If you are having problems with your GS Trainer, please read through the FAQ below.  Alternatively, you can contact us at

The GS Trainer should last for 36 hours of usage. However, we do recommend charging the force sensor and receiver every other day as charge can affect the function.

When the GS Trainer receiver and force sensor have low battery, it can affect the functioning of the overall product. When this happens, we recommend you charge both the receiver and the force sensor and try again.

You can perform a hard reset by inserting a small paperclip into the small pinhole on the transmitter unit.

You will need to compress bond ends gently for 3 minutes until the green light switches off.

This depends on the training load. Each shock cord is 5kg. If you want a training load of 20kg, we would recommend using 5 shock cords which will you give you a total tension of 25kg. Alternatively, if you wanted to train with 12kg, we would recommend using 3 shock cords as this would give you a total tension of 15kg.

This depends on the type of exercise you want to do. If you want to workout a particular joint/muscle e.g. elbow through its FULL range of movement, then we would recommend using the long cords. If you want to target the muscle in a particular range, e.g. the outer range, then we would recommend the shorter cords. The shorter cords will get you to the desired load through less movement than the longer cords.