Volitional processes in changing physical activity: A randomized controlled trial with individuals with knee osteoarthritis.

Objective: A health action process approach (HAPA)-based intervention was designed to support moderate-to-vigorous physical activity (MVPA) in individuals with osteoarthritis of the knee (OAK). In secondary analyses of the randomized controlled trial "preventing the impairment of primary osteoarthritis by high-impact long-term physical exercise regimen-psychological adherence program," we examined long-term effects of the intervention on HAPA determinants and MVPA, and explored the former as mediators of change.

Method: = 241 individuals with OAK (63% women, aged 44-80 years) were randomly assigned to the 12-month intervention condition (IC) or active control condition (CC).

Enhancing physical activity and reducing symptoms of patients with osteoarthritis of the knee: a randomized controlled trial of the PrevOP-Psychological Adherence Program.

Background: This primary analysis evaluated the "PREVenting the impairment of primary Osteoarthritis by high-impact long-term Physical exercise regimen-Psychological Adherence Program" (PrevOP-PAP), designed to support patients with osteoarthritis of the knee (OAK) to engage in regular moderate-to-vigorous physical activity (MVPA) to reduce OAK symptoms (WOMAC scores). Theory-based on the health action process approach (HAPA), the intervention targeted volitional precursors of MVPA change: action and coping planning, maintenance and recovery self-efficacy, action control, and social network formation. We hypothesized that compared to an active control condition, increases in MVPA at the end of the 12-month intervention would translate into lower WOMAC scores at 24 months in the intervention condition.

The Rett Syndrome Gross Motor Scale - Dutch Version (RSGMS-NL) Can Reliably Assess Gross Motor Skills in Dutch Individuals with Rett Syndrome.

Aim: The Rett Syndrome Gross Motor Scale (RSGMS) is an observational measurement, assessing gross motor skills in individuals with Rett syndrome. A Dutch version is lacking. The current study aims to translate and cross-culturally adapt the original RSMGS to Dutch and assess its inter-rater and intra-rater reliability.

Balance Performance across the Lifespan Assessed by the Leonardo Mechanograph: A Cross-Sectional Study.

Reference values of sway parameters have not been published for the Leonardo mechanograph so far. The aim of this cross-sectional study was to determine normative values on postural control measured by the force plate Leonardo Mechanograph and to analyze the influence of age and sex on balance performance. A set of standardized standing positions with eyes opened (Romberg, semi-tandem, tandem, unipedal standing) was carried out.