PubMed Health⌕ Search

Biomedical subjects

P Moretto

Publications and source records attributed to P Moretto.

24 records · Page 2Linked to original sources

Adaptation of maximal aerobic and anaerobic tests for disabled swimmers.

The purpose of the present study was to submit disabled swimmers to two maximal swimming tests, and by comparing the physiological and performance responses of disabled and normal swimmers to determine if these adapted tests can be used to design training programmes for this particular class of swimmer. Two groups of disabled (n = 8 and 6) and two groups of normal competitive swimmers (n = 9 and 13) were respectively submitted to a functional maximal aerobic power test (FMAPT) and a maximal anaerobic lactic test (MANLT). For the disabled, the FMAPT included a slower initial speed and a slower increase in swimming speeds. In the maximal aerobic test, exercise duration, peak heart rate, and the maximal speed relative to the respective best time of a 100-m race [55.5 (SD 3.9) compared to 56.5 (SD 2.8)%] were not significantly different between the disabled and normal swimmers. Peak lactate concentration was, however, higher in the disabled swimmers [10.8 (SD 3.5) compared to 6.8 (SD 1.6)mmol.l-1]. In the MNALT, peak lactate concentration [14.3 (SD 4) compared to 16.8 (SD 1.9)mmol.l-1], and the maximal speed relative to the respective best time in a 100-m race [99.1 (SD 3.2) compared to 98.3 (SD 2.5)%] were not significantly different between the disabled and normal swimmers. These results would seem to indicate that functional maximal aerobic and anaerobic field tests could be used to evaluate and design training programmes for disabled competitive swimmers.

Adaptation, Physiological↗

Nuclear microanalysis of the monovalent ion distribution in the human amnion. I. Effect of magnesium.

The effect of the addition of MgCl2 on the Na+, K+, and Cl- concentration and distribution in epithelial and compact layers of the human amniotic membrane was investigated using the Bordeaux nuclear microprobe. Particle-induced X-ray emission and Rutherford backscattering spectrometry techniques were used to provide quantitative measurements. In physiological medium (Hanks' solution), the monovalent ion concentrations were identical in both layers. The addition of Mg2+ ions in Hanks' solution induced a decrease of, K+, and Cl- concentration in both layers and, Na+ concentration in the compact layer. The results obtained from nuclear microanalysis might be explained from electrophysiological data which indicate that the addition of Mg2+ ions results in an increase in the cellular, paracellular and exchanger ion pathways.

Amnion↗

Antioxidant status (selenium, vitamins A and E) and aging.

Antioxidant status can be evaluated by blood selenium, vitamins A and E. The level of selenium was determined in whole blood, erythrocytes and plasma of 170 French people (70-95 years old) healthy and with intercurrent illness, by using PIXE (proton-induced X-ray emission analysis). These results are discussed with other values from the literature. Plasma levels of vitamins A and E have been measured by HPLC. All data were compared with those obtained for younger subjects. Healthy elderly people residing in a geriatric home received selenium supplements during 1 month. The influence of this supplementation brought to light a deficiency for this trace element. The correlation of aging and nutritional requirements with immune function, heart and cancer death rate is presented and discussed.

Adult↗

A low plasma selenium is a risk factor for peripartum cardiomyopathy. A comparative study in Sahelian Africa.

A specific selenium deficiency is a risk factor for Keshan disease, an endemic cardiomyopathy observed in China. In a Sahelian area of Niger, plasma selenium concentration was measured by neutronic activation and particle induced X-ray emission in 35 black African women with peripartum cardiomyopathy and 36 breast-feeding women without cardiac failure as controls. The plasma selenium concentration in patients was lower (48 +/- 25 ng/ml, mean +/- standard deviation) than in controls (77 +/- 16 ng/ml) (P less than 0.0001). Moreover, 40% (14/35) patients with peripartum cardiomyopathy had very low plasma selenium concentrations, below 45 ng/ml, versus none in controls. A low plasma selenium concentration is a risk factor for the Sahelian peripartum cardiomyopathy.

Cardiomyopathies↗