Metabolism Repair · Body Recomp · Since 2001

Your Body Isn'tBroken. Your Approach Is.

You've been doing everything right. That's actually the problem.

You've prepped, restricted, white-knuckled, and started over more times than you can count. Your metabolism has been through it. Your hormones are a mess. And every time you go back to the thing that broke you, it breaks you a little more. I work with high-achieving women — ex-competitors, chronic dieters, driven women who are done being controlled by food — to repair what years of extremes have cost them. No more prep mentality. No more starting over. Just a body that finally works with you.

Apply to Work With Me See the Program
I See You

You're Not Lazy. You're Just Exhausted From Fighting The Wrong War.

You're tracking. You're training. You're cutting carbs, adding cardio, Googling HRT, and white-knuckling your way through every week. And the scale still isn't moving — or it's going the wrong direction.

Fat loss is absolutely possible. But not the way you've been doing it. Punishing your body harder with the same broken approach isn't a strategy — it's a cycle. And every time you go back to the thing that broke you, it costs you more than the last time.

Your metabolism has adapted to years of extremes. Fat loss happens when we stop fighting that adaptation and start working with it — strategically, not desperately.

Less is not failure. It's actually the whole point.
Meet Your Coach

Hi, I'm Jenn.

Metabolism Coach · Ex-Competitor · 25 Years In The Industry

If you've spent years doing everything right and your body still isn't responding — I need you to hear this. I've been exactly where you are. Not as a coach watching from the sidelines. As a woman who lived every extreme this industry had to offer and paid for it.

I started competing in 2000. I've coached women from their very first show all the way to the IFBB Pro stage. I've spent over two decades inside an industry that sells restriction as a solution — and I've personally experienced the wreckage that approach leaves behind. The broken metabolism. The hormonal chaos. The obsession that takes over your entire life.

"I had to rebuild my own metabolism before I could properly help others rebuild theirs. That wasn't a detour. It became the whole point."

The women I work with aren't lazy. They aren't undisciplined. They're exhausted from doing everything they were told to do — and getting less back every single time. That's not a willpower problem. That's a strategy problem.

Your body is not your enemy. It's been given the wrong information for too long. My job is to change that — and to help you build a body you actually get to keep.

Since 1996 Fitness training & group fitness coaching
Since 2000 Competing in fitness & figure · coaching competitors to IFBB Pro
2000 – 2014 Vitamins & holistic nutrition specialist
Since 2013 Online coaching · INJAFit founder · Jennifer Kersten Fitness
25+ Years In The Industry
1000s of Women Coached
2 Signature Programs
Work With Me
How It Works

This Isn't Another Program. It's A Different Approach Entirely.

Whether you're a chronic dieter who has tried everything, a former competitor whose body stopped responding, or a woman who wants to step back on stage — this works because we fix what's actually broken before we ask your body to do anything else.

Step 01

Repair First. Results Second.

Your body has been in survival mode. Whether that's from years of dieting, extreme restriction, or back-to-back preps — before we can ask it to lose fat or build muscle, we have to show it that it's safe. That means eating more, not less. Training smarter, not harder. It feels wrong at first. It works.

Step 02

Built Around Your Real Life.

This is built around your stress, your hormones, your history — not a competition deadline, not a crash diet finish line. Whether you're prepping for a stage or just want to feel like yourself again, the approach is the same: sustainable, strategic, and actually built to last.

Step 03

Fat Loss As A Byproduct.

When your metabolism is repaired and your body trusts you again, fat loss happens — without white-knuckling every meal. We're not chasing the scale. We're building the conditions where your body actually wants to change. The result is real, and it sticks.

Step 04

Stop Starting Over.

The all-or-nothing cycle ends here. You're not building toward a deadline you abandon — you're building something you keep. Whether that's a stage body or just a body you're not at war with every single day. The goal is to never have to start over again.

This is what it looks like when someone actually coaches your body instead of just handing you a plan. If you're done going back to the thing that broke you — this is where that ends.

We start with 16 weeks — because that's enough time to stop the damage, stabilise your metabolism, and give your body a real reason to trust you again. But let's be honest: if you've spent years or decades in extremes, 16 weeks is the beginning of the rebuild. Not the end of it. The women who get the most out of this are the ones who stop looking for a finish line and start building something they actually want to live in.

Apply to Work With Me
Who This Is For

You're In The Right Place If...

  • You're a current or former competitor who has been through prep cycles, extreme cuts, and the rebound that follows — and you need someone who actually understands what that does to a body, a metabolism, and a mind.

  • You have substantial weight to lose and you've tried everything — every diet, every plan, every reset — and nothing has stuck because nobody has addressed what's actually broken underneath it all.

  • You're on a GLP-1 medication and the scale is moving but you're losing muscle, feeling weak, and have no idea how to eat or train to protect your body while you're on it.

  • You've been dieting on and off for years — cutting carbs, adding cardio, white-knuckling every week — and your metabolism has adapted to the point where nothing moves no matter how hard you push.

  • You're exhausted and hormonally wrecked — running on caffeine, sleeping like garbage, bloated, achy, and still showing up because you don't know what else to do.

  • You've been misled by coaches, programs, and plans that ignored your history, your hormones, and your age — and handed you the same cookie-cutter approach that made things worse.

  • You want to step back on stage but know your body needs to be properly repaired before it can be pushed again — and you need a coach who will be honest about what that actually takes.

  • You're done starting over. Done with Monday resets, 30-day challenges, and one more prep that falls apart. You want a body you actually get to keep — not one you have to earn back every few months.

This isn't for you if...

You're looking for a quick fix, a 30-day challenge, or someone to hand you a meal plan and disappear. This is real work, done properly, with a coach who will tell you the truth even when it's not what you want to hear. If you're not ready for that — it's probably fine. Come back when you are.

Client Results

Are You Next?

Thousands of women. Every body different. Every plan built around her — not a template,not a one-size-fits-all fix. Just what happens when someone finally coaches the woman in front of them.

Ready To Stop Starting Over

It Starts With An Application.

Whether you're looking for full 1:1 coaching or structured training through SHIFT, the first step is the same. Fill out an application so we can figure out where you are, what you actually need, and whether we're the right fit. No pressure, no pitch. Just an honest conversation. Coaching is an investment in yourself and we want to make sure it's the right one before anyone commits to anything.

Apply to Work With Me Applications are reviewed within 48 hours. This is for women who are serious and financially ready to invest in themselves.