Underwater Performance Training · Chicago

Train calm.
Master your breath.

Chicago's home for elite underwater training. We build breath control, composure under pressure, and nervous-system regulation for everyone from weekend athletes to first responders, pro teams, and tactical operators.

UIC
Natatorium · 901 W Roosevelt
12-foot depth · Olympic facility
SUN
Weekly Class · 1:00 PM Sharp
All levels · No experience required
B2B
Custom Programs
Agencies · Teams · Corporate
As featured in
ESPN MEN'S HEALTH OUTSIDE USA TODAY WSJ GQ SHARK TANK

Two ways to go deeper.

Whether you're stepping into the pool for the first time or building a training program for your unit, team, or company — there's a path here.

Individuals

Sunday Group Class

Weekly coached sessions at the UIC Natatorium. Build CO₂ tolerance, breath-hold capacity, and water confidence in a supportive group environment. Scalable for all levels.

  • 90-minute coached session
  • Breathwork, swims, and underwater drills
  • Goggles and orientation provided
  • HSA / FSA eligible through TrueMed
Reserve Your Spot
Organizations

Tactical & Team Programs

Private programming designed for first-responder units, professional and collegiate athletic staff, dive teams, and corporate performance groups. Built around your mission, scheduled around your shift.

  • On-site at your facility or at UIC
  • Custom curriculum and measurable outcomes
  • Documented training records
  • Multi-session packages and pilots available
See Programs →
Class Booking

Reserve your spot.

See the live class schedule and book directly. Sundays at the UIC Natatorium plus added sessions throughout the week. New to DEF? Look for any class tagged "All Levels."

Calendar not loading? Open it in a new tab →
For Agencies, Teams & Organizations

Built for the people who can't afford to panic.

The Deepend methodology was developed by U.S. Military special operators and is informed by selection-pipeline training. We adapt it for the professional environments where breath, composure, and decision-making under stress actually matter.

01 / TACTICAL

First-Responder Aquatic Conditioning

Underwater confidence, water-survival skill-building, and stress inoculation programming for police, fire, rescue, and tactical units.

CPD · CFD · Marine Units · SWAT
02 / PERFORMANCE

Athletic Recovery & Breath Performance

Off-season conditioning, in-season recovery, and breath-capacity training for professional and collegiate rosters. Low-impact, high-yield work.

Pro Teams · NCAA · Olympic Hopefuls
03 / DIVE & RESCUE

Operational Dive Readiness

Programming for working divers, aquarist staff, and lifeguard programs that need consistent underwater fitness and confidence-building.

Aquariums · Park Districts · Commercial Dive
04 / CORPORATE

Executive Performance & Team Offsites

Private sessions for executive teams, leadership offsites, and corporate wellness programs. Stress regulation that translates into real-world decision-making.

Wellness Programs · Leadership Teams
Meet Your Coaches

The team in the deep end.

Competitive swimmers, certified divers, and underwater athletes who've put in the hours. Every coach is trained in the full DEF methodology and committed to building water confidence from the very first session.

"The water doesn't care how strong you are. It cares how calm you are. That's what we train."
Matt Michalak
Senior Instructor

Matt Michalak

Founder of DEF Chicago and a certified free diver and scuba diver. Matt brings a taste of the ocean to the Midwest, leading every Sunday session at the UIC Natatorium with a focus on breath mastery, composure, and water confidence for athletes of every level.

Mel Robert
Instructor

Mel Robert

Competitive swimmer and CrossFit national-level competitor. Mel pairs elite conditioning with technical pool work, helping students build CO₂ tolerance, capacity, and the kind of relentless composure that wins both in the water and out.

Laura Soto
Instructor

Laura Soto

Lifelong competitive swimmer and underwater enthusiast. Laura coaches with the calm authority of someone who has lived in the pool — patient with first-timers, sharp with seasoned athletes, and obsessed with the technique that turns hesitation into confidence.

Augie Vullo
Instructor

Augie Vullo

Active United States Coast Guard, open-water competitor, and underwater enthusiast. Augie brings real-world tactical aquatic experience to every session — the kind of training that prepares people not just to perform in the water, but to respond when it matters.

Ed Dolezal
Instructor

Ed Dolezal

Competitive swimmer with deep Illinois roots and a longtime love of the water. Ed pairs the discipline of high-level training with a coach's patience, helping athletes of every level get more comfortable, more efficient, and more confident underwater.

Get Started

Bring your team into the deep end.

Whether you're booking your first Sunday class or scoping a multi-session program for your agency, drop us a line. We'll respond within one business day.

Pool Location
UIC Natatorium
901 W Roosevelt Rd, Chicago IL 60608
Class Time
Sundays · 1:00 PM Sharp
Instagram

Inquiry Form

Tell us a bit about your goals. The more detail, the faster we can route your request to the right person.