Our Team

Jeff Martone is the Founder and CEO of Kettlebell Rx ®. He is considered a pioneer and one of the “Founding Fathers” of the modern Kettlebell movement in the United States.


In 2001, Jeff was the first person to implement a Kettlebell program into a federal law enforcement academy, and has been teaching ever since. Jeff has taught seminars to multiple federal, state, and local law enforcement agencies, special operations personnel, and professional athletes all over the world.


Jeff served for more than 20 years as a full-time defensive tactics, firearms, and special response team instructor, providing low profile operator development training for the Nuclear National Security Administration (NNSA).

Jeff Martone

Zach Filer is the Vice President of Kettlebell Rx ®. He has been teaching kettlebell seminars all over the world since 2010, and is in charge of programming the Kettlebell Rx ® Workout of the Day. You can find Zach giving advice for these workouts regularly on our media channels.

Zach’s personal use of the Rx style of lifting has produced multiple Kettlebell sport world record athletes, Master and International Master of Sport lifters, as well as high level athletes in a large range of strength and endurance sports. These results are not limited to the sporting arena, and Zach’s work is regularly used in the training of Military, Fire personal and LEO.


Zach has been running an affiliate since 2009, and owns CrossFit Hinge in the South Park area of Seattle. He also runs a non-profit teen program which gives youth the opportunity to learn to lift and to train for free at his gym.


Maureen Martone is a co-owner of Kettlebell Rx ®, and has over 20 years of experience in the fitness arena. She was one of the first women in the United States to train with kettlebells, and has experience teaching in many forms of kettlebell training, and fitness in general.


Maureen has presented at national conferences, seminars, and workshops, is the author of the Busy Woman’s Workout series (“Kettlebells: Cardio & Fat Loss for Women,” “Kettlebell Interval Training: Maximum results; Minimal Time” and “Kettlebells: 6-Minute Routines for Women.”), and is a certified instructor of Controlled Fatigue Training and Warrior Diet Nutrition.

Maureen Martone

Adrianna “AJ” Kara has been coaching since 2012, and has completed coaching internships with three different gyms, in two different countries. She is currently a head coach and co-owner at CrossFit Hinge in Seattle. AJ has also taken her affiliate and love of Kettlebells one step further, and created a non-profit teen program in Seattle so local youth can learn to lift and train for free at her gym.


AJ began her journey in Kettlebell Sport in 2016, and holds a Master of Sport in the 20kg Long Cycle, a Master of Sport in the 16kg Half Marathon (30 min) Long Cycle, and 844 reps in the 16kg Marathon (60 min) Long Cycle, which stood as an unofficial World record as it was performed at a charity event.

%d bloggers like this: