Golf warm up: what it is measurably worth

Barely half of golfers do anything at all

54.3%Amateur golfers observed doing any warm-up at all, 1040 watched

Over three weeks in June 1999, two observers watched 1040 amateur golfers arrive at a private course, a public course and a driving range, and recorded what each did before hitting. Only 54.3 percent did anything that counted as preparation, with a confidence interval of 49.8 to 58.8. Of those, 88.7 percent took air swings on the tee, median two. Not one golfer did anything aerobic.

Stretching was rarer: 97 of the 1040 performed a dynamic stretch, 31 a static one, and three-quarters of those who prepared at all did only one type of activity. Fradkin, Finch and Sherman set their bar at three different activities and concluded that fewer than 3 percent had warmed up adequately. They also name the hole in an observational design: somebody may have stretched in the car park.

Dynamic, static, and nothing at all

1.9 m/sClub head speed, dynamic stretching over static, five-iron

Moran, McGrath, Marshall and Wallace ran all three conditions with a five-iron, measuring at 0, 5, 15 and 30 minutes after the stretch. Dynamic stretching produced club head speeds 1.9 m/s faster than static stretching and 1.7 m/s faster than no stretching, ball speeds 3.5 and 3.3 m/s faster, and swing paths straighter by 0.61 and 0.72 degrees. Face angle did not respond to anything.

Two findings get quoted less than the headline. Static stretching came out no different from doing nothing on every measure, so the paper argues for the dynamic work rather than against the stretch. Nor did the results depend on when the shots were struck: the advantage at half an hour matched the one at zero. The abstract does not report how many golfers were tested.

What a long static routine costs, and for how long

About 45 minutesTime for the clubhead-speed cost of static stretching to fade

Gergley tested 15 young male competitive golfers on two days: an active dynamic warm-up with clubs, and the same warm-up with 20 minutes of whole-body passive static stretching bolted on in front of it. The stretched sessions came out 4.19 percent down on clubhead speed and 5.62 percent down on distance, with consistent ball contact 16.34 percent worse. That is a large deliberate dose, not one hamstring stretch by the trolley.

A follow-up asked how long the penalty lasts, hitting three drives every 15 minutes for an hour. Clubhead speed was down 4.92 percent immediately, 2.59 percent at 15 minutes, 2.19 percent at 30, and no longer significantly down by 45. Distance and consistent contact were still significantly worse at 60 minutes, by 3.53 and 15.70 percent. Speed returns before the strike does.

The 12.8 percent everyone quotes

The study cited in almost every article on this is Fradkin, Sherman and Finch, 2004. Twenty male golfers were matched in pairs on age and handicap, ten per group, ages 23 to 64, handicaps 12 to 27. Clubhead speed was digitised from video shot at 125 frames per second as they hit a five-iron indoors. The exercise group gained 12.8 percent the first time they performed the warm-up, and 24.0 percent by week seven, after five weeks of doing it five times a week. Their controls barely moved.

Set 12.8 percent against everything above. No other trial has found a single warm-up worth more than a couple of percent, and the routine used here contained nine static stretches, which is what Gergley measured as a cost. The paper converts its gains into roughly four and seven strokes of handicap using a regression from earlier work, then states the golfers were never followed up, so whether any handicap fell is unknown. With a lowest handicap of 12, the authors add, better players might gain less.

Where the gain showed up, and where it did not

Tilley and Macfarlane gave 15 elite men off handicaps of 2 or better three warm-ups on separate days; twelve finished. Every arm opened with the same 15-minute block: ten swings with a weighted club, three shots each from sand wedge up to driver. Two arms added ten minutes of resistance work. Driving distance after the elastic-band version averaged 282.27 yards against 267.29 for the swing block alone, p = 0.042.

Maximum clubhead speed did not separate the three protocols, at p = 0.073, and neither did accuracy, at p = 0.470. Smash factor and consistent strike did. Fifteen yards arrived without a measurable change in speed, which points at where the ball met the face rather than at how hard anyone swung. Pebble Swing reads joint angles out of the frames and the backswing-to-downswing tempo ratio out of the motion, and neither of those is club speed.

None of these trials measured a score. Every figure came from shots hit into a net, along a range or under a launch monitor, on samples of twelve to twenty. Ehlert and Wilson went through 23 golf warm-up papers and found the same shape: dynamic warm-ups and resistance work tend to raise performance measures, static stretching is inferior, and the injury evidence is mixed and inconclusive. Your opening three holes are an extrapolation from that, not a measurement.