Using an Apple Watch for footy training

What a watch is actually good for

A watch produces a great deal of data and most of it changes nothing. Two things are worth having.

• Recovery. How you slept, your heart rate variability (HRV) and your resting heart rate. One day’s HRV reading means very little. A sustained drop below your own normal is one of the earliest signs you are carrying fatigue — what HRV actually tells you.
• Load. What you have done this week against what you are used to. A big jump is the pattern associated with soft-tissue injuries — training load, explained.

Everything is compared against your own trailing baseline, never against somebody else’s numbers. The reasoning, and the papers behind it, are on the sources page.

What Train Smart does with it

An energy score. The app’s answer to a body-battery figure, built only from what the watch measured. Last night’s sleep is the biggest share — a little under half. Your HRV against your own baseline is about a third; if your watch reports no HRV, resting heart rate stands in for it. The rest is how much you have already spent today.

A readiness score that changes the session. The sleep and stress the watch measured are combined with how you say you feel and what you did yesterday. On a genuinely poor day the working sets in your session are reduced; on a good day they are left alone. If you tell the app you feel fine, that beats what the watch inferred.

A training-load warning. Your last seven days are tracked against your four-week average, and a sharp climb is flagged.

Which watches work

An Apple Watch works directly, through Apple Health. Garmin, WHOOP, Oura, Polar and COROS work too, once you switch on Apple Health sharing in their own app — Train Smart reads whatever they write there. A direct Garmin connection is built and is waiting on Garmin’s approval before it can be switched on.

No watch at all is fine. The readiness score works from your own check-in answers, and the program, the logging and the testing do not need one.

At training and on game day

A conditioning session can be sent to the Train Smart app on your Apple Watch, which runs the intervals on your wrist with a tap for each change of pace — so the phone can stay in the bag.

Check your club’s rules about wearing a watch in contact drills, and leave it off on game day.

Who sees it

What the app reads from Apple Health stays on your phone unless you switch on saving it to your account. Sharing it with a coach, with your team’s boards, or with the AI coach are three separate switches, and all three are off until you turn them on. Each kind of data — sleep, HRV, workouts and the rest — has its own permission. The detail is in the privacy policy.