Supplemental Fitness Classes



From cardio to strength training to obstacle courses we have the perfect class to supplement your training needs.


If you’re looking for a challenge and to blast some fat fast, you’ll love our Metabolic Sweat class.

Interval training combined with battle ropes, kettlebells, slide boards, sledge hammers, bodyweight exercises and other functional training fun will help you torch calories and blast fat in just 45 minutes!

Class Times: 6AM, 7AM, 8AM, 3:30PM, 4:30PM, 5:30PM, 6:30PM


Want sexy glutes that not only look amazing but help you prevent injury, run faster, lift more and cycle further?

Then the Booty Burner class is for you!

Get ready to feel the burn in these lower body classes focused on strengthening your glutes! Tens of thousands of clients around the world are using Redefining Strength’s Booty Burners to develop strong sexy glutes and you can join our classes LIVE and in person every Tuesday!

Class Times: 6AM, 7AM, 8AM, 4:30PM, 5:30PM, 6:30PM

Wednesday Arms And Abs

Strong arms and abs not only look amazing, but can also help us improve our push ups and pull ups!

So if you want arms you’re dying to show off in a tank top while also achieving that first, or may even 15th, pull up, you’ll love our Arms and Abs class that will challenge your entire upper body!

Class Times: 6AM, 7AM, 8AM, 3:30PM, 4:30PM, 5:30PM, 6:30PM

Thursday Burn Intervals

We’ve all heard that interval training is the best way to burn fat and get faster, better results in less time.

And well…it is! Whether you want to hit a personal record in your next race or you want to blast fat to get lean and strong, our Burn Intervals class is the way to go.

You’re blood will be pumping and the sweat will be flying in these 45 minute classes!

Class Times: 6AM, 7AM, 8AM, 4:30PM, 5:30PM, 6:30PM

Friday Killer Core 

A killer strong core and flat abs not only LOOK amazing, but also help us prevent injury.

Whether your a runner, cyclist, crossfitter or OCR racer, you want to build a strong core so you can continue to train hard while looking and feeling great!

In our Killer Core class, you’ll work not only your abs but your entire core, including your glutes and back, with compound and hybrid moves that will help you build strength and burn that stubborn belly fat!

Class Times: 6AM, 7AM, 4:30PM, 5:30PM, 6:30PM

Saturday Obstacle Course Mania

Training for your first mud run or obstacle course race? Or maybe you’re just determined to achieve the trifecta or hit a PR?

Or…heck…maybe you just really want to FINALLY climb that rope!?!

Whatever your goals are for your next obstacle course race, we can help you hit them with our Obstacle Course Mania every Saturday!

We’ll help prepare you for the obstacles you may encounter, including working on rope climbs, monkey bars, and grip strength, while also helping you to improve your conditioning….just in case you need to do any burpees on race day…

Hours: 8AM, 9AM

A Message From Cori

Too often we get focused on a goal weight. On what our friends, or someone on facebook is doing.

But we can’t get focused on comparing ourselves to others. We can’t let a number on a scale define us. We can’t keep beating ourselves up when we feel like we aren’t progressing as fast as that person did on Instagram.

We need to realize each of our journeys to feeling strong, confident, healthy and happy will be unique!

That is why I created Redefining Strength.

I wanted to create training programs that focused on individual’s needs and not only helped them get the strong, lean bodies they want, but also learn to enjoy the journey.

Because we are all constantly a work in progress. And each day is a chance to grow stronger, fitter and happier!

I’ll help you reach your fitness goals and make lifestyle changes that STICK for REAL RESULTS!

Together we can go farther than we could alone. Let Redefining Strength help you along your fitness journey.

– Cori Lefkowith

The Gym




08 AM – 10 AM



(949) 287 3123


2930 Grace Lane Unit K
Costa Mesa, CA 92626