To investigate the efficacy of two volumes of acute isometric wall squat exercise on pain sensitivity (primary outcome: pressure pain threshold (PPT)) and intensity (secondary outcome) in adults with knee osteoarthritis.

A parallel-group randomised controlled trial.

Outpatient physiotherapy clinics at hospitals in Saudi Arabia.

Participants (n = 90; mean (SD) age 49.0 (13.0) years) with chronic knee osteoarthritis, diagnosed by a specialist orthopaedic physician using radiographic evidence and clinical judgement, were recruited via two tertiary hospitals in Saudi Arabia.

Participants were stratified by sex and randomly allocated to one of three groups: isometric single-repetition wall-squat (ISO-SR; one repetition of a 3-min wall squat or to volitional fatigue at a 100° knee joint angle), isometric multiple-repetition wall-squat (ISO-MR; three repetitions of the same intervention) and control (quiet sitting for 7 min).

PPT was measured at the calf (primary site of interest), lumbar spine and forearm using a pressure algometer. Pain intensity was assessed using a visual analogue scale. Primary analyses compared changes between intervention and control groups. All participants were included in the ITT analysis.

The ISO-MR group had higher mean PPT ratings immediately postintervention in the calf (mean difference=9.4 (95% CI 5.6 to 13.2), p

Both the ISO-SR and ISO-MR exercises to volitional fatigue reduced pain sensitivity in patients with knee osteoarthritis. Neither exercise volume changed clinical pain intensity.

ClinicalTrials.gov registry (ID: NCT05605444).

To describe diagnostic and management characteristics of acute rheumatic fever (ARF) among participants in the ‘Searching for a Technology-Driven Acute Rheumatic Fever Test’ study, in order to answer clinical questions and determine epidemiological and practice differences in different settings.

Multisite, prospective cohort study.

One hospital in northern Australia and two hospitals in New Zealand, 2018–2021.

143 episodes of definite, probable or possible ARF among 141 participants (median age 10 years, range 5–23; 98% Indigenous).

Participant characteristics, clinical, biochemical and echocardiographic data were explored using descriptive data. Associations with length of stay were determined using multivariable regression analysis.

ARF presentations were heterogeneous with the most common ARF ‘phenotype’ in 19% of cases being carditis with joint manifestations (polyarthritis, monarthritis or polyarthralgia), fever and PR prolongation. The total proportion of children with carditis was 61%. Australian compared with New Zealand participants more commonly had ARF recurrence (22% vs 0%), underlying RHD (48% vs 0%), possible/probable ARF (23% vs 9%) and were underweight (64% vs 16%). Erythrocyte sedimentation rate (ESR) provided an incremental diagnostic yield of 21% compared with C reactive protein. No instances of RHD were diagnosed among participants in New Zealand. Positive throat Group A Streptococcus culture was more common in New Zealand than in Australian participants (69% vs 3%). Children often required prolonged hospitalisation, with median hospital length-of-stay being 7 days (range 2–66). Significant predictors for length of stay in a multivariable regression model were valve disease (adjusted OR (aOR) 1.56, 95% CI 1.23 to 1.98, p

This study provides new knowledge on ARF characteristics and management and highlights international variation in diagnostic and management practice. Differing approaches need to be aligned. Meanwhile, locally specific information can help guide patient expectations after ARF diagnosis.