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Ground Base® Jammer
Built for raw power and explosive performance, the Hammer Strength Ground Base® Jammer is the real deal—no imitations, no compromises. While racks try (and fail) to mimic its movement, only the Jammer delivers the perfect blend of converging and diverging motion, unlocking true athletic drive.
Designed in the ‘90s and still unmatched today, it’s the gold standard for developing force, power, and on-field dominance. When it comes to training like an athlete, there’s no substitute—there’s only the Jammer.
A PLATE-LOADED FAVORITE
Bring the intensity of a gym workout home with the Plate Loaded Ground Base Jammer. This popular back machine can be found in some of the most iconic strength meccas around the world and has been a Hammer Strength staple for decades.
UNMATCHED SINCE THE '90S
The Ground Base® Jammer isn’t new—it’s legendary. While other companies try to replicate its movement with half-measures, only Hammer Strength delivers the true Jammer experience. Designed in the mid-90s and still dominating weight rooms today, it remains the ultimate training tool for explosive strength.
HOW IT WORKS
Athletes don’t just lift—they drive, push, and explode. The Ground Base® Jammer trains force production in the most athletic way possible, mimicking the powerful pressing movements seen in sport. The Jammer builds the kind of strength that translates to real performance.
HOW IT'S MADE
Hammer Strength plate loaded machines are made with 11-guage steel frames and electrostatic powder coat finish for maximum durability. There are numerous seat adjustments to allow you to find your perfect position and muscle isolation. Molded foam on the cushions provides comfort, support, and durability. All machines have holes in the feet that allow for easy anchoring to the floor.
Does not include weights, bars or attachments.
SPECIFICATIONS
WARRANTY
Extended parts and labor Protection Plans available.
SHIPPING & STORE PICK UP
Free in-store pick up at our Pennsylvania locations. We ship with USPS, UPS or one of our various freight common carriers depending on size and weight. Free or fee based shipping only applies to the 48 continental states
EXTENDED PROTECTION
Keep your fitness goals on track with our Extended Protection Plans that provides comprehensive coverage beyond the standard manufacturer’s warranty. Enjoy worry-free workouts knowing your equipment is covered.
DELIVERY & ASSEMBLY
Local inside delivery, assembly and equipment removal options available. Our professional installation team will ensure your project is completed on-time, assembled and tested for safety, and is trouble free.
ABOUT FITNESS EXCHANGE
Founded in 1997, our company is a proud, locally owned and operated business. Our founder, Tom, had a deep passion for fitness equipment and noticed a gap in the local market. This realization led him to open his first shop in Conshohocken.
Fifteen years later, with his children grown, Tom immersed himself further into the business and expanded to the Lehigh Valley with a second storefront. He also ventured into commercial sales, providing a comprehensive, full-service experience to local gyms, schools, residential complexes, hotels, and more. This expansion established us as the go-to solution for fitness center needs. Over the past 25+ years, we have cherished becoming an integral part of the community in both Philadelphia and the Lehigh Valley.