Revista de Medicina Desportiva (English) November 2018 - Page 31

Rev. Medicina Desportiva informa, 2018, 9(6):29-30. Mortality Benefits for Replacing Sitting Time with Different Physical Activities Matthews, C. E. et al. Med Sci Spots Exerc, 47(9), set 2015. Dr. Basil Ribeiro Introduction There are several studies that associate physical activity and the decrease of the incidence of diseases, cardiovascular and others, and also with the decreased mortality associated with non- transmissible diseases. So, it is not a surprise the appeal to practice physical exercise and sports in order to get such benefits. The common citizen is stimulated to do physical exercise, moderate or high intensity, three, five or as much as possible days per week during a period of time that can vary between 20-30 to 60 minutes. The problem become solved and the other 23 hours of the day could be spent resting, seated, watching television or on the tablet. However, this paradigm has to change. It is stated by the authors of this text that “recent studies challenge de idea that only a few hours per week of aerobic exercise is enough to totally mitigate the risks of mortality”, because “there are high risks for health associated with the excessive time spent in the seated position, which replaces the activities of daily life”. There has been during the last years the con- cept of spontaneous physical activ- ity, referring to everything that is done daily, like to walk to shopping, to take the stairs or to vacuum the house. It is highlighted the move- ment throughout the day and the minimization of the complete rest. This study assumes that being seated for long time is a risk factor for early mortality but it is unknown the advantage to replace the inactiv- ity for physical exercise or for daily activities. Of these, it is stretched simple tasks, like cooking, shopping, clean, but also other home tasks with moderate or high intensity, like vacuum, sweep, gardening or cut the hedge. The authors refer in the intro- duction of this study the hypoth- esis of the replacement, where the time being seated is replaced by the time for physical activity, which is associated to a decrease of the risk of disease. Association between physical activity, sedentarism and cancer Methods In this study, approved by the department for especial studies of the National Cancer Institute (USA), included 154614 eligible partici- pants of the initial 318714, without significant diseases, 59 to 82 years old, that responded to two question- naires. The questionnaire of physical activity included questions to find out the total time involved in 16 activities for the last 12 months. The activities were divided in exercise and sports (8 questions) and activi- ties not related with exercise and, in these, there were 5 questions related to domestic activities, two about gar- dening and mowing, and one related to daily march. The duration of the daily activity was the sum of all the previous. There were three questions about being seated, and it was asked for how long that happened for the last 12 months. Results During the period of follow-up of 6.8±1.0 years there were 7218 and 4983 of deaths, in men and women respectively. Women referred more global activity and of non-organized exercise (2,70 vs 2,35 hours/day) than men, but less time spent on intentional exercise. On that physi- cal activity, in men and in women, the most frequent were domestic activities /43%), followed by garden- ing and mowing (15%) and daily march (14%). The persons less active (n=69606) reported 1,15±0,50 h/day of global physical activity, while the more active (n=85008) reported 3,64±1,50 h/day. The time spent seated was similar in men and in women: 7,3±3,4 h/day vs. 7,5±3,5 h/d, where 41% was to watch television, videos or DVDs in men and in women and about 25% while travelling by bus, car or train. The time spent seated was associ- ated to a progressive increase on all- cause mortality, cardiovascular or others, but not to cancer. The Results indicate that the greater amount of Relationship between total sitting time and global mortality in men 2 Revista de Medicina Desportiva informa november 2018 · 29