Publications by authors named "Siu N Fu"

Patients with knee osteoarthritis walk with reduced speed and knee flexion excursion in the early stance phase. A slow walking speed is also associated with falls in older adults. A novel vision-based smartphone application could potentially facilitate the early detection of knee osteoarthritis and fall prevention.

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Objectives: Elevated lumbar multifidus stiffness has been observed in populations with chronic low back pain (LBP). However, the modulation of deep (DLM) and superficial (SLM) lumbar multifidus stiffness, considering their distinct structural characteristics and functions, remains unaddressed, especially in athletes. This study aimed to compare differences in DLM and SLM stiffness in professional athletes from different sports with and without chronic LBP.

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  • The study compared diaphragm function in elite weightlifters aged 16-26 with chronic low back pain (LBP) to those without, examining how it impacts sports performance.
  • Results showed that weightlifters with chronic LBP had significantly lower diaphragm contractility and excursion compared to those without LBP.
  • Additionally, stronger diaphragm function (measured by maximal inspiratory pressure) was positively correlated with better performance in snatch and clean and jerk lifts, suggesting that diaphragm training could help in both performance enhancement and LBP management.
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  • This study evaluates when exercise is most effective in treating osteoarthritis (OA) symptoms and how different types of exercise impact these symptoms.
  • It uses data from various databases to analyze randomized controlled trials that focus on the effects of exercise on knee, hip, or hand OA.
  • Results show that exercise effectiveness peaks between 1.6 to 7.2 weeks after starting, with local exercise techniques proving to be the most beneficial in reducing pain and improving function.
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Objectives: To compare the efficacy of the various wavelengths of low-level light therapy (LLLT) in alleviating knee pain, dysfunction, and stiffness in patients with knee osteoarthritis (KOA), and to compare the effectiveness of LLLT versus sham treatment in reducing knee pain, dysfunction, and stiffness.

Methods: PubMed, Web of Science, EMBASE, and Cochrane Library were searched from inception to 12 December 2023. Randomized controlled trials that assessed the effects of different wavelengths of LLLT on alleviating pain of patients with KOA were included.

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  • This study assessed the reliability of measuring stiffness in the psoas major and quadratus lumborum muscles using ultrasound shear wave elastography (SWE) and looked at how gender and physical activity affect muscle stiffness.
  • A total of 52 healthy participants aged 18-32 took part, with repeated measurements showing good reliability (ICC = 0.79-0.92) for stiffness values, along with calculated margins for error.
  • The results indicated that both gender and physical activity level significantly impact muscle stiffness, with females and inactive individuals showing higher stiffness in both muscle groups, highlighting the need for more extensive studies.
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  • The study aims to assess the reliability and validity of ultrasonography techniques for measuring diaphragm and respiratory muscle properties in healthy individuals and those with specific conditions.
  • A comprehensive literature search was conducted through databases like PubMed and Cochrane Library, evaluating various study designs focused on ultrasonography's effectiveness in measuring muscle characteristics.
  • Results from 24 studies involving 787 participants indicated moderate to high-quality evidence for certain measurements, particularly specific ultrasonography methods in individuals with lower back pain and other conditions, though many other measurements showed low reliability evidence.
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Background: The International Classification of Functioning, Disability, and Health (ICF) model has been applied in post-stroke rehabilitation, yet limited studies explored its clinical application on enhancing patients' Activity and Participation (ICF-A&P) level.

Purpose: This study gathered evidence of the effects of an ICF-based post-stroke rehabilitation program (ICF-PSRP) in enhancing community reintegration in terms of ICF-A&P of post-stroke patients.

Methods: Fifty-two post-stroke patients completed an 8 to 12 weeks multidisciplinary ICF-PSRP after setting personal treatment goals in an outpatient community rehabilitation center.

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Knee and hip osteoarthritis are common disabling conditions globally. Although numerous international clinical practice guidelines exist to guide physiotherapy management, not all recommendations issued from these guidelines can be translated to other contexts without considering the cultural acceptability and clinical implementability of targeted countries. Because the ADAPTE framework provides a robust methodology to adapt guidelines to the local context, this study used its methodology to adapt high-quality guideline recommendations to promote optimal physiotherapy care for knee and hip osteoarthritis in Hong Kong.

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Background: Maintaining normal patellar alignment is important for knee health. Altered activation of individual quadriceps muscles have been found related to patellar alignment. However, the relationships between strength and passive stiffness of the quadriceps and patellar alignment remains unexplored.

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  • Research on low back pain (LBP) has been increasing, with a focus on two groups: older adults (LBP-O) and working-age adults (LBP-W), but comparative trends between these populations have not been thoroughly examined.
  • A total of 4217 LBP-O articles and 50,559 LBP-W articles published from 1993 to 2023 were analyzed, revealing an increase in publication rates for both groups, with the U.S. leading in contributions, primarily through the journal "Spine."
  • Key topics in LBP-O included cognitive behavioral therapy and physical activity, while LBP-W emphasized surgery and intervertebral disc degeneration, reflecting a need for a more biopsychosocial approach
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Background: Lower limb malalignment is associated with gait kinematics, but there is limited information on the relationship between gait kinematics and tibial torsion in individuals with knee osteoarthritis (OA). This study aimed to investigate possible associations between tibial torsion and early stance kinematics during gait in people with mild and moderate medial knee OA.

Methods: Forty-seven participants (age: 62.

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Background: Body functions and structures, activities, and participation are the core components in the International Classification of Functioning, Disability, and Health (ICF) to identify post-stroke patients' health conditions. The specification of health conditions enhances the outcomes of post-stroke rehabilitation.

Purpose: This study aimed to explore the extent and the processes in an ICF-based post-stroke rehabilitation program (ICF-PSRP) that could enhance patients' community reintegration level.

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Background: Knee pain is one of the main problems associated with knee osteoarthritis. The peak external knee adduction moment (KAM) in gait is commonly used to estimate medial knee loading, and elevated KAM has been related to a higher risk of developing knee pain in older adults. Although knee flexion moment (KFM) also contributes to medial knee loading, its role in the development of knee pain remains unclear.

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Objective: While platelet rich plasma (PRP) has been extensively studied in treating osteoarthritis (OA), there has been an ongoing debate regarding the efficacy of PRP and the optimal subpopulation for PRP treatment remains unknown. The authors hereby aim to establish a pharmacodynamic model-based meta-analysis to quantitatively evaluate PRP efficacy, comparing with hyaluronic acid (HA) and identify relevant factors that significantly affect the efficacy of PRP treatment for OA.

Methods: The authors searched for PubMed and the Cochrane Library Central Register of Controlled Trials of PRP randomized controlled trials (RCTs) for the treatment of symptomatic or radiographic OA from the inception dates to 15 July 2022.

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Background: Quadriceps weakness is a known risk factor for the onset of knee osteoarthritis (OA). In addition to muscle weakness, increased passive stiffness of the quadriceps may affect knee biomechanics and hence contribute to the pathogenesis of knee OA. However, the association between quadriceps stiffness and the risk of knee OA development has not been prospectively investigated.

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Background: This study aimed to investigate the structural, morphological and passive mechanical properties of the medial gastrocnemius muscle among ambulating chronic stroke survivors using a computational model previously established in healthy individuals without stroke.

Methods: Individuals with chronic stroke (n = 14, age = 63.4 ± 6.

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Article Synopsis
  • Aging in female adults results in increased passive stiffness in specific quadriceps muscles, particularly at higher degrees of knee flexion.
  • The study measured muscle stiffness and knee extension force in young and senior females, finding significant stiffness increases in the rectus femoris and vastus lateralis.
  • A negative correlation was observed between stiffness of the rectus femoris and knee extensor force at 60° flexion, indicating that greater muscle stiffness may impact force generation capabilities in older adults.
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Background: High biomechanical loading is believed to be a risk factor to pain in people with knee osteoarthritis (OA), but controversial findings have been reported on the relationship between external knee adduction moment (KAM) and pain. A more comprehensive analysis considering other factor such as external knee flexion moment (KFM) could help better reveal this relationship. This study explored the relationship between external knee adduction moment and pain intensity in participants with knee osteoarthritis (OA) using an integrated path analysis model.

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Torsional malalignment was detected in subjects with medial knee osteoarthritis (KOA) but few studies have reported the effect of torsional deformity on knee joint loads during walking. Therefore, this study examined the relationships between lower limb torsional alignments and knee joint loads during gait in people with symptomatic medial KOA using cross-sectional study design. Lower limb alignments including tibial torsion, tibiofemoral rotation and varus/valgus alignments in standing were measured by EOS low-dose bi-planar x-ray system in 47 subjects with mild or moderate KOA.

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The aim of the study was to examine the immediate effect of 1 session of extracorporeal shockwave therapy (ESWT) on patellar tendon stiffness and to explore the relationship between the change in tendon stiffness and the pain intensity. Thirty-four male athletes aged 22.2 ± 3.

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Background: The absence of any agreed-upon tendon health-related domains hampers advances in clinical tendinopathy research. This void means that researchers report a very wide range of outcome measures inconsistently. As a result, substantial synthesis/meta-analysis of tendon research findings is almost futile despite researchers publishing busily.

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We aimed to establish consensus for reporting recommendations relating to participant characteristics in tendon research. A scoping literature review of tendinopathy studies (Achilles, patellar, hamstring, gluteal and elbow) was followed by an online survey and face-to-face consensus meeting with expert healthcare professionals (HCPs) at the International Scientific Tendon Symposium, Groningen 2018. We reviewed 263 papers to form statements for consensus and invited 30 HCPs from different disciplines and geographical locations; 28 completed the survey and 15 attended the meeting.

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This study aimed to determine whether pre-exercise muscle stiffness is related to the amount of muscle damage induced by an eccentric exercise and to determine whether the post-exercise increase in stiffness is homogenously distributed between the synergist muscles. Fifty healthy participants were randomly assigned to an eccentric exercise group or a control group. The shear modulus (an index of stiffness) of rectus femoris (RF), vastus lateralis (VL) and vastus medialis oblique (VMO) was measured before, immediately after and at 48 h after eccentric exercise.

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