The TRX Force was originally made for the army. That is also the reason why this suspension trainer is lightweight, but can have a lot of resistance. The handles are made of rubber so you have a good grip. The TRX Force has a special app, the TRX Force Super App, which can be used offline. This 12-week fitness program has 3 different progress programs. This way your body gets a new impulse every time and you get the best out of yourself.