本研究の目的は，健常成人女性の足圧中心（COP：Center of pressure）軌跡を調査し，COP軌跡を内外側偏位の観点から分類する方法を検討する事である。対象は健常成人女性75名とし，足底圧測定装置を用いて歩行時COP軌跡を測定し，さらにCOPの位置座標を用いた独自の分類条件により，対象者のうち平均的な軌跡を描く群，内外側へ偏位を示す群への分類を試みた。分類の結果，各群はそれぞれ異なる特徴的なCOP軌跡を示した。今回の分類方法によって対象者をCOP軌跡の内外側の偏位により分類することができたため，今後はCOP軌跡の特性毎に足底板が歩行時COP軌跡に及ぼす影響を検討する事が課題である。
[Purpose] In the present study, gait analysis was conducted using a compact accelerometer for analyzing the peak acceleration value of the lower extremity during walking by juvenile patients suffering from chronic sports knee injury to the knee extensor mechanism, through lower extremity malalignment and other causes. [Subjects] The painful knees group included 13 subjects with 13 lower extremities, while the control group included 12 subjects with 12 lower extremities and normal healthy lumbar regions and lower extremity. [Methods] We mounted a tri-axial accelerometer on the lateral malleolus ankle joint and the head of the fibula. The peak acceleration values of the forward and backward components, perpendicular component and mediolateral component during the stance phase were analyzed from acceleration waveforms. [Results] Backward-peak and revised medial-peak of the sensor mounted on the head of the fibula and lateral-peak of the sensor mounted on the lateral malleolus ankle joint were significantly large in the painful knees group as compared to the control group. [Conclusion] Significant increase in peak acceleration as observed in the painful knees group shows that strong stress is generated in the forward-backward and mediolateral directions in knee joints. This is in agreement with the condition of dynamic malalignment such as varus-valgus movements of knee joints, which are considered to be the causes of knee extensor mechanism disorders.
Abstract Background Trans-radial access (TRA) has been established as a safe and established approach for invasive coronary catheter procedures. However, protocols for post-procedural hemostasis varies depending on institutes and an evidence-based protocol is lacking. Purpose The objective of this study was to investigate the clinical implications of procedural hemostasis. Methods Consecutive patients who were referred to outpatient catheter examination before and after April 2018 were treated with an old and a new protocol, respectively. In both protocols, we used the same commercially available hemostasis band with injecting an air of 16 ml for hemostasis. In the old protocol, the amount and timing of deflation were fixed, whereas the air was removed as much as possible for every 30 minutes in the new protocol. Time to complete hemostasis, the rate of major bleeding, and the rate of radial artery occlusion (RAO) at 6 months after the catheter examination were compared between the protocols. Results Total of 1,843 (71±10 years old, 77% male) patients was included in the study. Between patients in the old and the new protocol group (n=1,000 and 843, respectively), there was no significant difference in age, gender, body size, or systolic blood pressure. The new group had significantly higher prevalence of diabetes (47% vs 39%, p=0.002), slightly larger sheath size (4.1±0.3 vs 4.0±0.2 Fr, p<0.001), and lower rate of dual antiplatelet therapy (DAPT: 24% vs. 35%, p<0.001). Time for complete hemostasis was about one-third with the new protocol compared with the old protocol (65±32 vs. 190±16 min, p<0.001) and there was no major bleeding in either group. The rate of radial artery occlusion was 0.7% and 9.8% in the old and the new group (p<0.001). Multivariate analysis showed that the significant predictor of prolonged hemostasis time were the old protocol (odds ratio: OR 80.5, p<0.001) and the prescription of DAPT (OR 2.9, p<0.001), while the factors associated with higher risk of radial occlusion were the old protocol (OR 13.9, p<0.001), the number of previous TRA (OR 1.1, p<0.001), and smaller body size (OR 0.127 per 1 m2 increase p=0.005). Conclusions Our new protocol for hemostasis after TRA was strongly associated with shorter hemostasis time and a lower rate of radial artery occlusion. This approach will decrease the post-procedural hospital time with even fewer complication rates. Study outline Funding Acknowledgement Type of funding source: None
[Purpose] The purpose of this study was to determine the effect of various hand position widths during the push-up plus (PUP) exercise on the activity of the scapular stabilizing muscles and other upper-extremity muscles involved in the exercise. [Subjects and Methods] Nine healthy men participated in our study. The PUP exercise was performed on a stable surface in seven different hand positions, namely shoulder width (SW), and narrower SW (NSW) and wider SW (WSW) at 10%, 20%, and 30%. Surface electromyography was used to measure the muscle activities and muscle ratio of the upper trapezius (UT), middle trapezius, lower trapezius (LT), serratus anterior (SA), pectoralis major, deltoid anterior, latissimus dorsi (LD), and triceps muscles. [Results] The SA and LD muscle activities significantly decreased in the 30% NSW and 20% WSW hand positions, respectively. The UT/LT muscle ratio significantly increased in the 30% WSW hand position. [Conclusion] The results of this study suggest that during the PUP exercise, the SW hand position should be used. In the 30% NSW hand position, the SA muscle activity decreased, and the UT/ LT ratio increased in the 30% WSW hand position.
[Purpose] This study aimed to clarify the relationship between scapular dyskinesis and shoulder external rotation strength and muscle activity. [Subjects and Methods] Both shoulders of 20 healthy males were evaluated. They were classified into 19 normal, 8 subtly abnormal, and 13 obviously abnormal shoulders using the scapular dyskinesis test. Subtly abnormal shoulders were subsequently excluded from the analysis. Shoulder external rotation strength and muscle activity (infraspinatus, serratus anterior, upper, middle, and lower trapezius) were measured in 2 positions using a handheld dynamometer and surface electromyography while sitting in a chair with shoulder 0° abduction and flexion (1st position), and while lying prone on the elbows with the shoulders elevated in the zero position (zero position). The strength ratio was calculated to quantify the change in strength between the positions (zero position / 1st position). [Results] In the obviously abnormal shoulder group, the strength in the 1st position was significantly stronger, the strength ratio was significantly smaller, and the serratus anterior in the zero position showed significantly lower activity than the normal shoulder group. [Conclusion] In shoulder external rotation in the zero position, in obviously abnormal shoulders, the serratus anterior is poorly recruited, weakening the shoulder external rotation strength.
[Purpose] The purpose of this study was to examine the position of the distal fibula in subjects with sub-acute lateral ankle sprain (LAS) and to determine if a relationship exists between the amount of swelling and fibular position. [Subjects] The subjects participating in this study were ten patients with unilateral sub-acute LAS (the isolated anterior talofibular ligament injury: LAS group) and ten healthy persons (control group). [Methods] We measured subject’s fibular position and the amount of ankle swelling. The fibular position was measured as the distance between the lowest point of the lateral malleolus and the vertical line through the posterior margin of the calcaneus. Swelling was measured by the figure-of eight methods. [Results] The fibular position within the LAS group was significantly more anterior in the sprained ankles (43.7 ± 8.3 mm) than in the contralateral uninjured ankles (38.8 ± 7.6 mm). Additionally, sprained ankles were significantly more anterior than the side-matched ankle of the controls (37.4±4.2 mm). Spearman’s rank correlation coefficient revealed a positive correlation between fibular position and swelling (r=0.688). [Conclusion] The ankles with more swelling had a more anteriorly positioned fibula. This positional fault may be acutely maintained by the swelling.
Background, Osgood-Schlatter disease is a common overuse injury, and motor coordination is discussed as a risk factor; however, no reports have examined motor coordination in young soccer players with Osgood-Schlatter disease. This study aimed to investigate the difference in motor coordination between Osgood-Schlatter disease-affected and non-affected soccer players on a junior youth soccer team. MethodsThis cross-sectional study investigated 35 young soccer players of 12-15 years of age, who completed a self-administered questionnaire covering general information, injury history, and athletic experience. An inertial measurement unit was attached to the participant's chest, lumbar spine, pelvis, thigh, and lower leg. The sagittal tilt angle of each body segment during squatting was analyzed. The continuous relative phase was calculated using the sagittal plane tilt angle. The mean absolute relative phase and continuous relative phase variabilities were calculated and compared between Osgood-Schlatter disease-affected and non-affected players. FindingsThe sagittal plane tilt angle of each body segment during static standing and maximum flexion did not differ between the two groups. However, the Osgood-Schlatter disease group had significantly less continuous relative phase variability between the lumbar spine and pelvis (P<0.01, Cohen's d=0.91). The Osgood-Schlatter disease group had significantly fewer participants with other sports experience and more participants with a history of Sever's disease. InterpretationParticipants who develop Osgood-Schlatter disease may have dysfunctional lower trunk and hip muscles during squatting. It is suggested that a variety of physical activities should be performed in the junior age group to allow players to acquire a variety of movement patterns.
'%3e%3cpath fill='%23c4272f' d='M0 0h960v480H0z'/%3e%3cpath fill='%23015197' d='M320 0h320v480H320z'/%3e%3ccircle cx='160' cy='164' r='44'/%3e%3ccircle cx='160' cy='144' r='48' fill='%23c4272f'/%3e%3ccircle cx='160' cy='152' r='32'/%3e%3cpath d='M140 92a20 20 0 0 0 40 0c0-8-5-9-5-12s3-7-3-12c3 5-2 6-2 11s2 5 2 9a4 4 0 0 1-8 0c0-4 4-8 4-14s-1-8-4-13-8-9-4-13c-6 2-3 10-3 15s-4 8-4 14 3 7 3 11a4 4 0 0 1-8 0c0-4 2-4 2-9s-5-6-2-11c-6 5-3 9-3 12s-5 4-5 12ZM72 216v192h40V216Zm136 0v192h40V216Zm-88 32v16h80v-16Zm0 112v16h80v-16Zm0-144h80l-40 24Zm0 168h80l-40 24Z'/%3e%3c/g%3e%3cg stroke='%23c4272f' stroke-width='24'%3e%3ccircle cx='800' cy='1560' r='212'/%3e%3cpath fill='none' d='M800 1348a106 106 0 0 1 0 212 106 106 0 0 0 0 212'/%3e%3c/g%3e%3c/g%3e%3cg fill='%23c4272f'%3e%3ccircle cx='800' cy='1454' r='40'/%3e%3ccircle cx='800' cy='1666' r='40'/%3e%3c/g%3e%3c/svg%3e)