Laboratoire ACTES

Guadeloupe

Laboratoire ACTES

Guadeloupe
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Galy O.,University of New Caledonia | Galy O.,Laboratoire ACTES | Zongo P.,University of New Caledonia | Zongo P.,Laboratoire ACTES | And 5 more authors.
Biology of Sport | Year: 2015

This study assessed the anthropometric and physiological characteristics of elite Melanesian futsal players in order to determine the best performance predictors. Physiological parameters of performance were measured in 14 Melanesian (MEL-G, 24.4±4.4 yrs) and 8 Caucasian (NMEL-G, 22.9±4.9) elite futsal players, using tests of jump-and-reach (CMJ), agility (T-Test), repeated sprint ability (RSA), RSA with change-of-direction (RSA-COD), sprints with 5 m, 10 m, 15 m, and 30 m lap times, and aerobic fitness with the 30-15 intermittent fitness test (30-15 IFT). The anthropometric data revealed significantly lower height for MEL-G compared with NMEL-G: 1.73±0.05 and 1.80±0.08 m, respectively; P=0.05. The CMJ was significantly higher for MEL-G than NMEL-G: 50.4±5.9 and 45.2±4.3 cm, respectively; P=0.05. T-Test times were significantly lower for MEL-G than NMEL-G: 10.47±0.58 and 11.01±0.64 seconds, respectively; P=0.05. MEL-G height was significantly related to CMJ (r=0.706, P=0.01), CMJpeakP (r=0.709, P=0.01) and T-Test (r=0.589, P=0.02). No significant between-group differences were observed for sprint tests or 30-15 IFT, including heart rate and estimated VO2max. Between groups, the percentage decrement (%Dec) in RSA-COD was significantly lower in MEL-G than NMEL-G (P=0.05), although no significant difference was noted between RSA and RSA-COD. Within groups, no significant difference was observed between %Dec in RSA or RSA-COD; P=0.697. This study presents specific anthropometric (significantly lower height) and physiological (significantly greater agility) reference values in Melanesians, which, taken together, might help coaches and physical fitness trainers to optimize elite futsal training and talent identification in Oceania. © 2015, Institute of Sport. All rights reserved.


Sangkatumvong S.,University of Southern California | Connes P.,Laboratoire ACTES | Connes P.,French Institute of Health and Medical Research | Pais E.,Childrens Hospital Los Angeles | And 5 more authors.
Clinical Hemorheology and Microcirculation | Year: 2010

Sickle cell disease (SCD), a genetically-determined pathology due to an amino acid substitution (i.e., valine for glutamic acid) on the beta-chain of hemoglobin, is characterized by abnormal blood rheology and periods of painful vascular occlusive crises. Sickle cell trait (SCT) is a typically benign variant in which only one beta chain is affected by the mutation. Although both SCD and SCT have been the subject of numerous studies, information related to neurological function and transfusion therapy is still incomplete: an overview of these areas is presented. An initial section provides pertinent background information on the pathology and clinical significance of these diseases. The roles of three factors in the clinical manifestations of the diseases are then discussed: hypoxia, autonomic nervous system regulation and blood rheology. The possibility of a causal relationship between these three factors and sudden death is also examined. It is concluded that further studies in these specific areas are warranted. It is anticipated that the outcome of such research is likely to provide valuable insights into the pathophysiology of SCD and SCT and will lead to improved clinical management and enhanced quality of life. © 2010 - IOS Press and the authors. All rights reserved.


PubMed | Laboratoire ACTES, University of the French West Indies and Guiana, University of New Caledonia, Football Training and Biomechanics Laboratory and 2 more.
Type: Journal Article | Journal: Biology of sport | Year: 2015

This study assessed the anthropometric and physiological characteristics of elite Melanesian futsal players in order to determine the best performance predictors. Physiological parameters of performance were measured in 14 Melanesian (MEL-G, 24.44.4 yrs) and 8 Caucasian (NMEL-G, 22.94.9) elite futsal players, using tests of jump-and-reach (CMJ), agility (T-Test), repeated sprint ability (RSA), RSA with change-of-direction (RSA-COD), sprints with 5 m, 10 m, 15 m, and 30 m lap times, and aerobic fitness with the 30-15 intermittent fitness test (30-15 IFT). The anthropometric data revealed significantly lower height for MEL-G compared with NMEL-G: 1.730.05 and 1.800.08 m, respectively; P = 0.05. The CMJ was significantly higher for MEL-G than NMEL-G: 50.45.9 and 45.24.3 cm, respectively; P = 0.05. T-Test times were significantly lower for MEL-G than NMEL-G: 10.470.58 and 11.010.64 seconds, respectively; P = 0.05. MEL-G height was significantly related to CMJ (r = 0.706, P = 0.01), CMJpeakP (r = 0.709, P = 0.01) and T-Test (r = 0.589, P = 0.02). No significant between-group differences were observed for sprint tests or 30-15 IFT, including heart rate and estimated VO2max. Between groups, the percentage decrement (%Dec) in RSA-COD was significantly lower in MEL-G than NMEL-G (P = 0.05), although no significant difference was noted between RSA and RSA-COD. Within groups, no significant difference was observed between %Dec in RSA or RSA-COD; P = 0.697. This study presents specific anthropometric (significantly lower height) and physiological (significantly greater agility) reference values in Melanesians, which, taken together, might help coaches and physical fitness trainers to optimize elite futsal training and talent identification in Oceania.


Lamarre Y.,French Institute of Health and Medical Research | Lamarre Y.,University of the French West Indies and Guiana | Lamarre Y.,University of Paris Pantheon Sorbonne | Romana M.,French Institute of Health and Medical Research | And 19 more authors.
Clinical Hemorheology and Microcirculation | Year: 2014

While chronic hemolysis has been suspected to be involved in the development of glomerulopathy in patients with sickle cell anemia (SCA), no study focused on the implications of blood rheology. Ninety-six adults with SCA at steady state were included in the present cross-sectional study. Three categories were defined: normo-albuminuria (NORMO, n = 41), micro-albuminuria (MICRO, n = 23) and macro-albuminuria (MACRO, n = 32). Blood was sampled to measure hematological and hemorheological parameters, and genomic DNA extraction was performed to detect the presence of α-thalassemia. The prevalence of α-thalassemia was lower in the MACRO group compared with the two other groups. Anemia was more severe in the MACRO compared with the NORMO group leading the former group to exhibit decreased blood viscosity. Red blood cell deformability was lower and red blood cell aggregates strength was greater in the MACRO compared to the two other groups, and this was directly attributed to the lower frequency of α-thalassemia in the former group. Our results show the protective role of α-thalassemia against the development of sickle cell glomerulopathy, and strongly suggest that this protection is mediated through the decrease of anemia, the increase of RBC deformability and the lowering of the RBC aggregates strength. © 2014 ? IOS Press and the authors.


PubMed | Laboratoire ACTES
Type: Journal Article | Journal: International journal of sports medicine | Year: 2015

The authors explored the effects of open water swimming in a tropical environment on both core temperature (T c) and thermal perceptions of high-level swimmers during an official international 10-km race and two 5-km swimming tests. The swimmers drank neutral water (i.e., 28.03.0C) ad libitum every 2,000m during Competition, whereas the ingested volume was imposed in the 5-km tests: every 1,000m, they drank 190mL of cold water (CW, 1.10.7C) or neutral water (NW, 28.03.0C). They also self-rated their thermal comfort and sensation (TC and TS), and their T c was recorded. The study demonstrated that adequate fluid intake significantly decreased T c in swimmers swimming at race pace in hot water (i.e., 37.50.3C vs. 38.30.4C, in NW vs. Competition, respectively). This effect was more pronounced with cold water (i.e., 36.71.1C, in CW). No significant changes were noted in mean heart rate (i.e., 1455, 1434 and 1415bpm for NW, CW and Competition, respectively). Further studies are needed to explore the effect of this cooling method on the performances of international swimmers during tropical swimming events.

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