Nationales et internationales...

16/04/2009

Publication scientifique du mois d'Avril 2009...

posté à 13h34

Ce mois-ci, une nouvelle publication (sous presse) conduite par un étudiant australien en PhD, Pete Peeling, vous est proposée au regard de son intérêt majeur dans la problématique en course à pied des effets combinés de l'intensité de l'entraînement et de la surface de course sur les processus inflammatoire, hématologique :

Med Sci Sports Exerc. 2009

Training Surface and Intensity: Inflammation, Hemolysis, and Hepcidin Expression.

Peeling P, Dawson B, Goodman C, Landers G, Wiegerinck ET, Swinkels DW, Trinder D.

PURPOSE:: This investigation assessed the effects of training intensity and ground surface type on hemolysis, inflammation, and hepcidin activity during running.

METHODS:: Ten highly trained male endurance athletes completed a graded exercise test, two continuous 10-km runs on a grass (GRASS) and a bitumen road surface (ROAD) at 75%-80% peak V(dot)O2 running velocity, and a 10 x 1 km interval running session (INT) at 90%-95% of the peak V(dot)O2 running velocity. Venous blood and urine samples were collected before, immediately after, and at 3 and 24 h after exercise. Serum samples were analyzed for circulating levels of IL-6, free hemoglobin (Hb), haptoglobin (Hp), iron, and ferritin. Urine samples were analyzed for changes in hepcidin expression.

RESULTS:: After running, the IL-6 and free Hb were significantly greater, and serum Hp was significantly lower than preexercise values in all three conditions (P < 0.05). Furthermore, IL-6
levels and the change in free Hb from baseline were significantly greater in the INT compared with those in the GRASS (P < 0.05). There were no differences between the GRASS and ROAD training surfaces (P > 0.05). Serum iron and ferritin were significantly increased after exercise in all three conditions (P < 0.05) but were not different between trials.

CONCLUSION:: Greater running intensities incur more inflammation and hemolysis, but these variables were not affected by the surface type trained upon.

 


Autre news:
16/10/2018 : KONA 2018 : le bilan… et la suite…
09/10/2018 : KONA 2018 : J-5
02/10/2018 : SEPTEMBRE 2018 : Tom LECOMTE au RDV…
04/09/2018 : AOÛT 2018 : 2 Podiums à Embrun…
02/08/2018 : JUILLET 2018 : Anthony PHILIPPE : 2, 14, 44 et 70…
04/07/2018 : JUIN 2018 : du très bon, du bon, du cohérent et de la frustration…
30/05/2018 : Mai 2018 : des victoires et un nouveau SLOT pour Hawaii…
01/05/2018 : AVRIL 2018 : Un titre de Champion de France de Duathlon format L & un SLOT pour Hawaii…
03/04/2018 : MARS 2018...
06/03/2018 : FEVRIER 2018…


» Consulter les archives

RSS



     

PhysioPerf

Altitude Training Solutions

Onlinetri

RG Films