EXPLOSIVE, BALANCED POWER
The A300 Seated Calf was originally designed for world record holders Willie Banks (triple jump) and Mike Powell (long jump). It features unilateral movement to help develop balanced explosive lower&8209;leg power. The machine automatically pre‑loads and adjusts for leg length. Unlike conventional machines that use iron, the A300 Seated Calf’s low‑inertia design gives you a smooth resistance. The result is a workout unlike anything else on the market.
Features you won’t find in conventional machines
Bilateral movement to train muscle symmetry.
Increased resistance range for more intense functional workouts.
Large digital display that shows resistance, sets, repetitions, and peak power.
Thumb buttons let you change resistance without changing position — even during exercise.
Fast, easy, and precise eccentric overloading.
Change resistance in increments as small as one pound.
Industry-leading lifespan and uptime for years of use.
Unique versatility; five ways to train instead of only one.
Fully adjustable to accommodate a wide range of users.
Why choose the A300 Seated Calf?
Lower risk of injury. Pain-free range of motion.
The A300 Seated Calf reduces resistance where you’re most vulnerable to injury. And the low inertia of our resistance system eliminates shock loading; sparing your joints and connective tissues from harmful forces.
Achieve your training goals faster
Our machines increase resistance where you’re stronger and decrease resistance where you’re weaker. This allows your muscles to work at their full potential through every point in the range of motion.
Keiser’s machines focus on efficiency.