Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:With regards to PIST, Mendham et al. (2014) reported no change in waist or hip girths following 8 weeks of SSG’s in middle-aged, sedentary men; however, participants did demonstrate improvements in body composition.
Category: