The engine

Act. Measure. Learn.

Most fitness AI writes messages and forgets them. PACT closes the loop. Every action is tied to what happened next, and that record is what makes the next action better.

The loop

Five steps, running for every athlete, every day.

01SignalsSleep, training load, calendar, logs and replies.

02DecideWhat to do, when, and how hard, inside the coach's rules.

03ActA PAX message, a plan adjustment or an escalation to the coach.

04MeasureWhat happened at 4 hours, 24 hours and 72 hours.

05LearnThe outcome updates the PACT Brain. The next decision is better.

The intervention log

Every action, with its context and its result.

This is the record that turns coaching instinct into evidence. Coaches see it for their roster. PACT learns from it across all of them.

Example entries, for illustration.
Athlete state	Action	4h	24h	72h
Poor sleep, heavy session due	Session trimmed to 35 min, message at 7am	Replied	Session done	Back on full plan
2 days silent, no logs	Curious check-in, no plan mention	No reply	Replied, work trip	Travel plan accepted
3rd missed session this week	Escalated to coach with context	Coach called	Session done	2 of 2 done

The PACT Brain

Fitness intelligence that comes from outcomes, not opinions.

A model can write a nice message. It can't know whether that message gets this athlete to the gym. The PACT Brain is built from what actually happens after every real intervention, and it grows with every athlete.

Which kind of nudge worksA question, a plan change or a call from the coach, per athlete.

When it landsThe moments each athlete actually responds to.

How hard to pushChallenge matched to recovery, mood and the week ahead.

Early warning signsThe patterns that come before an athlete drops off.

Guardrails

Powerful, and on a short lead.

Coach rules come first

The engine can only act inside the limits each coach sets.

Checked before it sends

Every message passes safety and tone checks before an athlete sees it.

Humans for health

Injury, illness and wellbeing concerns go to the coach, every time.

Instant off switch

Per athlete, per coach, or across the platform.

Full audit trail

Every decision is logged with the signals that led to it.

Model-agnostic

The best AI model for each task, with no lock-in to any one provider.

Put the engine to work on your roster.

Founding coaches help shape what the PACT Brain learns first.

Apply for founding access