Pain during prolonged sitting in subjects with patellofemoral pain in Dutch physical therapy clinics: an online questionnaire-based analysis.

Objectives: This study aimed to describe (1) differences between subjects with patellofemoral pain (PFP) with and without pain during prolonged sitting (PDPS), (2) minimum knee flexion angle and time to onset/disappearance of PDPS and (3) differences between those with PDPS at smaller/greater flexion angles and with fast/slow onset and disappearance of PDPS.

Design: Patient-reported online questionnaire.

Setting: Private physical therapy clinics in the Netherlands between May 2021 and March 2023.

Is Visual Reliance Increased in Athletes After ACL Injury? A Scoping Review.

Background: Individuals with anterior cruciate ligament (ACL) injury often exhibit visual cognitive deficits during tasks that require neuromuscular control. In this paper, we present evidence of increased visual reliance after ACL injury during a range of clinically applicable cognitive-motor tasks. This information is essential to strengthen the scientific rationale for therapeutic interventions that target maladaptive neuroplasticity and may translate to improved return-to-sport (RTS) outcomes following ACL injury.

Return to running criteria after anterior cruciate ligament reconstruction: an online survey of 1404 Italian physiotherapists.

Background: The aim of this study is to study the clinical decision-making practice of Italian physiotherapists in return to running (RTR) after anterior cruciate ligament (ACL) reconstruction, and the differences in decision-making in relation to physiotherapist's characteristics.

Methods: An online survey was developed, 1404 physiotherapists were contacted by email, via chartered association, or via social media.

Results: Most respondents (83%) indicated that the RTR decision should be made by a multidisciplinary team with RTR clearance around 3-4 months after surgery (47%).

Impaired hemodynamics of the patella in patients with patellofemoral pain: A case-control study.

Purpose: According to the homeostasis model, patellofemoral pain (PFP) arises as a consequence of disturbed homeostasis of anterior structures of the knee due to vascular insufficiency. Near-infrared spectroscopy (NIRS) allows to measure changes of concentrations (µmol/cm) of (de)-oxygenated hemoglobine (HHb and OHb). The aim was to study differences in patellar hemodynamics between patients and healthy controls.

Large variation in postoperative rehabilitation protocols following operative treatment of osteochondral lesions of the talus: A systematic review and meta-analysis on >200 studies.

Purpose: A treatment-specific rehabilitation protocol and well-defined return-to-play criteria guide clinical decision-making on return to normal function, activity, sports and performance after surgical treatment for osteochondral lesion of the talus (OLT). The optimal rehabilitation protocols in the current literature remain unclear. The purpose of this study was to explore the existing literature on rehabilitation protocols from the early postoperative phase to return to sport onwards after different types of surgical treatment of OLTs.

Near-Infrared Spectroscopy measurements are reliable for studying patellar bone hemodynamics and affected by venous occlusion, but not by skin compression.

Purpose: According to the homeostasis model, patellofemoral pain (PFP) results from disturbed homeostasis due to vascular insufficiency in the anterior knee. Near-Infrared Spectroscopy (NIRS) measures relative changes in concentrations (in µmol/cm) of (de-)oxygenated hemoglobine (HHb and OHb). The aims were to: 1) investigate the characteristics of the NIRS signal derived from the patella during experiments affecting hemodynamics in healthy controls, and 2) determine the test-retest reliability of NIRS in positions clinically relevant for PFP patients.

Patients with patellofemoral pain have lower soft tissue flexibility of the kinetic chain compared to healthy controls: A case-control study.

Introduction: Patellofemoral pain (PFP) is a common musculoskeletal condition. Lower limb range of motion (LLROM) evaluates soft tissue flexibility over multiple joints as part of the kinetic chain. The aims were to study: 1) the reliability of a new LLROM test; 2) differences in LLROM between PFP patients and controls; and 3) the relationship between LLROM and pain-free knee function.

What biomechanical parameters are related to drag-flick performance in field hockey? A systematic review.

The drag-flick is a highly relevant skill to enlarge scoring opportunities during penalty corners in field hockey. Understanding drag-flick biomechanics will likely assist in optimising training and performance of drag-flickers. The purpose of this study was to identify the biomechanical parameters related to drag-flicking performance.

Hip and groin pain in male field hockey players: Prevalence, incidence and associations with patient reported outcome scores and hip muscle strength.

Objectives: Investigate point prevalence (second half season 2018-2019) and incidence (season 2017-2018 and first half season 2018-2019) of non-time-loss and time-loss hip/groin pain in male field hockey players. Secondary aims were to study associations between: current/previous hip/groin pain and hip muscle strength, patient reported outcome measures (PROM) and hip muscle strength, and previous hip/groin pain and PROMs. Additionally we studied normal values for the PROMs (Hip and Groin Outcome Score (HAGOS)).

Simply structured polarization-independent high efficiency multilayer dielectric gratings.

A polarization-independent multilayer dielectric diffraction grating with a low aspect ratio and high diffraction efficiency was designed and fabricated. The diffraction grating designed with a grating density of 1200 lines/mm had an aspect ratio of 0.59, mean polarization-independent diffraction efficiency in the Littrow angle of ±2.

Contribution of sex, sports and activity types and curriculum load distribution to intracurricular injury risk in physical education teacher education: a cohort study.

Objectives: To investigate the influence of sports/activity types and their distribution over the curriculum years on intracurricular injury risk differences between curriculum years and sexes in Physical Education Teacher Education (PETE) studies.

Methods: In a cohort study over 14 years (2000-2014), injuries reported at the medical facility of a Dutch vocational institute by PETE students who completed their full curriculum were registered. Intracurricular injury rates (IR) per 1000 hours and 95% CIs were calculated per sport, sex and curriculum year and compared with injury rate ratios (RR) and 95% CI.

Return to sports after ACL injury 5 years from now: 10 things we must do.

Background: The outcome after ACL reconstruction (ACLR) is in general disappointing with unacceptable number of athletes that do not return to pre-injury level of sports, high re-injury rates, early development of osteoarthritis and shorter careers. Athletes after ACLR have high expectation to return to sports which is in contrast with the current outcomes. The aim of this manuscript is to present an overview of factors that are needed to be incorporated and to personalize the rehabilitation process for an athlete who has undergone an ACLR.

Sports injury prevention programmes from the sports physical therapist's perspective: An international expert Delphi approach.

Objective: To provide consensus on how to plan, organize and implement exercise-based injury prevention program (IPP) in sports.

Design: Delphi.

Setting: LimeSurvey platform.

Short-term effectiveness of an intervention targeting lower limb range of motion on pain and disability in patellofemoral pain patients: A randomized, non-concurrent multiple-baseline study.

Introduction: Patellofemoral pain (PFP) is a common and often long-standing musculoskeletal condition. Evidence of the effectiveness of interventions addressing soft tissue flexibility is conflicting and of inconsistent scientific quality. However, reduced soft tissue flexibility can negatively affect patellofemoral joint kinematics.

Do hip and groin muscle strength and symptoms change throughout a football season in professional male football players? A prospective cohort study with repeated measures.

Objectives: Groin injuries are common in professional male football and result in significant complaints, time-loss and cost. We aimed to study: 1. Normal values of hip muscle strength and self-reported hip and groin function (Hip And Groin Outcome Score (HAGOS)).

Classifying radiographic changes of the pubic symphysis in male athletes: Development and reproducibility of a new scoring protocol.

Purpose: To develop a specified radiographic scoring system for the pubic symphysis and adjacent bones, and to examine the intra- and inter-rater reproducibility of this system.

Method: Development of the scoring protocol was performed in three stages using AP pelvis radiographs of 102 male adult athletes. The final protocol included 5 overall scoring items, which included further specification of locations: 1) bone lucency (erosion-like configuration and cysts), 2) proliferation, 3) fragmentation, 4) sclerosis, and 5) joint space width.

Normal values for hip muscle strength and range of motion in elite, sub-elite and amateur male field hockey players.

Objectives: To determine normal values for hip strength and range of motion (ROM) of elite, sub-elite and amateur male field hockey players and to examine the effect of age, leg dominance, playing position, playing level and non-time-loss groin pain on hip strength and ROM.

Design: Cross-sectional study.

Setting: Physical testing took place at field hockey clubs.

Validity of a New 3-D Motion Analysis Tool for the Assessment of Knee, Hip and Spine Joint Angles during the Single Leg Squat.

Aim: Study concurrent validity of a new sensor-based 3D motion capture (MoCap) tool to register knee, hip and spine joint angles during the single leg squat.

Design: Cross-sectional.

Setting: University laboratory.

Judokas with low back pain have lower flexibility of the hip-spine complex: A case-control study.

Objective: Study whether male adult judokas with and without low back pain (LBP) have different hip-spine flexibility.

Design: Cross-sectional.

Setting: Judo training centres.

Including performance level lowers prevalence of non-timeloss groin injury. A cross-sectional study in 383 female amateur football players.

Objective: To study the preseason prevalence of groin injury with normal and reduced performance.

Design: Cross-sectional cohort.

Settings: Online survey.

The effect of compression shorts on pain and performance in male football players with groin pain - A double blinded randomized controlled trial.

Objective: To investigate the effects of compression shorts on pain and performance in football players with groin pain.

Study Design: Double blinded randomized controlled trial.

Setting: Soccer pitch.

The decline step-down test measuring the maximum pain-free flexion angle: A reliable and valid performance test in patients with patellofemoral pain.

Objectives: Patients with patellofemoral pain (PFP) experience pain while descending stairs. To date no reliable and valid performance-test exists to assess the maximum pain-free knee flexion angle (MPFFA) as outcome measure during a step-down task. Therefore, the intra- and inter-observer reliability and construct validity of the decline step-down test (DSDT) measuring the MPFFA in patients with PFP were evaluated.