Objectives To investigate relationship between iron deficiency of different degrees and physical performance and habitual activity of migrant schoolchildren at the age of 11-14 years. Methods Ninety one randomly selec...Objectives To investigate relationship between iron deficiency of different degrees and physical performance and habitual activity of migrant schoolchildren at the age of 11-14 years. Methods Ninety one randomly selected schoolchildren were divided into three groups according to their iron status. Iron status including hemoglobin （Hb）, serum ferritin （SF）, serum iron （SI） and sTfR was determined. Physical performance tests included maximum oxygen consumption （VO2max） and maximum work time. Energy expenditure （EE） and daily physical activity were estimated by recording 24-h heart rate （HR）. Dietary intake was assessed with frequency questionnaires, and physical activity level was estimated with frequency and physical activity questionnaires. Results Severe iron deficiency （IDA） impaired the aerobic capacity and habitual physical activity. When fat-free mass （FFM） was considered, VO2max （VO2max/FFM） was significantly lower in the iron-marginal group than in the iron-adequate groups among girls （P=0.02）, but such a deference was not found among boys （P=0.28）. Aerobic activity and EE at leisure were significantly lower in the severe iron deficient group than in the marginal iron deficient and iron adequate groups. Net HR at leisure time was correlated with lib, log SF, body weight, and FFM （P〈0.05）. Conclusion The functional effect of iron deficiency on physical performance and habitual physical activity rely on the degree of current iron deficiency. Severe iron deficiency significantly impairs both aerobic capacity and habitual physical activity. Iron-marginal deficiency impairs VO2max/FFM in girls, rather than in boys.展开更多
Drawing on the survey results and interview data of 897 rural migrant workers in Nanchang, Jiangxi Province, the authors conduct an in-depth analysis of the background and current living conditions of rural migrant wo...Drawing on the survey results and interview data of 897 rural migrant workers in Nanchang, Jiangxi Province, the authors conduct an in-depth analysis of the background and current living conditions of rural migrant workers in the city; including their gender, age, educational background, vocation, length of employment, wage, work stability, work safety, housing conditions, medical treatment, leisure activities and life satisfaction. The findings indicate that migrant workers in Nanchang face difficult conditions and that the government and society must take measures to improve their situation.展开更多
Yuangang Village and Shipai Village in Tianhe District,Guangzhou City were taken for example to investigate living status and features of young migrant workers,and their satisfaction at living environment,dwelling nee...Yuangang Village and Shipai Village in Tianhe District,Guangzhou City were taken for example to investigate living status and features of young migrant workers,and their satisfaction at living environment,dwelling needs and willingness,on the basis of questionnaire survey and in-depth interview. According to comparative analysis of current situation and needs,housing problems of young migrant workers were summarized,and attentions in handling migrant workers' housing problems were given,i.e. diverse housing locations,beautifi cation of living environment,enriching housing types,equalization of public facilities,diverse housing supply modes.展开更多
Migrant worker is the product of urban and rural dual structure,and also an important force promoting social development.Paying close attention to living condition and willingness of migrant workers is favorable for i...Migrant worker is the product of urban and rural dual structure,and also an important force promoting social development.Paying close attention to living condition and willingness of migrant workers is favorable for improving people's livelihood and stabilizing society.Panyu District of Guangzhou City has gathered numerous migrant workers.Therefore,it randomly selected 600 migrant workers in Panyu District and took them as objects of questionnaire.Through research,it is found that current living condition of migrant workers is not optimistic,and it is expected that their housing problem can be solved.展开更多
基金funded by the Global Alliance for Improved Nutrition, NFA-CHN-FE-2003-01-00
文摘Objectives To investigate relationship between iron deficiency of different degrees and physical performance and habitual activity of migrant schoolchildren at the age of 11-14 years. Methods Ninety one randomly selected schoolchildren were divided into three groups according to their iron status. Iron status including hemoglobin （Hb）, serum ferritin （SF）, serum iron （SI） and sTfR was determined. Physical performance tests included maximum oxygen consumption （VO2max） and maximum work time. Energy expenditure （EE） and daily physical activity were estimated by recording 24-h heart rate （HR）. Dietary intake was assessed with frequency questionnaires, and physical activity level was estimated with frequency and physical activity questionnaires. Results Severe iron deficiency （IDA） impaired the aerobic capacity and habitual physical activity. When fat-free mass （FFM） was considered, VO2max （VO2max/FFM） was significantly lower in the iron-marginal group than in the iron-adequate groups among girls （P=0.02）, but such a deference was not found among boys （P=0.28）. Aerobic activity and EE at leisure were significantly lower in the severe iron deficient group than in the marginal iron deficient and iron adequate groups. Net HR at leisure time was correlated with lib, log SF, body weight, and FFM （P〈0.05）. Conclusion The functional effect of iron deficiency on physical performance and habitual physical activity rely on the degree of current iron deficiency. Severe iron deficiency significantly impairs both aerobic capacity and habitual physical activity. Iron-marginal deficiency impairs VO2max/FFM in girls, rather than in boys.
文摘Drawing on the survey results and interview data of 897 rural migrant workers in Nanchang, Jiangxi Province, the authors conduct an in-depth analysis of the background and current living conditions of rural migrant workers in the city; including their gender, age, educational background, vocation, length of employment, wage, work stability, work safety, housing conditions, medical treatment, leisure activities and life satisfaction. The findings indicate that migrant workers in Nanchang face difficult conditions and that the government and society must take measures to improve their situation.
基金Sponsored by Outstanding Young Innovative Talent Cultivation Program of Guangdong Colleges and Universities(WYM11049)National Undergraduate Innovation and Entrepreneurship Training(1184512267)
文摘Yuangang Village and Shipai Village in Tianhe District,Guangzhou City were taken for example to investigate living status and features of young migrant workers,and their satisfaction at living environment,dwelling needs and willingness,on the basis of questionnaire survey and in-depth interview. According to comparative analysis of current situation and needs,housing problems of young migrant workers were summarized,and attentions in handling migrant workers' housing problems were given,i.e. diverse housing locations,beautifi cation of living environment,enriching housing types,equalization of public facilities,diverse housing supply modes.
文摘Migrant worker is the product of urban and rural dual structure,and also an important force promoting social development.Paying close attention to living condition and willingness of migrant workers is favorable for improving people's livelihood and stabilizing society.Panyu District of Guangzhou City has gathered numerous migrant workers.Therefore,it randomly selected 600 migrant workers in Panyu District and took them as objects of questionnaire.Through research,it is found that current living condition of migrant workers is not optimistic,and it is expected that their housing problem can be solved.
