The 6 YouTube HIIT Workouts That Made Me Sweat Like Crazy in 30 Minutes or Less

If you're new to HIIT, this workout is the way to go. It's just 10 minutes and each move is demonstrated a few times before the interval so you can really get the hang of it. It's four moves: burpees, X-jumps, mountain climbers, and pencil jacks, 30 seconds each, repeated in three rounds with rests in between each move. There's no music, so cue up your own playlist and hit play.

Oh hey, it's Nina Dobrev, featured in the hardest HIIT workout I've ever done. Seriously — I've followed this video at least five times now, and I still can't complete every circuit. The hardest interval alternates push-ups and burpees; you do two of each, then four, then six, all the way up to 10. And then back down. Good thing the soundtrack is on point, because you're going to feel the burn everywhere.

This tough Tabata-style workout uses weights to work muscle groups that some HIIT workouts don't get to, like your chest, back, and triceps. Of course, it starts with a quad-killing leg interval and includes a cardio set in the middle, so don't worry; you're hitting all your bases here.

I love this workout because you can personalize it to your fitness level. During your rest intervals, you can either take a quick break or go into another exercise, like squat jumps or mountain climbers. The "on" intervals are challenging no matter what. Best part: it's only 15 minutes.

This workout is full of hybrid moves, like lunge-squat jumps and donkey kick-burpees, and the added weights (which are optional) make it even more challenging. This is a more advanced video, so don't hesitate to take a break or go with modifications if you need to.

This is a short, effective workout you can do just about anywhere, and the core focus is amazing. It's just five moves, 40 seconds each, for five rounds total. Simple enough, but so challenging.