How much do we know about the effectiveness of warm-up intervention on work related musculoskeletal disorders, physical and psychosocial functions: protocol for a systematic review
Authors: Larinier Nicolas , Balaguier Romain , Vuillerme Nicolas 
Published: April 2020

Background
Work related musculoskeletal disorders (WMSDs) are a growing worldwide burden and effective interventions to prevent them are needed. Physical activity at the workplace is now recognized as a relevant component of WMSDs prevention. To ensure feasibility and sustainability of workplace physical activity programs, there is a clear need to implement interventions that do not take a large amount of time and that are easy to integrate in daily workplace routines. Along these lines, warm-up interventions are now offered in a large number of companies to manage WMSDs. Although benefits of warm-up have been previously documented in sports context, to the best of our knowledge, the effectiveness of such intervention in workplaces still remains to be established. Within this context, the aim of the present review is to identify from published literature the available evidence regarding the effects of warm-up on WMSDs and physical and psychosocial functions.

Methods
We will search the following electronic databases (from inception onwards): MEDLINE, EMBASE, and Cochrane Library (Cochrane Database of Systematic Reviews and CENTRAL). Randomized and non-randomized controlled studies will be included in this review. Participants of the included studies should be adults employees without specific comorbidities. Interventions should include a warm-up physical intervention in real-workplaces. The primary outcomes will be pain, discomfort or fatigue. The secondary outcomes will be job control or motivation at work. This review will follow the PRISMA guidelines and two team members will independently screen all citations, full-text articles, and abstract data. Two team members will independently screen all citations, full-text articles, and abstract data. Potential conflicts will be resolved through discussion. The study risk of bias and strength of the body of evidence will be appraised using appropriate tools. A systematic narrative synthesis will be provided with information presented in the text and tables to summarize and explain the characteristics and findings of the included studies. The narrative synthesis will explore the relationship and findings both within and between the included studies.
This review will include adult employees (18 years of age or older) and will exclude adults with speciﬁc comorbidities or diseases (such as diabetes, arthritis, cancer, stroke) and/or special populations (pregnant, severe or rare physical disability, or cognitive disability).

Discussion
This review will summarize the evidence on the effects of effects of warm-up intervention on WMSDs, physical or psychosocial functions. This information could help professionals and researchers in decision-making related to the use of warm-up intervention to prevent WMSDs and their adverse consequences. This review will further identify gaps in knowledge in this field that could be addressed in forthcoming studies.

Registration
This protocol has been registered in PROSPERO (CRD42019137211)