A doctor explains why you don’t need a medical degree to improve the health and fitness of a client with diabetes … as long as you remember the limits of your expertise.

The much-maligned weight-loss strategy may be exactly what some of your clients need. Here’s how to know if they’re ready for it, and how to help them if they are.

No matter how well your favorite training style works for you, few clients share your goals. Even fewer are ready for such advanced workouts.

Extreme weight loss comes with a side effect that can be unpleasant, unwieldy, and even unhealthy for your client. Here’s what you can and, more important, what you can’t do to help.

New moms are often in a hurry to get their pre-pregnancy bodies back. But if they’re experiencing symptoms like incontinence, back pain, or a “poochy” stomach, they could have serious injuries that require a more cautious approach.

"How do you reduce gluten in a Snickers?" Every day, clients ask trainers questions that range from naïve to misguided to flat-out bonkers. Here’s how to respond in a way that engages clients without insulting them.

Working with famous people can elevate your career and your income. But it’s harder than it looks. Here's how to get into the celebrities’ world (and why you may not want to bother).

They’re affluent. They’re eager to get started. And they can be the most loyal clients you’ll ever have. But they also have unique challenges, and present unique risks, that you need to understand before you start working with them.

If you’ve ever considered giving away free training, read this before you do anything else.

Whether you’re an online personal trainer or training clients at a gym, honest client feedback gives you a quick glimpse at how you can improve (and make more money).