A competitor warms up during the Ultimate Strongman Masters World Championship at Crumlin Road Prison, in Belfast.

Photo: Brian Lawless/PA

Massages are also important to loosen the muscles before the competition.

Photo: Clodagh Kilcoyne/Reuters

Veteran strongman Chad Coy in competition.

Photo: Clodagh Kilcoyne/Reuters

In this round, the competitors must lift a large spherical rock and place it on a barrel.

Photo: Clodagh Kilcoyne/Reuters

Not to be outdone, England’s Paul Carter shakes the tree.

Photo: Clodagh Kilcoyne/Reuters

Scotland’s John Pollock celebrates after triumphing in his struggle with the Stone.

Photo: Brian Lawless/PA