ABSTRACT
Objective To investigate the level of health literacy of residents in Jing′an District of Shanghai, providing basis for the intervention programs of health literacy. Methods By using Probability Proportionate to Size Sampling method, 1 760 residents aged 15-69 were surveyed through face-to-face interviews. Results The overall level of adjusted health literacy of Jing′an District was 31.89%.The health literacy level of basic health concepts and knowledge, health lifestyle and behaviors, and health related skills were 46.30%, 27.02%, 43.44%, respectively.The 6 health issues regarding awareness of health literacy from high to low were safety and first aid (65.49%), scientific attitude towards health(60.75%), health information literacy(56.86%), chronic diseases prevention (34.22%), basic medical care(31.10%), and infectious diseases prevention (24.28%).People of 65-69 years old had the lowest health literacy level (χ2=22.03, P < 0.05).Those with collage degree or above had higher health literacy level (χ2=43.54, P < 0.05).In terms of occupation, civil servant had higher health literacy level(χ2=22.78, P < 0.05). Conclusion The level of health literacy in Jing′an District is on a steady rise, however, intensive intervention is needed for residents with lower health literacy.
ABSTRACT
Objective: To study the effect of 4-6 weeks' treadmill training of male SD rats on the contractile function of their gastrocnemius myosin heavy chain (MHC). Methods: Forty male SD rats were randomly divided into control group and training group. The treadmill training of the training group rats was incessantly performed for 4-6 weeks at an intensity of about 75% VO 2max (18.5-24 m/min, gradient of 0°, each training session lasting 50 minutes, twice a day). The content of gastrocnemius MHC mRNA was tested by reverse transcription polymerase chain reaction (RT-PCR), and the changes of muscle fibre and its cross-section area (CSA) were measured using immunohistochemistry. Electric stimulation tests were used to determine the maximal tension of isometric contraction of the post-training gastrocnemius. Results: Circled digit one After continuous treadmill training for 4-6 weeks, we found that the content of the total MHC, MHC I, MHC II x, MHC II a mRNAs was 105%, 105%, 109% and 108% of that in the resting control group, respectively, and the MHC II b mRNA content did not change significantly. The percentage of MHC I mRNA in the total MHC mRNA increased while that of MHC II mRNA decreased after aerobic training. Circled digit two The slow type of fibre type I was the main part of the MHC after training and the CSA of the muscle fibres increased simultaneously. Circled digit three The maximal tension of isometric contraction by pulse stimulation of square wave in the training group increased significantly compared with that in the control group (P<0.01). Conclusion: The findings indicate that aerobic exercise may promote an increase in the contractile function of MHC.