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좌식습관과 신체활동 수준이 아동청소년의 척추 및 골반변형에 미치는 영향

송문구 ( Mun-ku Song ),공지영 ( Ji-young Kong ),박지현 ( Ji-hyun Park ),신철호 ( Chul-ho Shin ),강현식 ( Hyun-sik Kang ) 한국운동생리학회(구 한국운동과학회) 2017 운동과학 Vol.26 No.1
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PURPOSE: This study investigated the association between the modifiable risk factors and spinal deformations in children. METHODS: Children (152 boys, 153 girls) were recruited to participate in the study. Physical activity level, sitting time, and posture were assessed with a questionnaire. Spinal parameters such as scoliosis angle (SA), pelvic oblique (PO), and pelvic torsion (PT) were measured with the Formetric 4D. Children were classified as uncrossed and cross-legged sitting groups according to postures, as sedentary, moderately-active, and highly-active groups according to physical activity levels, and as low, mid, and high groups according to sitting time. Logistic regression was used to determine the odds ratio (OR) and 95% confidence interval (95% CI) of pelvic deformations. RESULTS: Children with cross-legged sitting posture had significantly higher values in SA and PO than children with uncrossed sitting posture. Significant differences in SA, PO, and PT were found between the activity-based subgroups and a significant difference in PT between the sitting time-based subgroups. Compared with uncrossed sitting children (reference, OR=1), cross-legged sitting children had a significantly risk (OR=3.153, 95% CI=1.707-5.822) of PO deformation. Compared with highly active children (reference, OR=1), sedentary children had a significantly higher risk (OR=4.115, 95% CI=1.496-11.321) of PO deformation. In addition, moderately-active and sedentary children had significantly higher risks (OR=3.987 and 95% CI=2.044-7.777 and OR=5.806 and 95% CI=2.675-12.601, respectively) of PT deformation as compared with highly-active children (reference, OR=1). CONCLUSIONS: The current findings suggest that crossed-legged sitting posture and decreased physical activity are two of modifiable risk factors for spinal deformations in children.
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K리그1 프로축구선수들의 넙다리네갈래근과 뒤넙다리근의 등속성 근력 값

송문구 ( Mun-ku Song ) 한국스포츠정책과학원 2021 체육과학연구 Vol.32 No.4
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PURPOSE This study aimed to present isokinetic quadriceps and hamstring muscle strength values in K league 1 (K1) professional soccer players and compare these results to those of published studies. METHODS A total of 31 K1 soccer players (age 24.5±4.2) without a history of lower limb injury were included in this study. Isokinetic knee strength tests were implemented at a velocity of 60°·s-1 and 180°·s-1 for both dominant (D) and non-dominant (ND) legs using a dynamometer. Strength variables included peak torque (PT), body mass normalized PT (NPT), bilateral strength difference (BD), and hamstring to quadriceps strength (H/Q) ratio. RESULTS At 60°·s-1 velocity, the NPTs of the quadriceps were 3.39N·m·kg-1 and 3.33N·m·kg-1 for D and ND legs, respectively, and those of the hamstrings were 2.00N·m·kg-1 and 1.89N·m·kg-1 for D and ND legs, respectively. At 180°·s-1 velocity, the NPTs of the quadriceps were 2.31N·m·kg-1, 2.27N·m·kg-1 for D and ND legs, respectively, and those of the hamstrings were 1.42N·m·kg-1, 1.39N·m·kg-1 for D and ND legs, respectively. At all velocities, the BDs of quadriceps and hamstring muscles ranged from 6.6-7.8%, and H/Qs ranged from 57-62%. Compared to previous studies that did not consider the history of injury, this study showed lower levels of BD (less than 10%) and higher levels of NPT. CONCLUSIONS The presented isokinetic quadriceps and hamstring muscle strength values can be used as reference values for the isokinetic knee strength of K1 professional soccer players. [목적] 본 연구의 목적은 K리그1 프로축구선수들의 넙다리네갈래근과 뒤넙다리근의 등속성 근력 데이터를 제시하고, 선행 연구들과 비교하는 것이었다.[방법] 하지 부상 이력을 고려하여, 총 31명의 프로축구선수가 본 연구의 분석대상에 포함되었다. 각속도 60°·s-1 및 180°·s-1에서 우세측과 비우세측의 무릎관절 굼힘과 폄의 등속성 근력을 측정하였고, 피크토크(peak torque, PT), 체중당 피크토크(normalized PT, NPT), 양쪽 근력 차이(bilateral strength difference, BD), 뒤넙다리근 대 넙다리네갈래근의 근력 비율(hamstring to quadriceps ratio, H/Q 비율)을 측정 변인으로 하였다.[결과] 각속도 60°·s-1에서, 넙다리네갈래근의 NPT는 우세측·비우세측 각각 3.39N·m·kg-1, 3.33N·m·kg-1으로 나타났으며, 뒤넙다리근은 각각 2.00N·m·kg-1, 1.89N·m·kg-1으로 나타났다. 각속도 180°·s-1에서, 넙다리네갈래근의 NPT는 우세측·비우세측 각각 2.31N·m·kg-1, 2.27N·m·kg-1으로 나타났으며, 뒤넙다리근은 각각 1.42N·m·kg-1, 1.39N·m·kg-1으로 나타났다. 측정한 모든 각속도에서, 넙다리네갈래근과 뒤넙다리근의 BD는 6.6~7.8% 범위로, H/Q 비율은 57~62% 수준으로 나타났다. 부상 이력을 고려하지 않은 선행연구들에 비해 본 연구에서는 더 낮은 수준의 BD (<10%) 및 더 높은 수준의 NPT 값이 나타났다.[결론] 본 연구에서 제시된 넙다리네갈래근과 뒤넙다리근의 등속성 근력 값은 K리그1 프로축구선수들의 무릎관절 등속성 근력 평가 시 참고값(reference values)으로서 사용될 수 있을 것이다.

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