AIR300 Seated Calf

AIR300 Seated Calf

Discontinued

Originally designed for world record holders Willie Banks (triple jump) and Mike Powell (long jump), the AIR300 Seated Calf is engineered to develop explosive power in the lower leg. Its unilateral and bilateral options, along with high-speed capability, allow for greater results during training. The machine pre-loads and adjusts for leg length, positioning the user to effectively activate and isolate the calves. Works Gastrocnemius, Soleus.

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AIR300 Seated Calf Reviews

Based on 1 reviews from Gym Radar users, the Keiser AIR300 Seated Calf have an average rating of 4.67 out of 5. They're currently the #27 most-owned Calf Machine on Gym Radar, with 1 home gyms reporting ownership.

1 Review

4.67 / 5
Performance
5.00 / 5
Build Quality
5.00 / 5
Value
4.00 / 5

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Garage Gym 411
Garage Gym 411's Gym
10 reviews
399 points
(4.67)
4/3/2026
Keiser strength machines are known for their dynamic capabilities and being very joint-friendly - ideal for pro sports (NFL, MLB, NHL, NBA) and physical rehab facilities. The Keiser AIR300 Seated Calf is a solid, quality, adjustable machine. With unilateral & bilateral options, it's unlike most seated calf machines. For example, a typical, plate-loaded, seated calf raise would have you plant both of your feet on fixed pedals or crossmember. You would then have a padded bar (that goes across the top of your legs) and you would proceed to raise that bar upward with each rep. On the Keiser unit, you have an adjustable bar that contains 2 pivoting pads. Once seated, you lock the padded bar across the top of your legs, press down on 2 individual pedals, either together or one-at-a-time. All Keiser strength machines (with 2 or 5-window displays) provide resistance & reps. On this machine, it displays 'overall resistance' - you need to divide the resistance shown on the display by 2 to determine how much resistance is being provided for each leg (i.e. the max is 860lbs (390kg), so that's 430lbs max for each leg.) Weight adjusts in 1lb/1kg increments, so again, divide what is displayed by 2 = 1/2lb increment per leg. It's footprint is minimal; in my 2-car garage, I placed it between my SUV and the wall (on the opposite side of my "main gym") and I can still use it while my vehicle is parked inside. As with most of my machines, I purchased this one used. Admittedly, a seated calf wasn't high on my list at the time. Here's what convinced me: #1) I already had 4 other Keiser machines & compressor #2) It's very rare to see a used Keiser Seated Calf machine for sale anywhere #3) The asking price was comparable to a used, higher end, plate-loaded seated calf raise #4) It was only 3 hours away at a MLB Spring Training Facility. NOTE: The AIR300 Seated Calf (model 2936) later became the A300 Seated Calf (model 2936) and A400 Seated Calf (model 2936.)
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