Back in 2014, we put Dustin Johnson's girlfriend, Paulina Gretzky (left), through the paces of a golf workout including use of one of the most beneficial pieces of equipment in any gym—a physio ball.
NEW YORK (Reuters) - Medicine balls, the fitness tool as ancient as Hippocrates, have bounced, slammed, tossed and twisted their way into today's trendiest workouts, fitness experts say. The durable, ...