Meghan Markle's longtime trainer Craig McNamee reveals exactly how the royal-to-be keeps her body strong and lean.

Whether you’re rockin' a swimsuit, a little black dress or a tank top, you want to show off strong, lean arms. But toning your arms is more than just for looks: It's good for your overall health and fitness. Research indicates arm exercises can actually help reduce muscle pain in your neck and traps.

If you hop on the elliptical or treadmill and zone out for 30 minutes, your workout strategy needs help — especially if your goal is to burn fat and lose weight. All you need is one minor tweak: interval training.

Navy SEALs are some of the toughest and most highly trained men in the American military. Because they conduct dangerous missions both in the water and on land and often under the cover of darkness, the skills and requirements to become a SEAL are much more rigorous than any other branch of the Armed Forces.

Tabata, HIIT, kettlebells, CrossFit … sure, tough workouts are hogging all the headlines these days, but that doesn’t mean you should completely ditch moderate-intensity exercise. In fact, here are seven good reasons you should be doing moderate- to low-intensity exercise more often.

Sitting at your desk for long hours in “chair pose” can lead to chronic pain all over. Luckily, there’s a simple solution to prevent and relieve that tension -- practice yin yoga at your desk.

Got low testosterone? Try one (or all) of these six ways to raise your testosterone levels naturally.

If the outer calf (the gastrocnemius muscle) feels particularly tight, stretching this area could provide relief.

Aerobic exercise has been used by humans for millennia to promote health and happiness, as well as looks. Classes began in the 1970s and have progressed since.

Rash guards are worn in no-gi competitions and training to denote rank, wick sweat and protect the wearer from mat burn.

Body Balance classes combine the mind-body practices of yoga, tai chi and Pilates to lengthen and strengthen the muscles and focus the mind.

The new fitness trend on social media is low-intensity steady-state cardio, or LISS. Should you be doing it?