Stand with your feet together. Lean forward slightly, step your left leg back and raise your arms out in front at chest ...

When it comes to getting the most bang for your workout buck, high-intensity interval training — or HIIT — is hard to beat. By frequently changing up your pace and type of movement, HIIT challenges ...

Presented by Athleta, this HIIT workout is basically a guaranteed confidence boost. Celebrity trainer Amanda Butler leads you through two different rounds of full-body interval training, helping you ...

Leg day doesn't have to last a long time — just ask ACE-certified personal trainer and Under Armour trainer Ariel Belgrave, who created this 20-minute lower-body HIIT workout. The session is part of ...

1. Broad Jump to Reverse Duck Walk x 1 min. Stand with feet at hip width. Hinge at hips to lower into a squat, then jump forward 3 to 4 feet. Land softly in a squat position, then walk backwards ...

A HIIT workout can be tricky to define because, at its core, it just means a string of exercises that gets your heart racing, providing a cardio boost to what would otherwise be a serviceable, but ...

We've all been there: obsessed with one specific workout, whether it's a so-hard-it-hurts HIIT class, a makes-your-bod-rock ...

Though it’s brief, it’s a solid sweat sesh that will fire up your booty and core, and leave you dripping in sweat. Atkins warms us up with some mobility drills, then heads into the strength work.

A HIIT workout can be tricky to define because, at its core, it just means a string of exercises that gets your heart racing, providing a calorie-burning cardio boost to what would otherwise be a ...