ObjectiveTo observe the recovery of proprioception of the affected ankle over time after lateral ankle sprain accepting routine rehabilitation. MethodsFrom June, 2020 to June, 2022, 18 patients with lateral ankle sprain in Kunshan Rehabilitation Hospital underwent routine rehabilitation for twelve weeks. They were measured active and passive position sense of bilateral ankles using an isokinetic dynamometer before treatment, and four, eight and twelve weeks after treatment, respectively. ResultsThe active presentation difference of affected ankle reduced after treatment (F = 22.533, P < 0.001), but it was more than that of the healthy ankle at the same time (t > 4.419, P < 0.001). No significant improvement was found in passive presentation difference of affected ankle after treatment (F = 1.175, P > 0.05), and it was not significantly different from those of the healthy ankle at the same time (|t| < 0.646, P > 0.05). ConclusionProprioception of affected ankle has been impaired after lateral ankle sprain, and it can be recovered after rehabilitation, but cannot achieve the healthy level even after three months of training. Passive position sense as an index of proprioception needs more researches.

Objective To investigate the residential radon concentration in typical areas of Hubei Province and assess the dose hazards of radon to human body. Methods According to geographical location, five cities including Wuhan, Enshi, Shiyan, Xianning and Daye were selected, and the stratified cluster sampling and monitoring were conducted in accordance with the residential building structure. From April to July, 2019, RSKS standard detectors were placed in the bedroom or living room of the tested families. After continuously sampling for three months, those detectors were returned back to the laboratory for test readings using Radosys system. Results A total of 651 detectors were deployed in 577 households of 70 communities, and 634 detectors were recovered. The recovery rate of detectors was 97.4%. The indoor residential radon concentration in Hubei Province showed a logarithmic normal distribution, with a median (25% quantile and 75% quantile) of 40.52 (29.13,64.74) Bq/m3 and an annual effective dose of 2.02 mSv. The indoor radon concentrations in Wuhan and Enshi were significantly higher than those in Shiyan, Xianning and Daye (P<0.05). The indoor radon concentrations in brick wood or civil structures were significantly higher than those in reinforced concrete structures (P<0.05), and indoor radon concentration in the first floor was significantly higher than those in other floors (P<0.05). The indoor radon concentrations after 2010 were significantly lower than those between 2001 and 2010 (P<0.05). Conclusion The number of households with indoor radon concentrations exceeding the national limit in newly-built buildings accounted for 10.1%; The indoor residential radon concentration levels of in Hubei Province were influenced by building structure, age and floor.