REP® x PÉPIN™ FAST Series™ Adjustable Dumbbell Add-On Weight

She flips. She lifts. She gives back. She inspires. Demi Bagby’s fitness journey has taken her from injury into the spotlight, combining calisthenics, explosive functional strength, and fearless acrobatics with precision and power. With more than 18 million followers on social media, she has turned her passion for movement into a global platform, motivating millions to pursue fitness, resilience, and positivity. While the world is her playground — from tumbling through towns to racing on speedways — her REP Fitness home gym is where she builds her foundation.

Ian Happ is a dynamic professional baseball outfielder known for his power at the plate and athleticism in the field. A switch-hitter with sharp defensive instincts, he combines skill and intensity to make an impact on every play, earning recognition four years in a row as one of the league’s top defenders. He leverages his REP Fitness home gym to turn off-field workouts into on-field results.

Cooper DeJean, workout beast and rookie standout, has quickly made a name for himself as one of the league's most versatile and explosive defensive backs. Known for his lightning-fast 4.43-second 40-yard dash, he combines elite speed with impressive upper- and lower-body strength, making him a force in both coverage and open-field play. From his record-setting college career at Iowa to his game-changing pick-six that helped his team to victory in pro football's greatest arena, DeJean’s athleticism reflects the intensity that fuels every aspect of his training.

If you’ve heard of the Greek Freak, chances are you’re familiar with George Karlaftis, workout machine and professional football defensive end standing at 6’4”. Known throughout the league for his powerful build and nonstop motor, Karlaftis overwhelms offensive tackles and disrupts backfields with a rare blend of strength, speed, technique, and relentless effort. From a dominant college career to becoming a first-round pick in the pro league, he has defined his rise through toughness, consistency, and an unmatched work ethic. And if you’re looking to raise your own training standard — whether it’s chasing George Karlaftis’ bench press numbers for elite pressing power or building explosiveness with power cleans — we’ve got the REP equipment to help you dial in your home gym just like his.