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Sky-King Calf Isolator
Sky-King Ankle/Shin Isolator

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Sky-King Calf Isolator : Jump Higher, Increase Vertical Jump Run Faster and Dunk More!

Price range: $144.94 through $154.95
Select options This product has multiple variants. The options may be chosen on the product page

Sky-King Ankle/Shin Isolator : Ankle Rehab for Weak Ankles, Drop Foot, Exercise Shin Splints Strengthener.

$132.95
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Total Package

Price range: $265.00 through $275.00
Select options This product has multiple variants. The options may be chosen on the product page

Jump Higher, Run Faster, Instantly!

Increase Balance by 50%! Build Super Stretch Every Athlete Needs. Strengthen Your Feet and Ankles Virtually Overnight. Take your athletic performance to the next level with our Sky-King Specialized Workouts, designed for explosive jumps, quick feet, and total lower-leg strength.

Fitness enthusiast leaping on pavement

How the Sky-King Calf Isolator Works

The Calf Isolator delivers results that other devices and platform shoes simply cannot match and comes with a 30-day money-back guarantee. Not a calf raise or anything like it. It is a controlled, unlimited super stretch in a position that isolates the feet, calves, hamstrings, and lower back. Then the workout is PROGRESSIVE resistance in the range of motion, not dead weight like a calf raise. Here’s how:

1. Positioning: Sit on the floor with your back against a wall. Knees are locked, calves in contact with the floor.

2. Adjustment: Pull the nylon straps to set tension according to your size.

3. Activation: Press with the balls of your feet—our specially engineered tension springs react with up to 500 lbs of resistance per leg.

4. Targeted Training:

  • Turn feet inward + shorten cross member → outer calves & ankles.
  • Turn feet outward + lengthen cross member → inner calves.
  • Straightforward → total calf, foot arch, and Achilles strengthening.

Benefits:

  • Builds an explosive vertical jump

  • Increases foot quickness

  • Enhances overall athletic performance

  • No dangerous Impact training (like the platform shoes) that can cause injuries to the Achilles tendon, calf muscles, and feet.

How the Ankle/Shin Isolator Works

The Ankle/Shin Isolator unlocks a hidden power source in your lower legs. The system comes with a 30-day money-back guarantee (less shipping and handling).

1. Setup: Sit on a bench with tightly laced athletic shoes. Insert your foot onto the angled platform. The ball of the foot is in contact with the grip surface. Secure tightly with the nylon-Velcro strap.

2. Resistance: Add weight discs to the vertical post (free weight not supplied).

3. Movement: Either move the foot away from your body or the body away from the machine, maintaining tension.

4. Stretch & Isolation: Designed to deliver the “Super Stretch” to your shin and ankle. Perform repetitions and isometrics while lifting the toes to fully isolate muscles.

Outside Ankle Workout:

  • Stretches and strengthens ankles from slightly offset positions

  • Move laterally away from the machine while slightly bending the knees

  • Builds ankle and shin muscles for sharp, quick cutting angles

  • Faster backward speed

Inside Ankle Workout:

  • Reverse the isolator for inside ankle activation

  • Cross legs to stretch the ankle while focusing on lifting with the ankle muscles

Construction & Safety

  • Works on any floor surface

  • Non-marking protective bumpers

  • Built from high-quality, low-carbon 3/16″ steel

  • Handles maximum weight loads with ease

  • Delivers the same durability as our Calf-Isolator

Running shoes on a rocky path
Close-up of running shoes and legs

Your Leg Muscles Transformed!

The Calf Isolator doesn’t just build size—it defines muscles:

  • Gastroc & soleus definition
  • Behind-the-knee plantaris development
  • Supports knee rehab and lateral quickness

It also stretches the lower back muscles, increasing the range of motion. By working in a negative position with progressive resistance, muscles are strengthened differently than with free weights or impact training.

Total Isolation:

  • Fully concentrates on calves, ankles, feet, and arches
  • Increases blood flow like any isometric exercise
  • Uses your locked bone structure as the frame, allowing tremendous pressure to be safely applied
  • Standard springs deliver 100 lbs of resistance per inch of extension per leg

Results:

  • Jump Higher
  • Long, slender, strong muscles
  • Enhanced flexibility and recovery
  • Solid foundation for any successful athlete

Order Today

All it takes is 10-15 minutes a day to get results you can feel. You'll never outgrow the Sky-King Calf Isolator-it's built to grow with your performance. Our isolators stand apart as they are:

  • Easy to Use: Simple setup for training at home or in the gym

  • Fast Results: Notice quick improvements in strength, balance, and power

  • Safe Workout: Delivers effective results without risky impact or instability

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Proven Power, Real Results

Bryce Drew - Houston Rockets

"To Sky-King, I faxed the order for a Sky-King. We had one at college, but now I need one down here. Thanks and hope you hear from you."

Colin Murray - Scotland, UK

"I have been viewing your website with great interest, as I have not seen your products advertised anywhere here in the UK. I am a keen martial artist and am always looking for new techniques to improve my speed."

Bryan Stenehjem- Anchorage, Alaska

"Wanted to let other athletes and sports teams know the success our girls' volleyball team has had with the "Sky-King Calf Isolator." We started using this system at the beginning of our school season three weeks ago. All players have shown an increase in quickness and vertical jump. The entire workout takes only 20 minutes at the most, and we include it in our practices three days a week. I would recommend this to all athletes who are interested in getting a great calf workout and increasing their vertical jump."

Janet Conner - Martinsville HS

"Ken, for all the good your machines have done us, I should pay you triple what they are worth. I honestly saw a young man dunk the ball with two hands for the first time in his life after only 2 weeks on the machines. Our boys' coach scoffed at it. He tried to tell the rest of the team that it wasn't a calf isolator, but all the other training he was doing. It was amazing that after he stopped the calf isolators when my class was over, he was never able to dunk with 2 hands after that. You know, Ken, I have always been a believer in the mental approach to the game. If that boy believed that the calf isolator made him better, why not let him do it and convince the others to become better? Some coaches can't see the forest for the trees.

Rufus Burks

So far, no complaints.

Sampler

A must have

Amazon Customer

I had one of these about 20 yrs old in college. Everyone I showed loved it. Unfortunately I let a college buddy hold it and I never got it back. I recently purchased again and still feel the same burn after a few reps.

Movie Scripts R US 2018

I used this product more as a calf stretcher than anything else. Unfortunately, calves are only a small percentage of vertical jumping power compared to your thighs and glutes.

To Order Fast, Just Call Ken!

Are you ready to jump higher and develop stronger feet for explosiveness? Do you want to be a Sky-King?