Cardiorespiratory burden of brass neck coils placed on Kayan Karen long-neck women of Thailand.

There is only scarce information regarding the physiological and health impact of lifelong wearing of the neck brass coils in Karen Kayan women. The purpose of this study was to determine the influence of wearing brass neck coils on cardiorespiratory and cerebrovascular functions in long-neck Karen women. A total of 28 Karen women (aged 23-66 years) were studied. Fourteen Karen women who had been wearing neck brass coils were compared with 14 Karen women with no neck coils. We also studied 14 age-matched city-living controls. Radiographic examination of 2 older Karen women wearing neck coils showed low levels of the clavicles. There were no group differences in resting heart rate and brachial-ankle pulse wave velocity. Both systolic and diastolic blood pressure was greater and functional capacity was lower in both Karen women than city-living controls (all p < 0.05). Karen women wearing neck coils demonstrated lower flow-mediated dilation, lung functions, including forced vital capacity and forced expiratory volume during the first second, and cerebral blood flow velocity than Karen women without neck coils (all p < 0.05). Karen women wearing neck coils demonstrate reduced endothelial and pulmonary functions as well as cerebral perfusion compared with age-matched Karen women without neck coils living in the same villages. Brass neck coils worn by Karen women may elevate risks of developing cardiopulmonary and cerebrovascular diseases. Novelty Cerebral blood flow velocity and macrovascular and microvascular functions were lower in Karen wearing neck coils. There appears to be substantial burden of brass neck coils exerted on physiological systems in Karen women.

Effects of two modes of exercise on physical fitness and endothelial function in the elderly: exercise with a flexible stick versus Tai Chi.

OBJECTIVE: Determine the effects of exercise with flexible stick training on physical fitness and endothelial function and compare it with Tai Chi training. MATERIAL AND METHOD: Thirty older women volunteered for the present study and were divided into EF group (EF: n=16; 70.3 + 2.5 yr) and TC group (TC: n=14; 69.5 +/- 4.5 yr). Both training groups performed training assigned protocol that consisted of 70% of maximal heart rate, 40 minutes per day, four days per week for 12 weeks. Health related physical fitness and biochemical data were assessed in all participants. Post-Occlusive Reactive Hyperemia (PORH) was used to monitor endothelial function by using a Laser-Doppler fluxmeter. RESULT: The health related physical fitness was significantly higher in the EF group (p < 0.05). Plasma malondialdehyde and von Willebrand factor, an indicator of free radical damage and endothelial dysfunction, respectively as well as cholesterol level were significantly lower (p < 0.05) in the EF group. The peak Laser-Doppler flux (LDF)/baseline LDE and recovery time were significantly improved after 12 weeks of EF training (p < 0.05). This was not observed after 12 weeks of TC training. CONCLUSION: EF, a Thai novel exercise that combined endurance and strength training was a more effective exercise modality than TC for improving physical fitness and endothelial function. It improved reactive oxygen species in the elderly.