velocities lower and higher than vV˙O2max. The goal of this study was to determine the velocity which allows exercise to be maintained the longest time at V˙O2max. Using the relationship between time to exhaustion at V˙O2max in the all-out runs at 90%, 100%, 120% and 140% of vV˙O2max and distance run at V˙O2max, the velocity which elicits the longest time to exhaustion at V˙O2max (CV′) was determined. For the six subjects tested (physical education students), this velocity was not significantly different from vV˙O2max (16.96 ± 0.92 km · h−1 vs 17.22 ± 1.12 km · h−1, P = 0.2 for CV′ and vV˙O2max, respectively) and these two velocities were correlated (r = 0.88, P = 0.05).
European Journal of Applied Physiology | 2000
V. Billat; R. H. Morton; N. Blondel; Serge Berthoin; V. Bocquet; J. P. Koralsztein; Thomas J. Barstow
Abstract The purpose of this study was to characterise the relationship between running velocity and the time for which a subject can run at maximal oxygen uptake (V˙O2max), (tlimV˙O2max). Seven physical education students ran in an incremental test (3-min stages) to determine V˙O2max and the minimal velocity at which it was elicited (νV˙O2max). They then performed four all-out running tests on a 200-m indoor track every 2 days in random order. The mean times to exhaustion tlim at 90%, 100%, 120% and 140% νV˙O2max were 13 min 22 s (SD 4 min 30 s), 5 min 47 s (SD 1 min 50 s), 2 min 11 s (SD 38 s) and 1 min 12 s (SD 18 s), respectively. Five subjects did not reach V˙O2max in the 90% νV˙O2max test. All the subjects reached V˙O2max in the runs at 100% νV˙O2max. All the subjects, except one, reached V˙O2max in the runs at 120%νV˙O2max. Four subjects did not reach V˙O2max in the 140% νV˙O2max test. Time to achieve V˙O2max was always about 50% of the time to exhaustion irrespective of the intensity. The time to exhaustion-velocity relationship was better fitted by a 3- than by a 2-parameter critical power model for running at 90%, 100%, 120%, 140% νV˙O2max as determined in the previous incremental test. In conclusion, tlimV˙O2max depended on a balance between the time to attain V˙O2max and the time to exhaustion tlim. The time to reach V˙O2max decreased as velocity increased. The tlimV˙O2max was a bi-phasic function of velocity, with a peak at 100% νV˙O2max.
Journal of Science and Medicine in Sport | 2010
Gregory Dupont; Mathieu Defontaine; Laurent Bosquet; N. Blondel; Wassim Moalla; Serge Berthoin
The first purpose of this study was to determine whether the peak velocity (V(Yo-Yo)) achieved during the Yo-Yo intermittent recovery test (Yo-Yo) and the maximal aerobic velocity (MAV) determined from the Université de Montréal Track Test (UMTT) could be used interchangeably. The second purpose was to check that the V(Yo-Yo) is related to the intermittent exercise performance, which consisted of repeated 90 m distance runs in 15s performed until exhaustion, alternated with 15s of passive recovery (15/15). Fourteen amateur soccer players performed, in a random order, the 15/15 and two incremental field-tests: the Yo-Yo and the UMTT. The results of this study showed that MAV was significantly correlated to the V(Yo-Yo) (r=0.79, p<0.01). However, the error was not constant, when the V(Yo-Yo) and the MAV values were higher than 16.3 km h(-1), the MAV values tends to be higher than the V(Yo-Yo), while when the V(Yo-Yo) and the MAV values were lower than 16.3 km h(-1), the MAV values tends to be lower than the V(Yo-Yo). MAV and V(Yo-Yo) were significantly correlated to the time to exhaustion of the 15/15 (r=0.74 and r=0.72, respectively) and show that both tests are similarly related to the high-intensity intermittent exercise performance.
European Journal of Applied Physiology | 2003
Gregory Dupont; N. Blondel; Serge Berthoin
Canadian Journal of Applied Physiology-revue Canadienne De Physiologie Appliquee | 2002
Gregory Dupont; N. Blondel; Ghislaine Lensel; Serge Berthoin
Medicine and Science in Sports and Exercise | 2007
Renaud Legrand; Alexandre Marles; Fabrice Prieur; Stefano Lazzari; N. Blondel; Patrick Mucci
International Journal of Sports Medicine | 2001
N. Blondel; Serge Berthoin; V. Billat; G. Lensel
International Journal of Sports Medicine | 2003
Gregory Dupont; N. Blondel; Serge Berthoin
Canadian Journal of Applied Physiology-revue Canadienne De Physiologie Appliquee | 2003
Serge Berthoin; Georges Baquet; Gregory Dupont; N. Blondel; Patrick Mucci
European Journal of Applied Physiology | 2007
Alexandre Marles; Renaud Legrand; N. Blondel; Patrick Mucci; D. Betbeder; Fabrice Prieur