The first live Tidal Tank course

Learn Tidal Tank pitching from the coach who pioneered it.

Coaches everywhere use Tidal Tanks - in very different ways. Spend one day in Phoenix with Martijn Nijhoff, one of the pioneers of water-bag training in MLB player development, and learn his method in person.

Sat Dec 5 or Sun Dec 6, 2026One-day course - pick your day
Prime ReactionPhoenix AZ
30 seatsper day
Early bird
$299
until Nov 16 - then $399
Saturday Dec 5 - $299Sunday Dec 6 - $299
Sat Dec 5 or Sun Dec 6, 2026 - 30 seats per day
The day

What the day looks like

Same full-day course on Saturday Dec 5 and Sunday Dec 6, 2026 - pick the day that suits you. Theory first, then practice.

Martijn Nijhoff teaching a classroom session for the Pittsburgh Pirates
Morning - theory

The delivery, seen through stability

Martijn explains the pitching delivery through stability from a motor-control point of view. You learn to make a movement analysis of your pitcher, so you know which stability to train and how to train it with the Tidal Tank.

Three Tidal Tank drills with the working muscles shown: Classic on the shoulder, Sphere overhead, vest in the stride
Afternoon - practice

Water-bag drills on the mound

You run the Tidal Tank drills for the delivery with live pitchers, with the water as the constraint: design the drill, not the cue. Then you build your own session and Martijn gives you feedback on it.

Your coach for the day

Martijn Nijhoff

One of the pioneers of water-bag and Tidal Tank training in MLB player development. Martijn uses the moving water as a constraint, so pitchers find better movement solutions themselves.

Martijn Nijhoff
  • Skill acquisition consultant for the Pittsburgh Pirates for nine years
  • Leads the Dutch Olympic baseball high-performance centre - programs for the national and U18 teams
  • Lecturer at Fontys University of Applied Sciences
  • Teaches pitching and hitting courses in Japan, South Korea and Taiwan
  • Years of hands-on work with Tidal Tank water bags with pitchers
Hosted by Tidal Tank - founder Lupko Pot will be there.
From the source

Why we are hosting this course

Tidal Tanks are everywhere in pitching now. Walk into any facility and you will see them - used ten different ways. Some of those ways build better movers. Some just add weight.

The moving water is a constraint.

We have never run a live course. So we went to the coach with the most experience in water-based training: Martijn Nijhoff. Martijn is one of the pioneers of water bags and Tidal Tank in MLB player development. His idea is simple: the moving water is a constraint. It makes the pitcher's body find the right movement solution on its own, instead of being told what to do.

For the first time, that method is taught live, hands-on, in one room. If you coach with Tidal Tank, this is your chance to learn it from the source - and go home knowing how to get the most out of every rep.

The method

The water reacts before your body does

Every rep starts with the water. It shifts, the body feels it, and the muscles have to catch it - without a single cue from the coach. That is the constraint Martijn coaches with.

Water resists rotation, core muscles forced to activate
Core

The water resists rotation, so the core has to work

Water weight shifts to the arm side, lead leg forced to stabilize
Lead leg

The water shifts to the arm side, so the lead leg has to stabilize

Claw-back to lead-leg stability
Deceleration

Deceleration: claw-back into a stable lead leg

Schedule

The agenda

The course runs one full day and is the same on Saturday and Sunday.

Sat Dec 5 or Sun Dec 6, 2026

One-day course with Martijn Nijhoff

9:00Welcome
9:15-12:00Theory: the pitching delivery explained through stability and motor control - how to make a movement analysis - from analysis to a Tidal Tank training planMartijn
12:00-12:45Lunch
12:45-15:30Practice: hands-on Tidal Tank drills on the mound with live pitchers; build your own session and get feedbackMartijn
15:30Q&A + close

Agenda may change slightly.

Who it is for

  • Coaches and trainers who already use Tidal Tank and want to get the most out of it - or want to start the right way
  • Pitching coaches - high school, college and travel ball
  • Private pitching instructors
  • Strength and performance trainers
  • Facility owners who want a system they can use on Monday

What you will leave with

  • A skill-acquisition way to coach the delivery: cue less, design better drills
  • A Tidal Tank drill set for the delivery to run with your own pitchers
  • A movement-analysis method you can use with your own pitchers on Monday
  • Your own session plan, checked by Martijn
Book your day

Price + seats

Early bird$299until Nov 16
Regular$399after Nov 16

One-day course - pick Saturday Dec 5 or Sunday Dec 6, 2026 when you book. Only 30 seats per day. Sign-up closes when full.

Saturday Dec 5 - $299Sunday Dec 6 - $299
Avondale, Phoenix AZ

The venue

A full pitching lab: TrackMan, Proteus, Kinotek 3D motion capture, VALD ForceDecks + Dynamo and Edgertronic high-speed cameras.

Pitcher throwing at Prime Reaction, and the 3D motion capture screen tracking an athlete

Prime Reaction High Performance Center1050 N Fairway Dr. Suite D-109
Avondale, AZ 85323 (West Valley of Phoenix)

  • Nearest airport: Phoenix Sky Harbor (PHX)
Open in Google Maps
Questions

FAQ

What do I bring?

Training clothes and a notebook.

Is lunch included?

Yes - lunch is included.

Can I bring a pitcher?

No - this course is for coaches only.

Only 30 seats per day

Same full-day course on Saturday Dec 5 and Sunday Dec 6, 2026 - pick the day that suits you.

Saturday Dec 5 - $299Sunday Dec 6 - $299