The 45-Minute Practice Rule (and Why Your 2-Hour Range Session Makes You Worse)

A student came to me a couple of springs ago genuinely frustrated, and he had every right to be. He was practicing more than almost anyone I coach — two hours, three nights a week, a large bucket each time. He'd built a beautiful little rhythm out there: 7-iron, same target, rake another ball over, go again. By the end of a session he was flushing it.

His handicap hadn't moved in two years.

He assumed he was doing the right thing badly. He wasn't. He was doing a different thing well. Six hours a week, and almost all of it was spent getting better at the one skill golf never asks you to perform: hitting the same shot, with the same club, to the same target, over and over, with a fresh ball already sitting there.

That's the part nobody tells you. Practice doesn't just have a quantity. It has a shape — and the shape decides whether anything you build survives the drive to the course.

Feeling good during practice is not the same as learning

This is the single most useful idea in motor learning, and it's a little uncomfortable when it lands: how well you're hitting it during a session is a terrible indicator of how much you're actually learning. Those two things can move in opposite directions, and often do.

The study everyone in this field points back to is Shea and Morgan's, published in 1979. They had people learn three versions of a movement task — knocking down barriers in different orders as fast as they could. One group practiced blocked: all the reps of pattern one, then all of pattern two, then pattern three. The other group practiced random: patterns jumbled, never the same one twice in a row.

During practice, the blocked group looked better. Cleaner, faster, more consistent — exactly what you'd expect, and exactly what my student was experiencing on his 40th consecutive 7-iron.

Then they came back for retention and transfer tests. The order flipped. The random group — the group that had looked worse all the way through — retained more and transferred it better. That result has been replicated for nearly fifty years now. It has a name, the contextual interference effect, and Robert Bjork later gave the broader principle the phrase I use with students constantly: desirable difficulties. Some struggle in practice isn't a sign you're doing it wrong. It's the thing doing the work.

How strong is the effect, honestly?

Here's where I'm going to do something most golf content won't, which is tell you the part that cuts against my own argument.

A 2024 systematic review and meta-analysis in Scientific Reports (Czyż, Wójcik, Solarská and Kiper) pooled 54 studies covering 2,068 participants. Overall, high contextual interference — the random stuff — came out with a medium benefit for retention: a standardized mean difference of 0.63. Solid, real, statistically clear.

But split it by setting and it gets interesting. In laboratory studies the effect was large (0.92). In applied settings — real sports, real skills, out in the world — the pooled effect was small (0.23) and not statistically significant.

So no, I'm not going to stand here and tell you random practice is a magic switch that will drop three shots by October. The honest read of that evidence is narrower and more useful: the mechanism is well established, and getting it to pay off in a real sport depends entirely on how you actually run the session. Sprinkling a bit of variety into an otherwise aimless bucket isn't the intervention. Structure is.

Which brings me to the number in the title, and a second bit of honesty: there's no study that proves 45 minutes. It's not a magic constant, and anyone selling it to you as one is making it up. Forty-five minutes is simply the shortest block I've found, over 4,000-plus lessons and fittings, that fits all three jobs a practice session has to do — while still being short enough that most golfers can hold real focus for the whole thing.

Why the long session specifically hurts

Two things go wrong once you're past the first stretch of a big bucket.

The first is that raking balls quietly removes the hardest part of golf. On the course, every shot requires you to walk up cold, read a new situation, pick a club, and retrieve the skill from scratch. On the mat, the previous swing is still loaded in memory and there's already a ball sitting there. You never have to retrieve anything — so you never practice retrieving, which is the exact skill Saturday is testing.

The second is focus, and I want to be precise about it, because it isn't the tired old "diminishing returns" line. Practice doesn't stop paying at minute 46. The issue is that the quality of your attention is itself one of the things you're training — it's a skill, not a fuel tank — and most golfers can't hold it much past 45 minutes. When it slips it doesn't announce itself. You just start missing a bit more, and then you start making changes to fix misses that came from wandering attention rather than from your swing. That's the real danger of the long session: not wasted time, but an hour of quietly rehearsing the wrong thing. The back half of a two-hour bucket is usually a golfer grooving a pattern they'd never have chosen on purpose.

Fitts and Posner described skill acquisition back in 1967 as moving through stages — an effortful, thinking-heavy stage first, then progressively more automatic. Long, comfortable, repetitive sessions are very good at keeping you parked in the early stage, on one club, forever. The golfer who's brilliant on the range and lost on the first tee isn't a mystery. He's a training-design outcome.

What 45 structured minutes looks like

Three blocks of fifteen, each with a different job. This is the skeleton of the plan I hand my own students.

• 0–15, Build (blocked). One focus, one club, controlled reps. Yes — blocked practice, deliberately. This is where a technical change gets started. The mistake isn't using it; the mistake is that most golfers never leave it.
• 15–30, Mix (random). Different club, different target, different shot, every single ball. Repeat nothing twice in a row. Your strike quality will drop compared to the first block. That's the desirable difficulty doing its job.
• 30–45, Transfer (pressure). One ball per shot, a score on the line, consequences. Nine up-and-downs from nine lies. Ten drivers to alternating targets. Write the number down so the next session has something to beat.

Two rules run underneath all three blocks. One focus per session — and pick it from your ball flight, not your feelings: where the ball starts is mostly your face, how it curves is the face-to-path relationship. (If you want the two-minute version of that diagnosis, it's right here.)

And use external cues only. Aim at something outside your body — "start it right of that flag," "brush the grass a card's width past the line" — rather than steering a body part. Gabriele Wulf and Rebecca Lewthwaite's OPTIMAL theory of motor learning, published in Psychonomic Bulletin & Review in 2016, puts an external focus of attention among the small handful of factors that reliably improve motor learning. It costs nothing to switch and it changes what your practice reps are worth.

It's supposed to feel worse

I'll tell you now what my student told me after his first two weeks: he hated it. His mix block was ugly. He'd gone from flushing 40 in a row to shanking a wedge after a driver, and it felt like going backwards.

The golfer who leaves the range feeling great and the golfer who leaves the range having learned something are frequently not the same person. If your practice always feels good, it's probably measuring your comfort rather than building your skill.

Six weeks later he wasn't a different ball-striker. He was something better: roughly the same ball-striker on the course as on the range. That gap closing is what actually shows up on a scorecard, and it's the gap almost nobody trains.

So cut the session in half. Give the second half a job. And judge a practice session not by how it felt on the mat, but by what still works on the first tee four days later.