共查询到20条相似文献，搜索用时 31 毫秒
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Subject
The use of Fourier transform infrared spectrometry technique (FT-IR) as a pitch technique of the biological control of short and intense exercises close to those of Rugby matches.Material and method
In reference to 28 rugbymen of international level, the biological results of three short and intense exercises and two periods of recovery were analyzed by TF-IR. The exercises are: (1) sprints; (2) 12 × 20 m of swerve running; (3) 6 × 30 s of shuttle run.Results
Lactate, glucose, urea, and to a lesser degree, triglycerides showed a significant evolution. If the evolution of the two first was in conformity with the literature, the increase of urea probably results from the activation of the purins–nucleotides cycle, whereas the evolution of triglycerides is explained by their probable muscular use during periods of active recovery. Among proteins related to the healthy sportsman, only haptoglobin presents a significant variation difficult to explain whereas CRP, orosomucoid and immunoglobulins A, G and M remain close to their rest values.Conclusion
With the use of FT-IR technique, it is possible to intervene directly on the pitches of the sporting practice to control the biological incidences and to adjust the loads individually. It is also possible to detect inflammatory and immunological problems related to the biomechanical and physiological stresses. 相似文献9.
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The aim of the present work was to study the evolution with age of the maximal oxygen uptake (VO2max) and gross efficiency on rowing ergometer in a population of 29 elite oarsmen (17 adults and 12 youths). Independently of body mass, VO2max increases until 23 years of age and very slightly afterwards. This evolution might be explained by the increase of the volume and intensity of training once the subjects become adults. Efficiency increases continuously with age and leave opportunities to improve this parameter even in high level oarsmen. 相似文献
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Context
Exercise hypoglycaemia (EH) is a very common yet little studied condition. It occurs in subjects with high values of insulin sensitivity (SI) and glucose effectiveness (SG), and is mainly triggered by dietary errors, over-training, or special circumstances (exposure to unusual temperatures, altitude, disruption of circadian rhythms).Methods and results
We showed that SI and SG can be calculated from test meals by mathematical modelling (oral minimal model), whereas in athletes “surrogates” of SI (HOMA, QUICKI, etc.) are misleading (not applicable in this area of high insulin sensitivity). These meals can also provide a comprehensive picture of the components of insulin secretion, which makes this exploration more informative. We studied the results obtained by this method in 19 athletes complaining of EH compared to 58 matched athletes not complaining from this problem. We observed higher values of SI (P < 0.05) and SG (P < 0.03), but overall, insulin secretion Φoral was similar. However, one of the components of insulin secretion, β-cell glucose sensitivity, is higher on the average (P < 0.04) because in 30% of cases it remains above the normal range for athletes, while remaining in the range for a normal population. Therefore, overall tolerance to carbohydrates (product Φoral × SI) is higher (+58% P < 0.04).Conclusion
Thus, these subjects have a powerful carbohydrate disposal, which is incompletely compensated by the expected homeostatic decrease in insulin secretion, especially with regard to β-cell glucose sensitivity. 相似文献20.