In The Core Athlete
In The Core Athlete
Athlete Zone
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In The Core Athlete

Adult Fitness Classes

Morning classes in Boulder. 6:00 and 7:00am, Monday through Friday.

Three coached group programs under one roof — Adult Performance, Healthspan and HYROX. Fifteen people to a class. Book the session you want. No membership, no contract, no minimum.

Book a class
New here? Three classes for $50
Training regularly? 10 classes for $240

The week at a glance

Adult Performance and Healthspan

  • Adult Performance: Monday, Wednesday, Friday, 6:00 to 7:00am
  • Healthspan: Monday, Wednesday, Friday, 7:00 to 8:00am

HYROX

  • Tuesday and Thursday, 6:00 to 7:00am and 7:00 to 8:00am
  • Same session both times, so take whichever fits your morning

What it costs

Three classes, sixty minutes each, fifteen people max

Healthspan

Monday, Wednesday, Friday at 7:00am

Holistic strength and fitness for lifespan. Fitness and strength naturally decline with aging, unless you do something about it. This class is not just about slowing down losses — the goal is to help everyone regain strength, coordination, balance, fitness, muscle mass and bone density, and confidence in their ability to look, feel and perform better every day.

What you train

  • Cognitive health
  • Balance
  • Strength
  • Overall fitness
  • Bone mineral density

Adult Performance

Monday, Wednesday, Friday at 6:00am

High-variety workouts for all levels. Need an encouraging diverse group to keep you accountable and make workouts fun? You’ve found the perfect class. Younger, older, beginner, advanced — we’ve got it all. Always be ready for a good challenge.

What you train

  • Balance
  • Strength and power
  • Endurance and stamina

HYROX

Tuesday and Thursday at 6:00am and 7:00am

Race-specific training. Whether you’re a first-time competitor or a HYROX enthusiast, the workouts in this class are tailored toward making sure you crush your next HYROX challenge with confidence and a new level of performance.

What you train

  • Running efficiency under fatigue
  • Station-specific strength and endurance
  • Grip and pulling durability
  • Pacing and transitions

What people say

In The Core Athlete

Bob Reeves

senior

I am 70 years old and I have been attending the Healthspan In The Core training for the past 9 weeks. I am amazed at how much better my body feels and at my increased stamina and strength and even my mental acuity! Before I started going to the training I wasn’t doing much, just walking the dog and chores around the house. I had pain in my lower back and neck and I lacked energy. Now, I feel great! Aaron and Ryan meticulously plan the week’s training and they seem to know exactly what my body needs. They work on your mind-body connection, balance, flexibility, strength and more. I look forward to each day and although it is a tough workout, I feel amazing the rest of the day. I highly recommend Train In The Core!

Portrait of an In The Core Athlete client

Nathan Johnson

Program Director and Instructor, Ellerslie Training

I have never considered myself an “athlete,” but In The Core has shown me I do have athletic tendencies. The trainers started at my fitness level and continually encouraged me to find the athlete within … which has given me excitement for fitness and losing weight … and at the same time has boosted my confidence as I see continual progress in my strength, endurance, mental focus, and overall ability. In The Core is the highlight of my week!

Your first class

  • Book online. Pick your class and your morning, and your confirmation arrives straight away.
  • Sign the liability waiver before you come in. It takes two minutes and we cannot train you without it.
  • Arrive ten minutes early the first time. Suite F, with free parking directly outside.
  • Bring training shoes and a water bottle. We have everything else.
  • Plans change? Cancel or reschedule any time right up to your start time, from the link in your confirmation email. No charge, no conversation needed.
Sign the waiver

Good to know

Before you come

  • Every class is mixed-level by design. The coach adjusts the load and the movement to the person.
  • No experience needed. Plenty of people start here having done nothing for years.
  • Form comes before load, always. It is why people who arrive with old injuries tend to leave moving better.

At the gym

  • 5455 Spine Road, Suite F, Boulder. Free parking directly outside, no permit and no meter.
  • One single-occupancy men’s bathroom and one women’s. No showers.
  • Fifteen people to a class. If one is full, join the waitlist and you will be notified the moment a spot opens.
Coach Jack DeFrancesco

Your coach

Jack Defrancesco coaches every morning class.

Jack competed as a Division I pole vaulter at Chapel Hill. He worked hard and stayed committed, and still fell short of the athlete he knew he could be. What closed the gap was not more effort — it was the right system. That sent him deep into training science, nutrition, recovery and program design, and eventually into changing his major to Exercise and Sport Science and earning his NASM certification.

Because he runs all three classes, whichever one you pick you get the same coach — one who remembers what you lifted last week and what your knee was doing in March.

Book a class with Jack

Here at ITC, we educate athletes on the importance of different lifestyle choices on recovery and performance. This pyramid of recovery concepts provides an overview for how we teach athletes about recovery and how significantly it can affect their performance.

Recovery pyramid with sleep as the base, then nutrition, stress management and training volume, and recovery modalities at the top — the tools nearest the base matter most.

Geno's Story

My son Dante has been training at In The Core since 2019 and my daughter Ava has been training there since 2023.  They are both year-round athletes that put a lot of stress demand on their bodies through their respective sports and consequently they put stress on their minds through school, sports, social life, etc.  With that said, when we found ITC we were drawn to not only the physical athletic training but also the mind/brain work and encompassing everything all into one.  Simply put, training the full body not only for competition but also the life of a teenage student-athlete and the preparation into adulthood.  There are many options in the market if you’re looking to just get bigger, faster, stronger but if you are like us, and you were looking for more than that, ITC is the place to come.
 
The coaching and training aspect of ITC is impeccable.  The details and focus of every session will ensure your athlete has an incredible workout that is tailored to them individually every time they visit.  The brain work and the messages they learn through the training has my kids walk out of ITC sessions a completely different person.  They are more upbeat, energetic, and motivated even though they just performed an intense work out for 45-90 minutes.
 
As a former athlete, it is very evident to see the physical results in their training.  As a parent, I see my children’s growth in their mindset and maturity.  I see them thinking about their futures in ways they never did before, I see their motivation in helping and be a part of the solution, and I see them wanting to serve something higher than themselves.  For me and my family, this means being a complete athlete which is what they receive from the team at ITC.
 
ITC has been a huge blessing for our whole family.  The lifelong friendships and relationships that we have developed and the tools that our children have received are priceless.  We are forever grateful and forever ITC!