Immediate effects of hip strap and foot orthoses on self-reported measures and lower limb kinematics during functional tasks in individuals with patellofemoral osteoarthritis: protocol for a randomised crossover clinical trial.

BACKGROUND: Elevated patellofemoral joint stress has been associated with patellofemoral osteoarthritis (PFOA). Changes in lower limb kinematics, such as excessive femoral adduction and internal rotation and excessive rearfoot eversion during the stance phase of functional activities, may increase patellofemoral stress. There is a lack of studies that assess the effects of interventions for controlling femur and subtalar joint movements during functional activities on self-reported measures in individuals with PFOA. Thus, the primary aim of the study is to determine the immediate effects of the hip strap and foot orthoses during level-ground walking and the single-leg squat test on self-reported outcomes. The secondary aim is to investigate whether the hip strap and foot orthoses result in the kinematic changes that these devices are purported to cause. METHODS: Twenty-nine individuals with PFOA aged 50 years or older will take part in the study. The main outcome is pain intensity. The secondary outcomes are other self-reported measures (global rating of change, acceptable state of symptoms, ease of performance, and confidence) and lower limb kinematics (peak femoral adduction and internal rotation, and peak rearfoot eversion). These outcomes will be assessed during functional tasks performed under three conditions: (i) control condition, (ii) hip strap intervention, and (iii) foot orthoses intervention. To investigate whether these interventions result in the lower limb kinematic changes that they are purported to cause, three-dimensional kinematics of the femur and rearfoot will be captured during each task. Linear mixed models with two fixed factors will be used to test associations between the interventions (control, hip strap, and foot orthoses) and conditions (level-ground walking and single-leg squat test) as well as interactions between the interventions and conditions. DISCUSSION: To the best of the authors' knowledge, this is the first study to evaluate the immediate effects of the hip strap and foot orthoses on self-reported measures and lower limb kinematics during functional tasks in individuals with PFOA. The findings of this study will enable future trials to investigate the effects of these interventions in rehabilitation programmes. TRIAL REGISTRATION: ClinicalTrials.gov NCT04332900 . Registered on 3 April 2020.

Biomechanical characteristics and muscle function in individuals with patellofemoral osteoarthritis: A systematic review of cross-sectional studies.

BACKGROUND: Our objective was to investigate kinematic and kinetic characteristics and changes in muscle function in individuals with patellofemoral osteoarthritis compared to healthy individuals. METHODS: Searches were performed of the Medline, Embase, Web of Science, The Cochrane Library, LILACS, and SciELO databases until May of 2022 for observational studies comparing individuals with patellofemoral osteoarthritis to a control group. The PRISMA guidelines and recommendations of the Cochrane Collaboration were followed. The GRADE approach was used to analyze and synthesize the level of evidence. FINDINGS: Fourteen studies were included, involving a total of 594 participants (360 with patellofemoral osteoarthritis and 234 controls). The level of evidence for pelvis, hip adduction and knee abduction angles at 45° of knee flexion during the single-leg squat, and knee flexion angle during the task of walking was very low. Regarding muscle strength, the level of evidence for isometric strength of the hip abductors, extensors and external rotators, and concentric strength of the knee extensors and flexors was very low. It was not possible to synthesize any type of evidence for kinetic, electromyography, or muscle volume variables. INTERPRETATION: The level of evidence was very low for all synthesized evidence for kinematic and muscle strength variables. However, individuals with patellofemoral osteoarthritis have lower isometric strength of the hip abductor muscles. Further studies with adequate adjustment for confounding factors, such as the non-inclusion of individuals with osteoarthritis in the tibiofemoral compartment concomitant to patellofemoral osteoarthritis, are needed to gain a better understanding of the clinical characteristics of patellofemoral osteoarthritis.

Frontal plane biomechanics during single-leg squat and hip strength in patients with isolated patellofemoral osteoarthritis compared to matched controls: A cross-sectional study.

The patellofemoral compartment of the knee is the most frequently affected by osteoarthritis. However, there is a lack of biomechanics studies on patellofemoral osteoarthritis (PFOA). This study's purpose was to compare the frontal plane biomechanics of the trunk and lower limb during the single-leg squat and isometric hip abductor torque in individuals with isolated PFOA and controls. Frontal plane kinematics during the single-leg squat were evaluated using a three-dimensional (3-D) motion analysis system. Isometric hip abductor torque was determined using a handheld dynamometer. Twenty individuals participated in the study (10 with PFOA and 10 controls). No significant differences between groups were found regarding age (mean ± SD, PFOA group = 51.8 ± 6.9 versus control group = 47.8 ± 5.5; mean difference = 4, 95% confidence interval [CI] = -1.9 to 9.9, p = 0.20) or body mass index (PFOA group = 27.6 ± 2.2 versus control group = 25.5 ± 2.5; mean difference = 2.1, 95% confidence interval [CI] = -0.1 to 4.3, p = 0.06). Compared to control, the PFOA group presented greater hip adduction in the descending and ascending phases of the single-leg squat at 45° (mean difference [95% CI] = 6.44° [0.39-12.48°], p = 0.04; mean difference [95% CI] = 5.33° [0.24-10.42°], p = 0.045, respectively) and 60° (mean difference [95% CI] = 8.44° [2.15-14.73°], p = 0.01; mean difference [95% CI] = 7.58° [2.1-13.06°], p = 0.009, respectively) of knee flexion. No significant differences between groups were found for the frontal plane kinematics of the trunk, pelvis or knee (p > 0.05). The PFOA group exhibited lower isometric hip abductor torque (mean difference [95% CI] = -0.34 Nm/kg [-0.67 to -0.01 Nm/kg], p = 0.04). The individuals with PFOA presented greater hip adduction than the control group, which could increase lateral patellofemoral joint stress at 45° and 60° of knee flexion in the descending and ascending phases of the single-leg squat. These individuals also exhibited hip abductor weakness in comparison to healthy controls.

Interventions used by Brazilian physiotherapists in the rehabilitation of patellofemoral pain: A web-based survey.

BACKGROUND: No studies have evaluated whether interventions used by Brazilian physiotherapists for the treatment of patellofemoral pain (PFP) are in line with the best existing scientific evidence. OBJECTIVES: Identify the interventions most commonly used by Brazilian physiotherapists for the rehabilitation of PFP and determine whether characteristics of physiotherapists and knowledge regarding evidence-based practice (EBP) influence the choice of interventions. DESIGN: Cross-sectional web-based survey. METHODS: Brazilian physiotherapists who treat patients with PFP participated in the study. Characteristics of the participants, information regarding EBP and interventions used in the treatment of PFP were collected through an online questionnaire. Descriptive analysis of the data was performed. Logistic regression analysis was employed to investigate associations between the interventions and both the characteristics of the physiotherapists and their knowledge regarding EBP. RESULTS: One hundred and ninety-four physiotherapists completed the questionnaire, 97.4% of whom reported using combined hip and quadriceps strengthening exercises, whereas only 25.3% reported using foot orthoses. A significant number of physiotherapists also reported using interventions that are not recommended (such as patellar mobilization, lumbar, hip and knee mobilization/manipulation and biophysical agents). Physiotherapists with a master's or doctoral degree and those who were aware of clinical practice guidelines were respectively 2.57-fold and 3.81-fold more likely to use recommended interventions. CONCLUSION: Most Brazilian physiotherapists choose interventions that are in line with current scientific evidence. However, a significant number also use interventions that are not recommended for the treatment of PFP.

Impact of urinary incontinence on quality of life in female CrossFit practitioners: A cross-sectional study.

OBJECTIVE: Investigate the impact of urinary incontinence (UI) on quality of life (QoL) in female CrossFit practitioners and to verify the strategies used by them to minimize the occurrence of urine leakage. In addition, to verify whether anthropometric and clinical characteristics increase the UI impact on QoL of female CrossFit practitioners. STUDY DESIGN: This was an online cross-sectional survey. The impact of UI on QoL was investigated by International Consultation on Incontinence Questionnaire - Short Form (ICIQ-SF). Associations between the impact of UI on QoL and the clinical (age, BMI, gestations, mode of delivery, practice of other physical activities) and the others pelvic floor dysfunctions (PFD) related independent variables were tested using logistic regression analysis. RESULTS: A total of 828 female CrossFit practitioners answered the questionnaire and 36% reported UI symptoms. The women who obtained the highest score on the ICIQ-SF have high UI interference in QoL. Previous history of two or more gestations and sexual dysfunctions (dyspareunia or vaginismus) or pelvic organ prolapse increase 2.65 and 1.82 times the risk of female CrossFit practitioners with UI having a high impact of UI on their QoL, respectively (OR = 2.65 95% CI 1.30-5.40, p = 0.01; and OR = 1.82 95% CI 1.04-3.21, p = 0.04, respectively). The most strategies used by them to minimize the occurrence of urine leakage were emptying the bladder before training (77.5%) and use absorbent (17.8%). CONCLUSIONS: Women who had higher scores on the ICIQ-SF reported greater impact on QoL, and the previous history of two or more gestations and sexual dysfunction/pelvic organ prolapse increase the risk of women with UI who practice CrossFit to have a greater impact on QoL. Multigravida and women with sexual dysfunction/pelvic organ prolapse who practice CrossFit could have more attention on the UI symptoms due to the high impact on their QoL.

Adding muscle power exercises to a strength training program for people with patellofemoral pain: protocol of a randomized controlled trial.

BACKGROUND: Strong evidence supports the proximal combined with quadriceps strengthening for patellofemoral pain (PFP) rehabilitation. However, most reported rehabilitation programs do not follow specific exercise prescription recommendations or do not provide adequate details for replication in clinical practice. Furthermore, people with PFP have power deficits in hip and knee muscles and it remains unknown whether the addition of power exercises would result in superior or more consistent outcomes. Therefore, this study is designed to verify whether the benefits of a rehabilitation program addressing proximal and knee muscles comprising power and strength exercises are greater than those of a program consisting of strength exercises only. METHOD: This study will be a randomized controlled trial that will be conducted at university facilities. A minimum of 74 people with PFP between the ages of 18 and 45 years will be included. The experimental group will engage in a 12-week resistance training program focusing on proximal and knee muscles using power and strength exercises. The control group will engage in a 12-week resistance training program focusing on proximal and knee muscles using strength exercises only. Primary outcomes will be pain intensity and physical function; and secondary outcomes will be kinesiophobia, self-reported improvement, quality of life, peak hip and knee torque, and hip and knee rate of force development. The primary outcomes will be evaluated at baseline, and after 6 weeks, 12 weeks, 3 months, 6 months, and 1 year. The secondary outcomes will be evaluated at baseline and immediately after the interventions. Therapists and participants will not be blinded to group allocation. DISCUSSION: This randomized clinical trial will investigate if adding power exercises to a progressive resistance training may lead to more consistent outcomes for PFP rehabilitation. The study will provide additional knowledge to support rehabilitation programs for people with PFP. TRIAL REGISTRATION: ClinicalTrials.gov NCT03985254. Registered on 26 August 2019.

Pelvic floor dysfunctions and associated factors in female CrossFit practitioners: a cross-sectional study.

INTRODUCTION AND HYPOTHESIS: It is known that high-impact exercises can cause an increase in intra-abdominal pressure and provide overload in the pelvic floor structures. We hypothesized that female CrossFit practitioners would report symptoms of pelvic floor dysfunction (PFD) and that there will be factors associated with these dysfunctions. METHODS: The study design is an online cross-sectional survey. Demographic and anthropometric data, the characterization of CrossFit activity, the description of PFD and previous obstetric history were collected through a structured web-based questionnaire. Associations between PFD and the clinical and CrossFit-related independent variables were tested using logistic regression analysis. RESULTS: A total of 828 female CrossFit practitioners answered the questionnaire. The most prevalent symptom was anal incontinence (AI) (52.7%), with flatus incontinence (FI) being the most reported (93.3%). Women who reported constipation are 1.7 times more likely to have FI, and women who practice CrossFit more than five times a week are 3.0 times more likely to have FI. Urinary incontinence(UI) affected 36% of women, and 84.2% of participants reported urinary loss during CrossFit practice. The occurrence of dyspareunia was reported by 48.7% and showed an inverse association with age and body mass index. POP was reported by only 1.4% of the sample. CONCLUSION: There is a high prevalence of PFD in female CrossFit practitioners, with AI being the most reported symptom, especially FI. In addition, constipation and weekly training frequency were significantly associated with FI. UI occurred primarily in CrossFit exercises, and dyspareunia was the most prevalent sexual symptom.