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Filter by:During an incremental cardiopulmonary exercise test (CPET) performed with a ramp protocol, it is very important to determine the anaerobic threshold, defined as the point at which the metabolism switches from being predominantly aerobic to also being anaerobic. The anaerobic threshold can be determined invasively, by identifying the increase in blood lactates with an arterial sampling, or, more commonly, non-invasively by three methods: the V-slope method, the ventilatory equivalents method and by using end-expiratory oxygen and carbon dioxide pressure (PETO2 and PETCO2 respectively). Normally, the anaerobic threshold is determined by the first method and the other two are used to confirm the value. The finding of different anaerobic threshold values using these three methods has been reported anecdotally in the past, while a prevalence of 11% in a healthy population has recently been described. Regular training, particularly that aimed at endurance sports, is able to shift the anaerobic threshold to higher exercise intensities. At present, the physiological reasons for the presence of a double threshold are unclear. The aim of the study is to identify the anaerobic threshold by means of the V-slope method and by means of the ventilatory equivalents method in athletes who have performed an incremental ramp CPET at the laboratories of the investigating centres, to assess in how many athletes a double threshold is present and to try to interpret the physiological/ pathophysiological significance of this finding. In this retrospective and prospective observational study, healthy male and female athletes who have had a cardiopulmonary test at our laboratories from 2007 to the present (retrospectively recruited) and prospectively recruited until the calculated sample size is reached will be enrolled.
The gastrointestinal tract contains hundreds of millions of microorganisms, collectively called the intestinal flora, which plays an important role in the health of the host. Many studies have also confirmed that the composition and function of the intestinal flora can be changed through the training chain. Changes in the composition of intestinal microbes can affect exercise performance, energy metabolism, oxidative stress, immune function, inflammation, and tissue repair. Therefore, maintaining a healthy gut microbial balance is essential for athletes' health, training, nutritional status, and athletic performance. This project intends to use metagenomics, proteomics, and metabolomics and other technologies to systematically explore the effects of different training periods and dietary interventions on the intestinal flora of muscle strength and endurance athletes. , Protein expression and the influence of metabolites. In the plan, explore the differences in the intestinal flora between muscle strength and endurance sports athletes during the preparation period, competition period, and transition period, and collect blood and feces to perform protein and metabolite molecular changes. It is hoped that through the smooth implementation of this research project, the research results can be applied to personalized diet planning, improve intestinal adaptability and the effectiveness of sports nutrition intervention, and then adjust athletes' status and improve sports performance to win the highest honor for the country in the arena.