Our Instructors

They are ready to tackle anything that you throw at them.
Well, we’re talking figuratively, please no water bottles to the head!  We’ve done our homework and stick to the science behind the super efficient HIIT training benefits, while making your 60-minute workout buckets of sweaty fun.

Cathy Kerns

Cathy Kerns

The Owner

A fervent workout enthusiast, Cathy fell in love with fitness instruction the moment she taught her first class. Add to that her passion for High Intensity Interval Training, and HIIT Lab was born.

Tired of commuting to her workout, Cathy knew West Seattle was missing something – a kick-ass place where clients of all ages and levels can come get a fantastic workout and have fun doing it.

Spending less time in the car has meant more time growing a rather incredible community of sweat-a-holics.

Find her online
Whitney Mack

Whitney Mack

The Nutrition Nut

Whitney is somewhat of a rockstar. A holistic fitness, nutrition and real food lover kind of rockstar who teaches clients to know their bodies better so they can maximize their workout efforts. What that means for you? Results that last and permeate into all aspects of your life. An Integrative Nutrition® certified health coach and fitness specialist, this woman knows the body inside and out.

Whitney absolutely loves the HIIT Lab fitfam and bring all her expertise and knowledge to your 60-minute sweat sessions.

Find her online
Hilary Paris

Hilary Paris

The Guru

Hilary is a woman in the know.  She has experience in dance, yoga, functional training, half marathons, triathlons, cyclo cross racing, long-distance road biking, natural movement, figure and fitness competitions – you name it, she’s probably tried it. And rocked it.

She constantly researches the latest facts in fitness and nutrition so her clients don’t have to filter through all the noise to find the answers. You may even want her on your Quiz Night team. 

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Amanda Lezcano

Amanda Lezcano

The Warrior

Amanda doesn’t do anything halfway or even just 90%. Ironman Triathlons…. check. Spartan Races….check. Plane hit by lightning….check (we kid you not). This girl knows what it takes to push both mentally and physically to be the strongest and best version of yourself.

She is honored to take part in your journey by leading you through kick-ass workouts and inspiring you to push yourself beyond your limits.

Find her online
Kenzie Scofield

Kenzie Scofield

The Rookie

She may be the youngest, but Kenzie is far from inexperienced. An athlete her entire life, she knows what it’s like to come back after injury, starting her HIIT Lab journey on a bike due to knee issues. The process helped her focus on whole health, checking pride to the side.

It took hard work but now she’s back on the tread and super excited to cheer you on to reach your fitness goals too.

Find her online

Ready… Steady…