Keiser A300 Leg Extension Pro

Keiser A300 Leg Extension Pro

This is the machine on which the advantage of Keiser Dynamic Variable Resistance over iron shows best. The quadriceps is one of the most powerful muscle groups in the body and produces very high forces at very high speeds.

The knee is most vulnerable at large angles of flexion, so resistance is lower at the start of the movement, highest in the middle and eases off again towards full extension. Together with the ability to train each leg separately and at speed, that means the greatest effect with the least strain on joints and connective tissue.

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.