Adrin struggled for position but San'doro straddled the young man, keeping control of Adrin's hips.
Adrin and San'doro were part of the annual strongman competition. 
mnli hypothesis: Adrin and San'doro were part of the annual strongman competition.  premise: Adrin struggled for position but San'doro straddled the young man, keeping control of Adrin's hips.