From “how much?” and “how often?” to supplements and vegan options, here are the answers to your clients’ most pressing questions.

What can you learn about marketing from a 20th-century campaign to sell cough medicine? That it pays to sell pain.

If you regularly discuss testosterone, thyroid hormones, and adrenal problems with your clients, here’s what you need to know … and why you may want to avoid the topic altogether.

The highly motivated client presents a challenge we’re rarely prepared for. Here’s how to help that client succeed before burnout or injury derail your program.

Many fitness pros want to share their knowledge by writing. Here’s what happened when a fitness writer decided to use her knowledge by training.

With the help of a good voice teacher, the author learned how to make the most of what he has as a singer, and how to help his clients get the best possible results for themselves.

Is Warren Buffett’s “say no to almost everything” good advice? For whom? When? Here’s how to decide.

How do you handle a toxic client? Avoid burnout? Get the right kind of attention? After 17,000 coaching hours, here’s what one trainer wishes he could’ve known when he started out.

It’s not just the opposite of losing weight. To build solid muscle, you need a solid plan, a lot of patience, and occasional reminders to be careful what you wish for.

Advice and affirmations that work for most clients may have the opposite effect on a recovering alcoholic or addict. Here’s what you need to understand, from someone who’s been there.