What areas of knowledge does a basic personal fitness training certification cover?

As a gym owner or manager, you're in charge of hiring personal trainers and checking credentials. You probably already know that a trainer must hold a certification from one of the recognized, accredited fitness organizations in order to be qualified to train individual clients. However, not everyone knows that the entry level personal training certification does not qualify a trainer to teach group fitness classes or give clients detailed nutrition plans. If you're in charge of checking backgrounds and choosing the best candidate among a pool of potential fitness trainers, it's important you're clear on what exactly the various levels [...]