Keiser A400 Lower Back

Keiser A400 Lower Back

The A400 Lower Back is built to strengthen and protect the lower back. Unlike weight-stack machines, its low-inertia pneumatic resistance reduces joint stress and removes shock loading, and with it the risk of injury. That makes it suitable for every fitness level, from older adults to elite athletes.

With the built-in A400 technology the machine tracks performance in real time and syncs with the Keiser Metrics App, so training can be guided by measured data.

Key benefits

• Cost-effective way to provide strength training options
• Virtually zero shock to muscles, connective tissues, and joints
• Smooth Keiser Dynamic Variable Resistance
• Fully adjustable to accommodate a wide range of users
• Bilateral movement for body symmetry training
• Large digital display with resistance and counted repetitions
• Durable construction engineered for years of use
• Thick base for added stability

Keiser Dynamic Variable Resistance

Keiser's Dynamic Variable Resistance is designed to provide a smooth, consistent force curve at any training speed. Each machine has its own resistance curve, tuned for the muscles used in that particular exercise. For the user it means training at maximum efficiency at whatever speed they work.