• YouTube - Black Circle
  • Facebook - Black Circle
  • Instagram - Black Circle

©2019 by JKFIT


Hi, my name is Jennifer Kersten and I am the owner, head coach, and creator of INJA Fit.


My introduction to the fitness industry was not different than many of you. It was mesmerizing, exciting, addictive, and confusing. When I began training in 1996, women were rarely seen in the weight room and we were all recovering from the low fat/high carb craze of the 90's.

Yet, I found myself in love with strength training, watching my body change, studying nutrition, and then preparing for my first fitness competition. I followed along advice given to me, as well as in magazines, and stepped on stage. Watching my body transform for the first time and the attention that it garnered me was beyond addicting. 

The body coupled with the element of performance in my fitness routine had me hooked immediately, so I carried on competing.


Eventually I hired a coach to help me, but methods back then were rarely based on sustainability, and it was deemed normal in my social sub culture to diet, regain, and diet again.

For years I carried on this cycle while working within the holistic nutrition industry, teaching group fitness, and training competitors. I was consistently landing in the top five nationally, and my clients were winning contests, so I kept sharing the same bro science that I followed.

Yet, beyond our trophies, we were receiving the same results:



A poor relationship with food.


Negative self-image.




It was not until 2007 when I sat down with Scott Abel where I began to have some light bulb moments in regards to my methods and what was happening to my body physically.  It honestly had not occurred to me that 'my methods' were the problem because I believed that it was the consequences of a 'weak mind' that I could not keep my body in shape year round.

Yet, at that point, I did not want to step away from the stage; I only wanted to get better so that I could compete that year.

So I carried on with the same methods that were breaking me down:


Endless cardio.


Five foods.

Fear of food and weight regain in the off-season.




In 2008, I achieved my goal of winning a national title in Canada and I knew in that moment that it was time to change. For my health, for my clients, and so that I could live in a body year round that mentally was at peace.


With the assistance from Scott, and a lot of humbling patience on my behalf I found myself in a healthier body and mind.


From there I changed my methods as a coach, competitor, and gym rat.

I adopted a flexible approach to my nutrition planning.


I began training in a way that benefited metabolism.

I reduced my overall cardio and began lifting heavier weights.


I began losing body fat without extreme methods.


I sustained a healthy body composition year round.

I put on a bathing suit in public…. Without being in contest shape.



… When I began INJA Fit in 2013 it was because I had sat back and watched as countless women went through the same pattern of self-abuse that I did. As a mother, coach, competitor, and former judge in my province, I could not be a part of that mental and physical breakdown anymore, and I wanted to be a part of positive change in the industry that I love.

When clients come to me it is because they are ready to reset and change. 

I am persistent at helping them reach their goals, and I am always in their corner... but I am honest and blunt.

I have now coached over 100 women on and off the stage, and I have watched lives, bodies, and minds transform before my eyes. My competitive clients have won pro cards and my lifestyle clients have won their relationship with themselves back. Food does not have to be that complicated and training should be enjoyable since we are cultivating a lifestyle.

I believe that coaching is based on communication, accountability, and honesty. In other words, I'm going to keep it 'real' with you. 


Since fitness is more fun with friends... so I brought mine along to be a part of this mission. I love my INJA Fit community and these women that took a chance on a little thing called "Inner Jewell Athletics" back in 2013. If I can not help you then the amazing coaching team at INJA Fit can. Each coach has been trained and mentored by me for over four years. We all work as a team and ensure the best for our clients! This is how we succeed :) 

I am honoured that you are here,


Owner and creator of INJA Fit