Publisher's copyright statement: NOTICE: this is the author's version of a work that was accepted for publication in Social Science Medicine. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reected in this document. Changes may have been made to this work since it was submitted for publication. A denitive version was subsequently published in Social Science Medicine, 88, 2013Medicine, 88, , 10.1016Medicine, 88, /j.socscimed.2013.010.
Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. focusing particularly on biomechanics, maternal health, and the psycho-social impacts of load-carrying; we also draw from our own research. Key knowledge gaps and areas for future research are highlighted.