Keiser A400 Seated Butterfly

Keiser A400 Seated Butterfly

The chest is one of the largest muscle groups, so balanced development calls for training it from several angles. The A400 Seated Butterfly activates the chest directly and complements Keiser's chest press machines well.

Smooth pneumatic resistance keeps the movement under control through the full range of motion, reducing joint stress and increasing muscle engagement. The A400 technology tracks performance in real time and syncs with the Keiser Metrics App.

Key benefits

• Unique axis of rotation allows greater range of motion in natural planes of movement
• Smooth Keiser Dynamic Variable Resistance
• Fully adjustable to accommodate a wide range of users
• Durable construction engineered for years of use
• 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.