Background: Children with type 1 diabetes (T1D) are at high risk of having insufficient physical activity during school days and, thus, the importance of special program in promoting regular physical exercise has been largely emphasized. Therefore, this study examined the levels of physical activity and glycemia control in children with T1D, with particular focus on the relative contributions of regular physical education and physical activity program during the diabetes camp.Material and methods: Ninety-eight children suffering from T1D for 3.0 ±1.4 years free of diabetic complications participated in the study. Glycemia, insulin doses and diet were monitored, and physical activity was repeatedly measured across school days (GrS) and during the diabetes camp (GrR).Results: Physical activity of T1D children during the diabetes camp program were significantly higher compared to their regular physical education program GrS (p < 0.001). The age of study participants had a significant impact on physical activity, glycemia and daily insulin doses.Conclusions: Physical activity of children and adolescents with type 1 diabetes is lower compared to reference ranges for healthy population. Our findings highlighted that diabetic camps-based physical activity, in addition to regular physical education classes, could be of heath benefit in children with T1D.

Given the previous evidence that breath-hold diving is a cause of physiological stress, this study aimed to determine whether a combination static and dynamic apnea would affect total oxidant status, nitric oxide, heat shock proteins and cardiovascular parameters in elite freedivers. Thirteen finalists of the World and European championships in swimming pool breath-hold diving participated in the study. Whole-body plethysmography and electrocardiography was performed to determine the cardiorespiratory variables at baseline and during the simulation static apnea. An assessment of the heart rate, blood oxygen saturation and biochemical variables was performed before and in response to a combination of a static followed by a dynamic apnea. Static and dynamic breath-holding had a significant effect on oxidative stress, as evidenced by an increase in the total oxidant status/capacity (p &lt; 0.001). The post apnea concentrations of heat shock proteins 27 (HSP27) were significantly elevated (p &lt; 0.03, but total antioxidant status (TAS), HSP90, HSP70, and nitric oxide (NO) changes were not significant. levels under the influence of the static and dynamic breath-hold protocol. A significant positive correlation between HSPs and TAS (r = 0.63; p &lt; 0.05) as well as NO levels was associated with beneficial cardiovascular adaptation. An increase in serum HSP27 levels mediated in nitric oxide levels could explain its important role in improving cardiovascular functions in elite freedivers. Further studies are necessary to explain the exact mechanisms of breath holds training of cardiovascular adaptation responsible for maintaining adequate oxygen supply in elite divers.

Background: Current research results indicate high adaptation of an organism to long-term apnoea. Breathing techniques allow increasing the volume of the inhaled air and thus prolong the breath-hold time at rest and during physical effort. The purpose of this study was to assess the impact of breath-hold on adaptations of the respiratory and circulatory systems and cardiopulmonary-respiratory reactions at rest and during physical effort in persons practising freediving. Material and methods:The study involved 17 athletes practising breath-hold diving, at the mean age of 38.4 ±8.4 years.Spirometry tests to evaluate static and dynamic lung indicators were conducted. The heart rate (HR), oxygen saturation (SpO 2 ), and the apnoea time in three breath-hold trials were measured: static dry STA-D, static with face immersed in water STA-I and dynamic (DYN-D). Results:The values of spirometry indicators were higher than the normal values at the appropriate peak expiratory flow (91.6 ± 27.2%). A significant effect of breath-hold on the HR was demonstrated in the STA-D test (W = 0.43, at p < 0.05) and STA-I (W = 0.51, at p < 0.05). The mean breath-hold time was significantly lower in the dynamic trial DYN-D vs STA-D (p < 0.001) and in STA-D Ex vs STA-I (P < 0.001). Higher mean values of SpO 2 were shown in DYN-D in comparison to STA-D (p < 0.05). Conclusions:The results of this study indicate that breath-hold training beneficially affects adaptation of the circulatory system, causing strong bradycardia and lower tolerance in response to prolonged apnoea during physical effort.