Each month, a new trainer takes us through four of the best workouts they have in their back pocket. Follow along weekly for new ways to sweat it out with us. See All "We'll do each move for about 60 ...

Welcome to a high-energy ab workout that will leave you feeling strong and sculpted. High-intensity interval training (HIIT) is the perfect blend of cardio and strength training. When you focus on ...

If strong, toned abs are your goal, this simple, fast, four-minute Tabata core circuit will get you there, but be prepared to sweat for it. Tabata is a form of high-intensity interval training (HIIT) ...

You want a ripped, chiseled core, the kind that looks great when you take your shirt off, and also lends you stability and strength in all situations. And building that core is a two-step process.

Challenge your core and cardio skills with this 10-minute HIIT workout led by fitness trainer Natalie White. She's joined by class members Luisa Fonseca and Madisyn Maniff for this high-energy cardio ...

Ready yourself for this full-body 30-minute workout that combines Pilates, HIIT, strength, and cardio for a workout that will keep your body guessing. When it comes to carving out time to work out, ...

For celebrity trainer Jeanette Jenkins, fitness can double as family bonding. On Tuesday, the Los Angeles–based creator of the Hollywood Trainer posted an Instagram video of her and her 14-year-old ...

HIIT workouts are meant to be fast and furious. They rely on explosive exercises like burpees, high knees, kettlebell swings, sprints, and other moves that spike your heart rate and make you sweat — ...

Although it is common knowledge that exercise provides benefits, many people can find it difficult to find time for regular physical activity. High intensity interval training (HIIT) has gained ...