Courtney Belcastro is a master of many trades – including pumping you up in the boxing ring, on the treadmill or with a set of dumbbells.

If you try to catch her class in Chicago, chances are you’ll have to book your calendar weeks in advance. Luckily for us, when she’s not coaching at Title Boxing Club or Shred415, Courtney’s mixing up her workouts on SweatWorking which you can download and use without any advance planning.

The best part about her Core Crusher challenge and individual workouts available to you on the app is that you don’t need a ring, a treadmill or weights to feel the burn by Courtney. This set of oblique-focused ab exercises, for example, is just one of the many kinds of killer workouts you’ll get when you work out with Courtney.

Try her 15-minute Obliques on Fleek workout and if you like what you try, it’s not too late to sign up for the #BreakSweatNotGoals challenge where you can work out more with Courtney and try the other coaches’ total body workouts on the app alongside a team of more than 100 others going through the workouts too.

Here’s your 15-minute ab workout of the day:

Take on the specified number of reps of each of the following movements:

• Flat leg crunches (12 reps)
• Alternating Russian twists (24 reps)
• Full extension, crunch together (12 reps)
• Alternating oblique toe touches (24 reps)

Next, complete each kind of plank for 30 seconds:

• Side plank hip lifts, right (30 seconds)
• Side plank hip lifts, left (30 seconds)
• Forearm plank hip dips (30 seconds)

Then, take on the specified number of reps of this set of moves:

• Alternating bicycles (24 reps)

Finally, complete each kind of planks for 30 seconds:

• Military plank with knee-ins (30 seconds)

• Forearm plank (30 seconds)

Rest for one minute, then repeat the entire set from the top one more time! 

 

(Disclaimer: This workout is not intended for the treatment or prevention of disease, nor is it a replacement for seeking medical treatment or professional nutrition advice. Do not start any nutrition or physical activity program without first consulting your physician.)