Physical activity is important for maintaining health in virtually all therapeutic areas and is often recognised as a sixth functional vital sign. With more than one in five US adults already using ...

Background Interventions to promote physical activity (PA) among older adults can positively impact PA behaviour and other health outcomes. Measurement of PA must be valid and reliable; however, the ...

Despite extensive use over 40 years, physical activity questionnaires still show limited reliability and validity. Measurements have value in indicating conditions where an increase in physical ...

In the past several decades more than 30 new treatments for lupus have failed in clinical trials, even though all had seemed promising in the test tube. These repeated failures take a toll on the ...

Lupus disease complexity and variability makes accurate measurement of disease activity very challenging. Measurement of disease activity in lupus is central to clinical research and clinical trials ...