The description and implementation fidelity of exercise intervention in physical therapy clinical trials interventions need to be better reported.

Researchers must include more information about the interventions, including infrastructure, dose, and adherence.

Implementation fidelity can be improved by providing detailed information about provider skills, how treatment is delivered, methods to ensure patient's understanding and ability to perform the exercise.

MSK pain in children and adolescents is highly prevalent, yet instruments are scarce to measure MSK pain outcomes in children.

The Pediatric MSK Pain Impact summary score is a short and easy instrument to assess MSK pain impact in school-aged children (aged 9 to 12) with MSK pain.

The result of internal consistency was limited, and the construct validity showed borderline estimates of adequacy. However, the discriminative validity results showed that the instrument differentiates between children with frequent and infrequent MSK pain.

This is a factor analysis of the Brazilian-Portuguese version of the WAI questionnaire.

The various WAI versions, completed online, have adequate measurement properties.

The general construct validity of work ability can be evaluated using shorter versions of the WAI.

The WAI is a good questionnaire to evaluate the work ability of Brazilian workers.