Look out for the companies Fitwall, Vertical Training Systems or anything that has to do with Doug Brendle. This guy is a crook and will steal you blind. He creates a company, brings investors in and then bails. Leaving everyone hanging. He is full of lies and his equipment is a joke. Doug Brendle knows nothing about Fitness and his “claims” to his vertical training are false. There has never been testing to prove any of these claims. Do not do business with Doug Brendle. If you choose to then you will simply be next.