背景與目的:臨床上需要研製一個壓力回饋系統監測受試者執行核心運動峙的腰椎骨盆位置。本研究的 目的是要驗證以新壓力回饋系統，應用於三類不同的腹部核心穩定肌群肌肉表現的施測者內與施測者闊的測試 信度。方法: 30 位健康受試者(37.0 :l: 1 3.3 歲) 進行腹部核心穩定肌群肌肉測試，壓力回饋系統感測氣囊緊貼 於受試者下背部監測腰椎骨盆位置，於仰臥姿勢下進行三類測試: (1) 骨盆故傾測試; (2) 核心穩定耐力測試， (3) 核心穩定肌力測試。由兩位受過訓練的物理治療系學生執行所有測試，在施測者內信度部分﹒同一位施測 者會在3 至7 天內完成兩次測試;而施測者問信度，則是在受試者接受第一次測試的當天即完成兩次測試。結 果:在骨盆後傾測試的施測者內與施測者問信度分析結果，級肉相關係數值分別為0.91 與0.92 ;標準測量誤 差分別為8.9 與8.1 mmHg 。在核心穩定耐力測試的施測者內與施測者問信度值分別為0.84 與O目的;誤差分別 為19.4 秒與1 1.0 秒。在核心穩定肌力同一施測者或不同施測者兩次測量結果的相關性與一致性之信度指標值 皆在高度或良好以上(0.80 ~ 0.95; 0.71 - 0.91) ，所布測試皆顯示極佳信度。結論與臨床意義:本研究誼賓新型 的壓力回饋系統在執行骨盆後傾、核心穩定肌力與耐力的測試結果都呈現良好的信度，物理治療師可使用此壓 力回饋系統測量腹部肌群穩定腰椎與骨盆的能力。( 物理治療2016;4 1 (2):64-84)

Background anti purposes： We designed a new pressure biofeedback system to monitor lumbopelvic position during core stabilization exercises. This study aims at examining the inter- and intra-rater reproducibility of the pressure biofeedback system in three-class core stability tests. Methods: Thirty healthy individuals (average age: 37.0 ± 13-3 years old) were recruiccd. The air bag was placed in the lumbopelvic region to monitor t!ic position during core stability tests. Three tests were performed in supine position below: (1) Pelvic posterior tilt test, (2) Core endurance test, (3) Core strength test. Two well-trained students who major in physical therapy were responsible for executing the trials. Tlie intra-rater reliability test was done by tlie same assessor within 3 to 7 days. 'Ihe inrer-ratcr reliability was rested on the first-time trial. Results: For the pelvic posterior tilt test, the intra-class correlation coefficients for intra-and inter-rater reliability were 0.91 and 0.92. Tlie standard errors of measurement (SEM) were 8,9 and 8.1 mmHg. For core endurance rest, the intra-rater reliability was 0,84 and the inter-rater was 0.95. Tlie SEM was 19.4 s and 11.0 s respectively. Regarding the reliability of core stiengch tests, the Spearman's rank correlation coefficients (rs) and the weighted Kappa (kw) values were high (1、： 0.80 - 0.95，lc„: 0.71 - 0.91). AI】the tests demonstrated great l.diability. Conclusion and clinical relevance: Hie study showed significant reproducibility of the new pressure biofeedback system in pelvic posterior tilt test, core stabilized strengch and endurance test. We suggest physical therapists use the system and above tests to clinically assess perfonnances of abdominal core stabilizers. (FJPT 2016;41 (2}:64-84)