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군인 근골격계 부상 예방운동의 체계적 문헌고찰 및 메타 분석
성호용 ( Hoyong Sung ),김건희 ( Geon Hui Kim ),이온 ( On Lee ),김재우 ( Jaewoo Kim ),김경배 ( Kyoung Bae Kim ),문효열 ( Hyo Youl Moon ),김연수 ( Yeon Soo Kim ) 대한스포츠의학회 2024 대한스포츠의학회지 Vol.42 No.1
Purpose: This study aimed to conduct a systematic literature review and meta-analysis of the exercise intervention effects for the prevention of musculoskeletal injuries in military personnel. Methods: Among studies that included military personnel as participants, we identified randomized controlled trials (RCTs) and cluster-RCT studies that used exercise interventions as a method for injury prevention. Exercise encompassed all types of physical activity, and the effect size was determined by the ratio of injuries between groups. Literature searches were conducted with search terms modified to ensure common inclusion of keywords such as “Soldier,” “Injury prevention,” and “Exercise.” For the analysis of potential factors, variables selected for group differentiation included gender, risk of bias, exercise volume, injury location, exercise type, and study design. Results: Among a total of 8,598 search results, 10 papers were finally confirmed. The meta-analysis of all 10 papers showed that there was no statistically significant injury prevention effect, and significant heterogeneity was observed among the studies (incidence rate ratio, 0.82; 95% confidence interval, 0.62-1.09, I2=83%). Subgroup analysis revealed a significant 44% reduction in injuries in studies where exercise volume for injury prevention was relatively high. However, no significant injury prevention effects were observed in other potential factors between groups. Conclusion: The results of this study suggest that the effectiveness of injury prevention exercises in military settings was not statistically significant. However, through the analysis of potential factors, it was confirmed that increasing the time spent on injury prevention exercises may have a preventive effect on injuries.
Geon Hui Kim,Hoyong Sung,Yeun Ryu,Jungjun Lim,Joon-Sik Kim,Hak Kyun Kim,Yeon Soo Kim 한국역학회 2021 Epidemiology and Health Vol.43 No.-
OBJECTIVES: The aim of this study was to identify the stepping cadence patterns in Korean adults by using objectively measured accelerometer data to analyze the time spent in each cadence category by sex and age. METHODS: During the 2014-2015 Korean National Health and Nutrition Examination Survey, 1,703 males and females aged 19-64 years provided at least 1 valid day of data (wearing an accelerometer ≥10 hr/d). The mean cumulative time and percentage per day in 8 cadence categories (0, 1-19, 20-29, 30-59, 60-79, 80-99, 100-119, and ≥120 steps/min) by sex and age group were calculated. RESULTS: Cumulative time and percentage per day decreased across the incremental cadence categories. Participants spent 360.08±2.56 min/d in the non-movement cadence category and 361.50±2.28 min/d in the incidental movement cadence category. However, they spent only about 18.1 min/d (2.1%) at ≥100 steps/min. Males spent significantly more time in the cadence categories of sporadic movement, purposeful steps, slow walking, and medium walking, but the other categories, except for brisk walking, had higher values in females (p<0.001). The older age group spent less time in non-movement cadence categories, and the youngest and oldest groups spent more time at a higher cadence (≥100 steps/min) than the other age groups. Similar patterns were found in a subgroup analysis by sex. CONCLUSIONS: Korean adults spent most of their time at a low cadence and only a few minutes at a high cadence (≥100 steps/min); this trend was consistent across sex and age groups.
Kim, Young Uk,Kim, Byung-Seok,Lim, Hoyong,Wetsel, Rick A.,Chung, Yeonseok The Korean Society of Applied Pharmacology 2017 Biomolecules & Therapeutics(구 응용약물학회지) Vol.25 No.2
$CXCR5^+$ T follicular helper (Tfh) cells are associated with aberrant autoantibody production in patients with antibody-mediated autoimmune diseases including lupus. Follicular regulatory T (Tfr) cells expressing CXCR5 and Bcl6 have been recently identified as a specialized subset of $Foxp3^+$ regulatory T (Treg) cells that control germinal center reactions. In this study, we show that retroviral transduction of CXCR5 gene in $Foxp3^+$ Treg cells induced a stable expression of functional CXCR5 on their surface. The Cxcr5-transduced Treg cells maintained the expression of Treg cell signature genes and the suppressive activity. The expression of CXCR5 as well as Foxp3 in the transduced Treg cells appeared to be stable in vivo in an adoptive transfer experiment. Moreover, Cxcr5-transduced Treg cells preferentially migrated toward the CXCL13 gradient, leading to an effective suppression of antibody production from B cells stimulated with Tfh cells. Therefore, our results demonstrate that enforced expression of CXCR5 onto Treg cells efficiently induces Tfr cell-like properties, which might be a promising cellular therapeutic approach for the treatment of antibody-mediated autoimmune diseases.
Hoyong Kim,Han-Seob Jeong,Seon-Hong Kim,Se-Yeong Park,Joon Weon Choi,In-Gyu Choi 한국산림바이오에너지학회 2020 산림바이오에너지 Vol.30 No.2
In this study, ethanol organosolv lignin (EOL) yield and structural characteristics of EOL depending on the production condition were evaluated to understand the lignin fractionation behavior and to determine the optimal condition for the production of phenolic compounds. EOL yield was enlarged until combined severity factor (CSF) reached 1.2, while molecular weight and nitrobenzene oxidation (NBO) yield of EOL were declined more than a half compare to those from CSF 0 to 0.6. Both EOL and NBO yields were predictable as a function of CSF with very high coefficient of determination. Concentration of phenolic compounds released from pyrolysis GC/MS was relatively stable until reaching CSF 1.5. However, it was significantly affected by not only CSF but also the concentration of acid used for the fractionation of EOL. Therefore, in order to produce phenolic compounds from EOL, production condition should be controlled between CSF 1.2 and 1.5 with low acid concentration.
Long-Term Follow-Up Results of Anterior Cervical Inter-Body Fusion with Stand-Alone Cages
Kim, Woong-Beom,Hyun, Seung-Jae,Choi, Hoyong,Kim, Ki-Jeong,Jahng, Tae-Ahn,Kim, Hyun-Jib The Korean Neurosurgical Society 2016 Journal of Korean neurosurgical society Vol.59 No.4
Objective : The purpose of this study was to evaluate long-term follow-up radiologic/clinical outcomes of patients who underwent anterior cervical discectomy and inter-body fusion (ACDF) with stand-alone cages (SAC) in a single academic institution. Methods : Total 99 patients who underwent ACDF with SAC between February 2004 and December 2012 were evaluated retrospectively. A total of 131 segments were enrolled in this study. Basic demographic information, radiographic [segmental subsidence rate, fusion rate, C2-7 global angle, and segmental angle changes)/clinical outcomes (by Odom's criteria and visual analog score (VAS)] and complications were evaluated to determine the long-term outcomes. Results : The majority were males (55 vs. 44) with average age of 53.2. Mean follow-up period was 62.9 months. The segmental subsidence rate was 53.4% and fusion rate was 73.3%. In the subsidence group, anterior intervertebral height (AIH) had more tendency of subsiding than middle or posterior intervertebral height (p=0.01). The segmental angle led kyphotic change related to the subsidence of the AIH. Adjacent segmental disease was occurred in 18 (18.2%) patients. Total 6 (6%) reoperations were performed at the index level. There was no statistical significance between clinical and radiological outcomes. But, overall long-term clinical outcome by Odom's criteria was unsatisfactory (64.64%). The neck and arm VAS score were increased by over time. Conclusion : Long-term outcomes of ACDF with SAC group were acceptable but not satisfactory. For optimal decision making, more additional comparative long-term outcome data is needed between ACDF with SAC and ACDF with plating.