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:…studies found similar results when comparing resisted sprint training with elastic bands (Myer, Ford, Brent, Divine, & Hewett, 2007), weighted-sled (Spinks et al., 2007; West et al., 2012), weighted-vest (Clark et al., 2010; Rey, Padron-Cabo, & Fernandez-Penedo, 2016) with unresisted training on…
Category: