The Isokinator Classic Review

Koelbel-Classic-UKIsokinator Classic Quick Review. The handheld Isokinator Classic (Pictured) is a very portable, mobile training device that was made by Gert F. Koelbel. Do you remember a device called the Bullworker? Well, would it surprise you discover that Gert F. Koelbel is also the man who brought us the Bullworker. It’s true. He is an inventor with an obsession for designing innovative portable training devices.

The Bullworker previously was a very well-known device in its heyday. And now, with the introduction of some newer models such as the X5 and Steel Bow, it continues to remain a popular name around the world. The Isokinator range seems to be gradually following the trend, as more people look for new ways and unique methods to do their resistance / isometric exercises while living a busy, always on-the-go lifestyle.

So, what does the Isokinator Classic actually offer?

Using strap(s) that attach to the device (comes with two included for hands and feet but more can be purchased separately), it has the functionality to allow the user to perform seven basic training exercises, and 28 additional resistance / isometric exercises. However, with a little creativity you can think up many new ways to use this device. And if you use the Isokinator in conjunction with other training methods, which is recommended, you can really push your fitness, muscle definition and mass to the next level.

Isokinator Spaceman hand-held gym by Koelbel Training

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If you have little time to spare and want a quick, measured, all body workout, this device can offer that in a little over 20 minutes. The muscle isolation, as in the ability to laser target certain areas / muscles is one of the features where this little machine is in its element. It’s basically like mobile weight lifting machine. But instead of using actual weights it uses tension. The twin brass balls indicate the pressure / tension level. And the desired positioning of these metal balls when the machine is in use is to keep them sitting at the top of each hole that is situated below on either side. It’s quite a strange device in appearance and with its method of operation, but one that many surprised reviewers say works a charm. Takes a little getting used to, but you soon get the hang of it.

How much resistance can it put up?

Fully adjustable, the Isokinator Classic starts at 0KG and goes all the way up to a muscle straining 90KG. With this type of weight range it really can cater for the complete novice right up to the person who trains all the time. Of course, if your one of the Worlds Strongest Men you would probably need something a bit more heavy-duty. But the Classic model will be more than enough for 70% of the people out there. Feeling strong? Perhaps the Classics BIG BROTHER, the Green Giant might be more up your street. Offering double the max resistance of the Classic. That’s a massive 180KG.

Did you know that there are many different Isokinators?

There’s not only the Classic and the Green Giant, but also the Spaceman and the “Lady” models. These four products basically cover the majority of people. From men and women, to even the younger generations. However, other than different maximum tension levels and a few differences in product materials / product weight, they aren’t that different to each other. They all share the same design and same workout routines.

Koelbel Build Quality

One thing, among others, that really stands out with Gert F. Koelbel’s products is the impressive build quality. The Bullworker was renowned for being a tough, sturdy device. Even today, take a look on eBay and you will see many of the earlier model Bullworkers being sold, still in good working order! The same build quality is found in all the models. Although it has been up and down in the last decade, the German reputation for reliable, well-built products is alive and well in the Isokinator. So much so that they all come with a twenty year guarantee. They really are built to last.


With such a high quality product comes a fairly high price tag. These devices are not cheap. But they are dependable, extremely portable, effective, and offer something quite novel and unique. There’s something quite sentimental about having this little mobile helper that allows a person to be able to exercise no matter where they may be. Can’t afford one? Well there’s always the floor, which supplies a complete training gym all of its own. The floor, your bodyweight and motivation is all you really need if short on funds. And it’s totally free. However, if you were a fan of the Bullworker, don’t have much time for exercise, or just want to try something a bit different, the Isokinator range is well worth a look.

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