welcome to flex

Where athletes strengthen their brain body connection that drives peak performance.
Through the Tri-Flex Method, we combine mental skills training, myofascial work, with recovery strategies to help every athlete perform better, recover faster, and stay in the game longer.

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FLEX YOUR MIND

  • Even the strongest athletes can lose their edge when the pressure hits—racing thoughts, frustration, or self-doubt can make the game feel faster than it really is. When your mind isn’t in sync with your body, performance suffers.

    That’s where mental training comes in. Using proven methods from sports psychology and mental performance coaching, this program helps you build mental strength, sharpen focus, and stay composed when it matters most.

    I’ll guide you through practical techniques to slow down the game, control your emotions, and make confident, high-impact decisions—even under intense pressure.

    You’ll learn how to reset quickly when things don’t go as planned, recover your focus mid-competition, and perform with calm, precision, and total confidence.

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FLEX YOUR MUSCLE

  • Many high-performing athletes train hard but still struggle with tightness, recurring soreness, or limited range of motion that holds them back from reaching peak performance. Over time, these imbalances can lead to inefficient movement, slower reaction time, and a higher risk of injury.

    Our program is built to solve that. It integrates specialized mobility training—including myofascial release and PNF stretching—to correct chronic muscle imbalances and uncover the “blind spots” that limit your movement potential. These methods go beyond traditional recovery routines, relieving deep tissue discomfort so you can train harder and bounce back faster.

    When myofascial release is paired with PNF stretching, the results multiply: improved range of motion, increased torque, and greater force production. Athletes not only move more freely, but also perform with more power, control, and precision.

    Rooted in strength and conditioning principles, this program blends evidence-based recovery and performance techniques to help athletes enhance efficiency, maintain long-term durability, and perform at their highest level—day after day.

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FLEX YOUR MIGHT

  • When the game speeds up, most athletes lose control—not because they lack skill, but because their nervous system takes over. That’s where tactical breathing comes in.

    This program teaches athletes how to use evidence-based breathing techniques to regulate their nervous system, shift from stress to control, and perform their best when it matters most. Tactical breathing bridges the gap between mental focus and physical execution—helping you stay composed under pressure, recover faster, and make sharper decisions in real time.

    By mastering your breath, you master your performance. Combine this mental training with targeted recovery methods like myofascial release and PNF stretching, and you build a body and mind that can handle anything—strong, calm, and unstoppable.

Services

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At FLEX, I help athletes master their mindset, recovery, and nutrition to perform with confidence and control. Explore tailored services by clicking
Book a free discovery call:

  • Build consistency, sharpen focus, and establish strong habits.
    This phase introduces athletes to FLEX YOUR MIND; Learn to establish habits of excellence that provide consistency with focus, confidence, emotional control and decision making. Ideal for those ready to elevate routines with structured performance coaching.

    Includes:

    • 1:1 Performance Coaching (bi-weekly)

    • Mental Training & Focus Coaching

    • Breathwork & Visualization Sessions

    (Entry point for athletes who want to train their mind)

  • Advance your mental strength to match your physical strength.

    This phase sharpens your mental tools while adding the recovery and mobility you need to perform as a game-ready athlete.

    Includes:

    • Everything in the 3-Month Package

    • Athlete Tune Up Recovery Coaching

    • Game Day Preparation Routines

    (Designed for athletes committed to consistent performance improvement and enhanced recovery.)

  • This phase is where consistency meets mastery to support ongoing improvement.

    Includes:

    • All services from previous packages

    • High-Impact Mental Performance Coaching

    • Advanced Breathwork & Visualization

    • Recovery & Mobility Optimization

    • Game Day Performance Blueprint

    • Checkpoints to Track Growth and Progress

    • Complimentary Invitation to Workshops or Private Clinics

    (Best for athletes ready to elevate both mind and body for sustained longevitiy)

FREE Guide for Parents

The Parent’s Guide to Raising a Mentally Strong Athlete

Give your athlete the mental edge they need—with simple, practical tools you can start using today.

Access Your Free Guide

Shop Through FLEX & Save

Create an account or use our exclusive FLEX dispensary link and get 15% off every Thorne product — automatically, every time you order.

No codes. No hassle. Just better recovery at a better price.

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MOBILITY TRAINING | FOOTBALL TRAINING | YOGA FOR ATHLETES | SPORTS PERFORMANCE TRAINING | BREATHWORK | D1 TRAINING | MINDSET COACH |

MOBILITY TRAINING | FOOTBALL TRAINING | YOGA FOR ATHLETES | SPORTS PERFORMANCE TRAINING | BREATHWORK | D1 TRAINING | MINDSET COACH |

MEET COACH MACKEY

A woman with blonde hair wearing headphones, a black and white striped shirt, sitting at a wooden desk, raising her hands in front of a computer screen, with sports memorabilia and framed photos on shelves behind her.

I’m Julie Mackey, a Human Performance Coach helping athletes train their mind and body to perform at their best—on and off the field.

Through my signature Tri-Flex Method, I integrate mental performance coaching, myofascial release, PNF stretching, and recovery-focused breathwork to unlock total athletic potential.

By combining science-based mindset training with advanced mobility and recovery techniques, I help athletes stay focused under pressure, move with power, and recover with purpose—building stronger, more resilient competitors from the inside out.

To learn more about my expertise

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testimonials

  • A young man wearing a white sports cap with a logo, a medal around his neck, a black patterned shirt, and khaki pants, standing outdoors on a grassy area with a building and trees in the background. The image features a graphic design with a black, teal, and yellow color scheme, text highlighting a testimonial about working with Coach Mackey, and the name Colin Kemp from Pekin Community High.
  • A black-and-white photo of a woman wearing a golf visor, holding a golf club near her face, with a thoughtful expression.
  • A woman in a light blue shirt, black shorts, and a white cap plays golf on a sunny day with green trees in the background.
  • Testimonial card about Julie Mackey on improving mobility and mental strength, with a photo of an Indianapolis Colts football player wearing a blue jersey with the number 14 on a football field.
  • Testimonial graphic for Julie Mackey, coach at Nazareth Academy, featuring a headshot of a man in sunglasses and headphones, alongside a positive review highlighted in yellow. The design uses black, blue, and yellow colors, with the quote praising Julie's coaching effectiveness.
  • A card featuring a testimonial about working with Julie Mackey, a fitness or coaching professional, with a background photo of a football game where a player in a Notre Dame uniform is seen on the field.
  • Close-up of Julie Mackey's face smiling, with a testimonial paragraph on a yellow background and her professional title and credentials listed on a black background.
  • Profile photo of Julie Mackey, a man wearing glasses and a green jacket, smiling at a wrestling event. Text on the left describes her as an exceptional mentor and wrestling coach who integrates yoga and mental performance into her coaching style, with a quote from Pat McCluskey, the wrestling head coach at Glenbard West High School.
  • A football player in a blue jersey and orange helmet looking to the side, with a black and teal graphic overlay featuring a testimonial about Julie Mackey's training program.
  • A testimonial card featuring Julie Mackey, a fitness expert specializing in Flex Yoga, with a picture of her smiling, wearing a denim jacket and white top, and a statement from Jennifer Wild, her parent, praising her athletic and coaching abilities.

Current clients include, but not limited to: Football  Golf  Wrestling Tennis  Baseball  Soccer  Lacrosse  Basketball  Hockey  Swimming  Triathlon Gymnastics  Softball  Volleyball  Track  Diving  Crew