Keiser A400 Runner

Keiser A400 Runner

The A400 Runner replicates the acceleration phase of a sprint and is therefore a tool for developing speed, power and endurance. Professional athletes worldwide train on it.

Keiser's low-inertia pneumatic system allows smooth, controlled movement and reduces joint stress. The A400 technology tracks performance in real time and syncs with the Keiser Metrics App.

Key benefits

• Unilateral movement - each limb can be trained symmetrically
• Increased resistance range for more intense functional workouts
• 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

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.