Jeff Martone is regarded by many as one of the premiere kettlebell experts in the world. Zach has been learning from and working with Jeff for years running Kettlebell Rx, as well as two separate gym facilities.

Since 2001 Marcus Martinez has been helping people reach their goals through kettlebells. He has extensive experience in teaching, building programs, developing training modules and running fitness businesses. Additionally, Marcus is a pioneer in kettlebell flow, certifications and holds a number of training certifications.