Establishing an effective, sustainable exercise routine is a key component of any weight-loss strategy, says Russell F. Camhi, a primary care sports medicine physician at the Northwell Health Orthopaedic Institute in Great Neck, New York. He’s head team physician at Hofstra University in Uniondale, New York, and an assistant professor at Hofstra/Northwell School of Medicine.

These days, it seems every celebrity has a diet or workout protocol they recommend above all others. As one of the hottest celebrities in Hollywood for years, Jennifer Aniston is no different; recently, she’s been touting the benefits of the so-called 15-15-15 workout plan, or the Jennifer Aniston workout. And trainers say this approach is more than just a gimmick, it’s straightforward and accessible.

Strong is the new skinny.

The internet has revolutionized virtually every industry, including the fitness industry. In recent years, the availability of training via online platforms has vastly increased. So how does online personal training stack up against in-person workouts?

Do you really need to warm up before you exercise? Are warmups before exercise just a waste of time?