For tennis athletes

Fitness training, adapted every day.

Strength, power and conditioning, planned around each athlete's court time, matches and tournaments.

Start trainingHow it works
An athlete setting up over a loaded barbell.

Other apps hand athletes a programme. KAYN writes the session, every day.

What KAYN does that others don't

Written for the dayEach session is written that morning from the check-in — never pulled from a template.
Inside the fitness coach's methodThe coach's training method sets the frame. The AI engine applies it to every session.
Built around the courtCourt hours, matches and tournaments decide where the heavy work goes.

How it works. Three things go in. One session comes out.

Training protocolThe fitness coach's method (optional)
The athletePhysical attributes, playing style, training history
TodayReadiness, time, equipment, surface, court load

The AI engine

Working inside a database of sport science.

Nothing is pulled from a template.

Today's session

Personalised to the athlete and to today.

With the reasons stated.

Every finished session goes back in. The weights lifted and how it felt set the next starting point.

For the athlete. No templates. Every session written for them.

Body, mind, sleep and soreness, plus where they train and how long they have. Tired or sore? The AI engine lightens the session.

A demo clip for every movement. The weights come from the athlete's own history. One tap logs each set.

Court hours, surface and season. The heavy work stays away from matches, and the training block is timed for the tournaments booked.

More strength, power, conditioning or mobility? The athlete says so, and it is built in.

The daily check-in.
A movement with its demo clip and weight range.
The Plan tab: phase and this week's days.
Settings that shape the sessions.

For the fitness coach. Already working with one? Great. We want their input too.

Training methods typed in or uploaded once, with how closely to follow them — from strict to guiding. The AI engine applies them to every session.

Each athlete's week, court load, assessments and progress, in one place.

Who trained, who didn't, and a message waiting — seen at a glance. Less time on plans, more with the athletes.

The Coaching approach page with a Strict to Guiding slider.
An athlete's page on the dashboard.
The dashboard's Today page.

The record. The training, the effort and the results, in one place.

Every session

Four facts, kept.

Captured while the athlete trains, not reported afterwards.

PrescribedThe session the AI engine wrote, exercise by exercise.
DoneSets, reps and the weight actually used.
EffortHow hard it felt, and how they were that morning.
MeasuredStrength gained and match results in the weeks after.

Beyond tennis

Tennis is just the beginning.

One AI engine, built to adapt training to any sport. Each sport brings its own demands; the engine stays the same.

Start today

The first session is one check-in away.

Runs in the browser on a phone — nothing to install. Fitness coaches and clubs: we set the club up.

Start trainingGet in touch
QR code to app.kaynsystems.comOn a computer? Scan with
a phone camera.

18 and over. Under 18? Train with KAYN through a club, with a coach.

Get in touch

We reply by email, usually within a day.