Meet Alexander Zierhut: The Science Behind Peakfit Studio

You have probably had a trainer who counted reps on their phone while scrolling through Instagram. You have probably had a trainer who ran you through a workout they googled twenty minutes before you walked in. You are not looking for that trainer. You are looking for someone who actually knows what they are doing — and who is paying attention to your body, not theirs.

That is the standard we built Peakfit Studio around. And it is the standard Alex Zierhut carries into every session he runs.

Alex is the head trainer and co-founder at Peakfit Studio — Arden’s Only Private Personal Training Studio for Adults 40+. If you come train with us, there is a very good chance you will be working with him. So it is worth knowing who he is, what he actually knows, and how he thinks about the work of getting you stronger.

The Credentials Behind the Coaching

Alex holds a Bachelor of Science in Exercise Science and Health Promotion from Florida Atlantic University. He is a certified Nutrition Specialist. He has spent years working with adults whose bodies carry history — old injuries, long desk careers, knee surgeries from a decade ago, a shoulder that “has never been quite right since.”

Here is why those credentials matter, specifically for people over 40.

A four-year degree in Exercise Science is not the same thing as a weekend certification. It is anatomy. It is biomechanics. It is exercise physiology, kinesiology, program design, and a working understanding of how the cardiovascular, muscular, and nervous systems respond to training stress at different ages and different stages. It is the difference between a trainer who can tell you that “squats are good for you” and a trainer who can look at how your hips move, notice that your left knee is tracking inward under load, and adjust the movement so you build strength without grinding down the joint.

After 40, that distinction is not a nice-to-have. It is the whole game. The margin for sloppy programming gets thinner every year. You do not have time to waste on workouts that hurt you, and you do not have tolerance for injuries that take six months to come back from. You need someone who understands why the program is built the way it is built — and who can adjust it in real time based on what your body is telling them that day.

Alex can do that. He was trained to do that. And he has been doing it long enough that he reads bodies on autopilot the way an experienced mechanic reads engines.

The Nutrition Specialist certification matters for a related reason. Strength training does not work in a vacuum. If you are under-eating protein, under-sleeping, or fueling poorly around your sessions, you will not recover well, you will not build muscle, and you will plateau faster than you should. Alex can have that conversation with you in a grounded, practical way — not as a supplement salesman, but as a trainer who understands that nutrition is part of the program, not separate from it.

His Training Philosophy

Alex’s approach is structured, science-informed, and individualized. He does not run people through workouts. He runs programs.

The distinction matters. A workout is a single session — forty-five minutes of effort that may or may not connect to anything. A program is a plan with intent. Every exercise has a reason for being in the session. Every session builds on the one before it. Load, volume, tempo, and exercise selection are all chosen on purpose, and they change over time as you adapt.

A few things Alex believes, and you will feel in the way he coaches:

Strength training is the foundation, not the extra. For adults 40 and up, strength work is non-negotiable. Muscle is the organ of longevity. It is how you stay functional, upright, and independent into your 70s, 80s, and 90s. Cardio is valuable. Mobility is valuable. But if you are only doing those two things and skipping resistance training, you are missing the piece that matters most. Alex builds every program around that truth.

Corrective exercise is baked in, not bolted on. Most adults walk into a training studio with some asymmetry, some restriction, some history. Alex’s programming accounts for it. If your left hip does not extend as well as your right, he is not loading you into deadlifts and hoping for the best. He is addressing the restriction inside the warm-up, choosing variations that do not compound the problem, and building the pattern back up carefully. This is not physical therapy — it is intelligent programming that respects what your body is actually ready for.

The program is designed for your body. Alex does not run cookie-cutter templates. The person in front of him dictates the plan. A 52-year-old runner coming back from a knee replacement gets a fundamentally different program than a 68-year-old grandmother who has never lifted a weight in her life — and both of them get a fundamentally different program than a 45-year-old executive who sits at a desk for ten hours a day. The principles stay the same. The application is specific.

Strength is trainable at every age. It is never too late. Alex has watched clients in their 60s and 70s add meaningful strength, rebuild lost muscle, and move better at 70 than they did at 50. Your body is capable of more than you think. His job is to meet you where you are and build from there.

What a Session with Alex Actually Looks Like

If you come in for your first session, here is what the experience feels like.

It starts with a conversation. Before Alex writes a single rep, he wants to know your history. What have you done? What have you hurt? What hurts now? What are you actually trying to accomplish — and what does “better” look like for you? He is taking notes and building the mental model of your body before he ever asks you to move.

Then a movement assessment. Not a fitness test. An assessment. He is watching how you squat, how you hinge, how you press overhead, how your shoulders move, whether your ankles have range, whether your hips extend. Five or ten minutes of careful observation tells him more than any questionnaire. This is the foundation of your program.

Sessions run in a private station. Peakfit is not a gym. There is no crowded floor, no line for the rack, no one hovering nearby waiting for your equipment. You train in a dedicated private station with Alex’s full attention. That is the whole point.

Programming is progressive and deliberate. Every session has a primary strength focus, accessory work chosen to support it, and conditioning or corrective work where appropriate. Load is adjusted in real time based on how you are moving that day. If your lower back is tight because you flew home yesterday, the session flexes around that. Nothing gets forced.

Coaching is specific. Alex does not count reps at you. He coaches the movement — cueing your brace, adjusting your foot position, asking you to slow the eccentric, telling you to drive through the whole foot instead of just the ball. You will leave sessions having actually learned something about how to move, not just tired.

Follow-up is part of the work. Between sessions, Alex is tracking what you did, what you lifted, how you moved, and where the next session needs to go. Nothing gets forgotten. The program compounds.

Why Alex Is Specifically Suited to Training Adults 40 and Up

This is where program design discipline stops being theoretical and starts being the thing that protects you.

Training adults over 40 is a different skill than training 22-year-olds. The 22-year-old can absorb a lot of bad coaching and bounce back. The 55-year-old cannot. One stupid session — too much load, too much volume, bad movement quality — can cost you three weeks. That is not a risk Alex takes with clients.

What you get with him instead is a trainer who:

• Respects your body’s history rather than ignoring it
• Progresses load carefully and tracks every session
• Chooses exercises that build strength without grinding joints
• Coaches with a communication style that is clear, patient, and free of the “bro” energy that makes a lot of gyms unbearable after a certain age
• Understands that you have a life outside the studio and programs accordingly — recovery, sleep, stress, travel all factor in

He is also genuinely good with people. He listens. He is not performing. He treats clients in their 60s, 70s, and 80s with the same seriousness and respect as a 30-year-old athlete, and that matters more than most trainers realize. You are not being talked down to at Peakfit. You are being coached by someone who believes you can get stronger and is going to help you prove it.

This is meaningful work for him. You can tell.

The Family Context

One more thing worth naming, briefly.

Alex is Katja Raab’s son. Katja founded Peakfit Studio after rebuilding her own body in her 50s following a breast cancer diagnosis and treatment. She built the studio she wished had existed when she needed it — a place where adults with real bodies and real histories could train seriously, safely, and privately.

Alex grew up inside that story. Fitness and nutrition were central in his household because his mother was living proof of what they could do for a body that had been through something hard. Training adults over 40 to get stronger — physically, mentally, and emotionally — is not an abstract career choice for him. It is the work he was raised around.

We mention it not to make the story sentimental, but because it is useful context. When Alex tells a client in her 60s that her body is capable of more than she thinks, he is not reciting a slogan. He watched his mother prove it.

That is part of why Peakfit feels different. Real people, real results — starting with the family that built it.

Ready to Train with Alex?

If you are 40 or older and you are tired of trainers who do not pay attention, gyms that are not built for you, and programs that leave you sore in the wrong places and no stronger than when you started — come see what training with Alex is like.

We run a free Strength Starter Session for new clients. You will sit down with us, walk through your history and your goals, go through a movement assessment, and do a real session in a private station. No pressure, no packages pitched at you mid-workout. Just a chance to see what the work looks like and decide whether it is the right fit.

You can meet the full team here, see our training programs here, and when you are ready:

Book Your Free Strength Starter Session with Alex

And if you want a preview of how Alex thinks about training adults over 40 before you come in, read our companion piece on the three things that actually matter for getting stronger after 40 (coming soon at /three-things-that-matter-for-getting-stronger-after-40/).

It is never too late to get stronger. You just need the right person paying attention.