xercise, Vitamins and Respiratory ract Infections
نویسنده
چکیده
Chubak and colleagues reported that moderate-intensity xercise training reduced common cold incidence but had o effect on the total incidence of upper respiratory infecions. As a motivation for the trial, they cited 2 randomized to 4-month trials; however, these trials did not find a tatistically significant effect on upper respiratory infection ncidence from moderate exercise, but the studies were mall (N 36). In their article, Chubak et al failed to refer to our study nalyzing the relation between physical activity and comon cold incidence in middle-aged Finnish men of the TBC Study cohort (N 14,401). Physical activity at work nd at leisure had no association with common cold ncidence. In Chubak et al’s trial, less severe upper respiratory nfections were classified as “the common cold,” and the emaining episodes included “flu” and were, on average, ore severe. The causes of the illnesses in these 2 groups re largely overlapping, but the difference in severity is mportant. There was no significant difference in the sum of pisodes between the 2 treatment groups. However, accordng to Table 2 in Chubak et al’s article, the severity of upper espiratory infections was considerably dissimilar in the 2 ntervention groups. In the exercising group, the proportion f episodes classified as “the common cold” was 35% (23/ 5), whereas it was significantly higher in the stretching roup: 67% (47/70) (P [2-t] .0004, Fisher exact test). onsequently, the more severe episodes were substantially ore frequent in the exercising group (65% vs 33%), sugesting that exercise might, in fact, have caused harm by aking upper respiratory infections more severe.
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متن کاملExercise, Vitamins and Respiratory Tract Infections [letter to the Editor] Pre-print Version of the Manuscript
To the Editor: Chubak et al. 1 reported that moderate intensity exercise training reduced common cold incidence but had no effect on the total incidence of upper respiratory infections. As a motivation for the trial, they cited two randomized 3-4 month trials 2,3 which, however, did not find statistically significant effect on upper respiratory infection incidence from moderate exercise, but th...
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تاریخ انتشار 2007