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This Isokinetic machine is a secret weapon in developing speed and power, and has been used by many professional athletes across the country, including Troy Polomalu.

Learn About the

Iso Machine

This machine is similar to the feel of a concept 2 rower with twenty times the resistance power. The machine offers a variety of different explosive exercises for the upper and lower body including: Squat, Leg Press, Bench Press, Rows, Triceps, and Biceps.

The advantage of the iso machine is that it provides a constant resistance through a full range of motion. Generally, weight training forces the athlete to decelerate and lose speed at the top portion of the lift, which effects power output.  Training on the iso machine eliminates deceleration and forces the athlete to push as hard as possible at the beginning and end of the concentric portion of the exercise, ultimately leading to greater levels of speed and explosive power.

In our opinion, this machine can be used effectively in two ways. First, if you are a firm believer in converting strength into speed, this machine is a great tool to balance heavy weight training with speed lifting. In our system, we do heavy lifting one day per week and a day speed lifting later in the week using the iso machine. It is a great change up to replace cleans, speed band squats, or other explosive lifting exercises used on a speed lifting day.

Second, if you are against weight training and believe in the Marinovich system, you can use the machine as a replacement for weight training. Although we believe it is best to build a strength base using traditional weight training in conjunction with the machine, either way has its own benefits and it is up to the trainer’s determination.

The Iso Machine


The iso-machine, originally called the Jumper, was built in the late 1970’s by Mike Mattacks. The machine was made popular in the early 2000’s by Marv Marinovich, who trained Troy Polomalu using the iso-machine in replacement of conventional weight training. Marv trained Troy two months before the combine using this machine. Troy final combine improvements were as followed: 4.5-4.3 40yd and 35-43″ Vertical jump.

CoreXcell has been using this machine over the last decade and recently remanufactured it in 2013. This machine is a great tool to have in your training arsenal and if used correctly, produces excellent athletic gains.


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Corexcell is ready to help you train – whether you’re injured, trying to get out of pain, or looking to reach your full fitness potential. Schedule your session today by calling, emailing, or filling out the form. We look forward to hearing from you!!

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