This summary provides an overview of the key details from the document: Chriss Silverstein competes internationally in kettlebell competitions and owns a kettlebell training business. She trains regularly with kettlebells and encourages her daughter Erica to participate in the sport as well. Patric Westerlund and Tobias Holm traveled from Sweden to compete in a kettlebell event, having been introduced to kettlebell training through their rehabilitation and fitness routines. Kettlebell training has grown significantly in popularity in gyms in recent years.