The #OxygenBadAssBurpees Challenge Day 14

We can’t lie. Today’s burpees are brutal. You only have two days left, though! Show us your grit and determination on social media.

Watch each video carefully, follow our instructions below, and post yourself crushing these burpees with the hashtag #OxygenBadassBurpees for your chance to win.

Beginners can do one to two sets of five to 10 reps each. More advanced participants can shoot for three sets of 15, 20 or more reps. You also can blend them into your existing exercise program, circuit, metcon or Workout of the Day.

One-Arm Push-Up Burpee

1. Stand with your feet about shoulder-width apart, arms at your sides.

2. Crouch and place your hands on the floor, then hop your feet behind you so you’re in plank — head, hips and heels aligned, spine and head neutral.

3. Jump your feet wide apart for stability, place one hand behind your back, then bend your elbow to lower your upper body down toward the floor as far as you can.

4. Extend to the start, replace your hand, then jump your feet underneath you.

5. Leap into the air and reach your arms overhead.

Duck-Walk Burpee

1. Stand with your feet about shoulder-width apart, arms at your sides.

2. Crouch and place your hands on the floor, then hop your feet behind you so you’re in plank — head, hips and heels aligned, spine and head neutral.

3. Bend your elbows to do a push-up, lowering until your chest touches or nearly touches down.

4. Extend your arms back to plank, then jump your feet wide underneath you, outside your hands if possible, then stay in a low squat as you sit up tall with your upper body.

5. Staying low, take four steps forward, wide and waddling, like a duck.

6. Extend your legs to stand and jump into the air, then drop right into the next rep.

Didn’t get a chance to sign up for the challenge? Join in the fun here.