Emma K Ho

1. Introduction Rotator cuff injuries account for 80% of primary care consultations for shoulder pain (1), and their incidence increases with age (2). These injuries, among other problems such as weakness and loss of function, can cause significant levels of pain that are crucial when deciding treatment strategies (3).

Abstract Low back pain (LBP) is one of the world's most prevalent health issues. Patients with LBP experience various intensities and durations of symptoms, which can lead to distinctive course patterns commonly described as symptom trajectories. This study aimed to investigate the association between different amounts of physical activity and sedentary behavior and the trajectory of LBP, in people with a lifetime history of LBP.

Dear Editor, Moore and colleagues recently published a rapid response to our systematic review,[1] raising concerns regarding our inclusion of trials deemed as untrustworthy, our sample sizes, and our discussion of comparative literature. We reinforce in the points below that the main conclusions of our published review are not erroneous, our analyses were adequately powered, and our selection of comparative literature was appropriate. 1.