Background： Smokeless tobacco is widely used by athletes to enhance performance. Nicotine is a central nervous system stimulant and acts on cardiocirculatory and metabolic systems, involving tissue blood flow and cir...Background： Smokeless tobacco is widely used by athletes to enhance performance. Nicotine is a central nervous system stimulant and acts on cardiocirculatory and metabolic systems, involving tissue blood flow and circulatory vasoreactivity. The aim of this study was to investigate the effects of the oral smokeless tobacco （Swedish snus （SS）） on the perception of fatigue and time to exhaustion （TTE） during moderate-intensity aerobic exercise. Methods： Fourteen healthy non-tobacco male users were recruited for a double-blind, controlled crossover design （SS vs. snus placebo （SP））. Subjects were tested for 3 sessions： experimental session 1 （Exp 1） consisted of an incremental test to determine the maximal aerobic power out-put （Wmax）, whereas Exp2 and Exp3 consisted of exercising at 65%Wmax until exhaustion in SS or SP conditions. During Exp2 and Exp3, muscle and cerebral oxygenation was assessed by means of near-infrared spectroscopy, and the rating of perceived exertion （RPE） was recorded. Results： Comparing SS with SP tests, significant differences （p 〈 0.05） were found in the values of cerebral （-3%） and muscular tissues oxygenation （-4%） in the first 30 min of exercise. The RPE values were not significantly different between the 2 conditions （SS vs. SP）. No significant difference was found in TTE （SS： 54.25 ± 21.84 min; SP： 50.01 ± 17.03 min）. Conclusion： This study showed that muscular and cerebral oxygenation increased significantly with snus administration during an endurance exercise until exhaustion, but this did not affect fatigue perception and TTE. The results showed that snus could not be considered an ergogenic substance in non-tobacco users.2018 Published by Elsevier B.V. on behalf of Shanghai University of Sport. This is an open access article under the CC BY-NC-ND license. （http：//creativecommons.org/licenses/by-nc-nd/4.0/）.展开更多
The experience and lessons from the century and the experience of successful development of market economy since the 19th socialism with Chinese characteristics show that the free development of the market needs corre...The experience and lessons from the century and the experience of successful development of market economy since the 19th socialism with Chinese characteristics show that the free development of the market needs corresponding governance to match up with it, or the other way round it will inevitably enlarge the negative influence of the market and lead to the intensification of social contradictions. In order to promote the healthy development of economic globalization, it is necessary to adjust the previous neoliberal order and establish a new global governance model, for the old order is oriented towards complete marketization, privatization and Westernized political system in terms of governance. This model is the crux of many problems in the current economic globalization. For this reason, the new global governance should be based on the following consensus： The balance between the market and the state recognizes a diversified national governance mode, but such pluralistic mode should be premised on win-win cooperation and mutual benefits, and boosting development provides a basis for guaranteeing the smooth development of current economic globalization. At present, it is urgent to find a global approach to the improvement of development to cope with the tmdercurrents of de- and anti-globalization. So, the author holds that on the basis of the ＂Belt and Road Initiative,＂ the construction of global infrastructure should be used as a new growth point for promoting global economy. This solution can alleviate the difficulties of employment loss and weak growth in some developed countries in the West, improve the development capacity of developing countries, and meanwhile enhance the production capacity and capital exports of countries like China.展开更多
基金supported by research funds allocated to the following departments at the University of Verona:Neurosciences,Biomedicine and Movement Sciences,and Diagnostic and Public Health
文摘Background： Smokeless tobacco is widely used by athletes to enhance performance. Nicotine is a central nervous system stimulant and acts on cardiocirculatory and metabolic systems, involving tissue blood flow and circulatory vasoreactivity. The aim of this study was to investigate the effects of the oral smokeless tobacco （Swedish snus （SS）） on the perception of fatigue and time to exhaustion （TTE） during moderate-intensity aerobic exercise. Methods： Fourteen healthy non-tobacco male users were recruited for a double-blind, controlled crossover design （SS vs. snus placebo （SP））. Subjects were tested for 3 sessions： experimental session 1 （Exp 1） consisted of an incremental test to determine the maximal aerobic power out-put （Wmax）, whereas Exp2 and Exp3 consisted of exercising at 65%Wmax until exhaustion in SS or SP conditions. During Exp2 and Exp3, muscle and cerebral oxygenation was assessed by means of near-infrared spectroscopy, and the rating of perceived exertion （RPE） was recorded. Results： Comparing SS with SP tests, significant differences （p 〈 0.05） were found in the values of cerebral （-3%） and muscular tissues oxygenation （-4%） in the first 30 min of exercise. The RPE values were not significantly different between the 2 conditions （SS vs. SP）. No significant difference was found in TTE （SS： 54.25 ± 21.84 min; SP： 50.01 ± 17.03 min）. Conclusion： This study showed that muscular and cerebral oxygenation increased significantly with snus administration during an endurance exercise until exhaustion, but this did not affect fatigue perception and TTE. The results showed that snus could not be considered an ergogenic substance in non-tobacco users.2018 Published by Elsevier B.V. on behalf of Shanghai University of Sport. This is an open access article under the CC BY-NC-ND license. （http：//creativecommons.org/licenses/by-nc-nd/4.0/）.
文摘The experience and lessons from the century and the experience of successful development of market economy since the 19th socialism with Chinese characteristics show that the free development of the market needs corresponding governance to match up with it, or the other way round it will inevitably enlarge the negative influence of the market and lead to the intensification of social contradictions. In order to promote the healthy development of economic globalization, it is necessary to adjust the previous neoliberal order and establish a new global governance model, for the old order is oriented towards complete marketization, privatization and Westernized political system in terms of governance. This model is the crux of many problems in the current economic globalization. For this reason, the new global governance should be based on the following consensus： The balance between the market and the state recognizes a diversified national governance mode, but such pluralistic mode should be premised on win-win cooperation and mutual benefits, and boosting development provides a basis for guaranteeing the smooth development of current economic globalization. At present, it is urgent to find a global approach to the improvement of development to cope with the tmdercurrents of de- and anti-globalization. So, the author holds that on the basis of the ＂Belt and Road Initiative,＂ the construction of global infrastructure should be used as a new growth point for promoting global economy. This solution can alleviate the difficulties of employment loss and weak growth in some developed countries in the West, improve the development capacity of developing countries, and meanwhile enhance the production capacity and capital exports of countries like China.
