Intra- and Inter-session Reliability of Static and Dynamic Postural Control in Participants with and without Patellofemoral Pain Syndrome

Abstract

Purpose: To determine the intra-and inter-session reliability of balance performance in people with patellofemoral pain syndrome (PFPS) and matched controls. Methods: In this methodological study, single-leg-stance performance of 15 participants with unilateral PFPS and 15 healthy matched controls was assessed using the Biodex Balance System (BBS) under 4 task difficulty levels (static and dynamic, with and without visual feedback). Intra-class correlation coefficients (ICCs), standard errors of measurement, and coefficients of variation were calculated for the overall stability index, anteriorposterior stability index, and medial-lateral stability index. Results: Static and dynamic postural performance during single-leg stance showed moderate to very high reliability in the PFPS group (ICCs ¼ 0.53-0.96) and in healthy control participants (ICCs ¼ 0.51-0.91). Both measures were more reliable with eyes closed than with eyes open. Conclusion: BBS stability indices appear to have acceptable reliability in people with PFPS, particularly in more challenging conditions, and may be incorporated into the evaluation and rehabilitation of this patient group.

Gender-Related Differences in Reliability of Thorax, Lumbar, and Pelvis Kinematics During Gait in Patients With Non-specific Chronic Low Back Pain

“…Statistical significance was considered at p<0.05 [ 21 30 ]. SEM, SEM%, and MDC were calculated using Microsoft Excel 2010 [ 31 ].…”

Effects of Indoor Soccer Training on Physical Fitness Levels in Visually Impaired Athletes

“…Bu cihaz statik ve dinamik dengenin objektif değerlendirilmesinde kullanılan, mediolateral ve anteroposterior yönlerde serbest harekete izin veren geçerlilikgüvenirlilik çalışması yapılmış bir cihazdır. [14][15][16][17] Sekiz farklı rezistans ile platformda dengede kalmak fizyoterapist tarafından zorlaştırılabilir. Biodex Denge Sistemi'nde skorların artması, dengenin kötüleştiğini göstermektedir.…”

“…Yirmi saniyelik test süresi sonunda hem statik hem de dinamik denge için tüm bireylerin genel stabilite indeksi, anteroposterior stabilite indeksi ve mediolateral stabilite indeksi skorları kaydedildi. [14][15][16][17]…”

Clinician's Commentary on Akhbari et al.

“…[2][3][4][5][6][7] Overall, this body of work has sought to better understand the measurement properties of biomechanical variables that provide insight into the fundamental mechanisms that control postural stability. Although these biomechanical variables have shown promise for measuring clinical change over time, [1][2][3][4][5][6][7] they have not often been examined in the context of randomized controlled trials. 8 In the context of upright stance, postural stability is often defined as the ability of the nervous system to control the position of the centre of mass (COM) in relation to the base of support (BOS).…”

“…Examples of this emerging technology include force sensors embedded in active gaming platforms, shoes, and walking surfaces; [11][12][13] wireless accelerometers and inertial measurement units; 14 and balance assessment platforms. 1,15 Such technologies offer clinical researchers opportunities to bridge the gap between fundamental and translational research by accessing information once exclusive to the biomechanical laboratory environment. However, advances in this emerging area of clinical research will be achieved only through significant and sustained commitment to establishing the measurement properties of the biomechanical variables and integrating these variables into long-term prospective observational and randomized controlled trials.…”