Here’s a basic breakdown of high-intensity interval training for the newcomer.

Grab a monofin and perfect your dolphin kick for the ultimate mermaid-level abs.

Set sail for an epic trip centered around your active, healthy lifestyle.

Attack your core and condition your entire body with this functional power circuit.

Determine how much sugar you’re consuming — and its impact on your workouts.

Boost your nutrition with these five refreshing, summertime recipes.

Follow the advice of certified trainer and nutritionist Andrea Metcalf to live it up this summer without sacrificing your fitness and nutrition.

OC4 coach Jen Widerstrom explains how protein and fat work together to help you shed excess weight.

OC4 coach Jen Widerstrom explains the difference between high- and low-quality protein.

Here’s a basic breakdown of high-intensity interval training for the newcomer.

Grab a monofin and perfect your dolphin kick for the ultimate mermaid-level abs.

Attack your core and condition your entire body with this functional power circuit.

Complement your workouts with Pilates to increase flexibility, muscular strength and balance.

Jump to increase your fat-burning potential.

Ever feel charged up after a run? Recent studies tell us why.

Get in shape to hit the trails this summer (or just look like you could) with this cardio/resistance- training combo designed to get you to the summit.

The exercise you love to hate comes in several flavors. Read on to get a taste of the pain rainbow, then join the #OxygenBadassBurpees Challenge — if you dare!

Authentic, ambitious and altruistic, cover girl Massy Arias — aka Mankofit — is on a mission to change the world, one social post at a time.

Determine how much sugar you’re consuming — and its impact on your workouts.

Boost your nutrition with these five refreshing, summertime recipes.

Follow the advice of certified trainer and nutritionist Andrea Metcalf to live it up this summer without sacrificing your fitness and nutrition.

Reaching your fitness and weight-loss goals all boils down to planning ahead.

Though small in size, blueberries pack a big nutritious punch. Here are five ways to enjoy this wholesome summertime staple.

Protect your health with these immune-boosting nutrition tips.

Take the guesswork out of smart snacking with this mix-and-match food matrix — tasty ideas await!

These 12 research-backed nutrition hacks and quick-fix strategies can help you get your body bikini-ready.

This trio of trace minerals could hold the key to improved endurance, function and speed.

Protect your health with these immune-boosting nutrition tips.

No partner? No problem. You alone hold the key to reaching your goals.

Whether you’re training for your next competition or just trying to get healthier, you don’t have to go it alone.

It’s time to embark on a new kind of fitness program with Oxygen Challenge coach Erin Stern.

As they say, a goal without a plan is just a wish. And you deserve to give yourself more than just wishful thinking when it comes to fitness.

Whether during a family gathering or on a snow day from school, there’s no shortage of fun ways to get physical this winter.

Hiring a personal trainer is much like any other professional you’d hire, you want to make sure you find the right one.

Be aware of the changes your body is naturally experiencing as you advance in years, and adjust your habits and expectations accordingly.

Enjoy yourself without dreading the aftermath this holiday season.