Aerobic training in archers: Arisman 2019 study

Thirty archers from a club in Palembang, twenty men and ten women, were split into two groups of fifteen: one did six weeks of square training, three times a week, the other did not. Square training is a form of low-intensity aerobic work: a square fifty metres on a side is marked out, a group is placed at each corner and opposite sides alternate walking and light running, with the queue waiting its turn.

The measure is the twelve-minute run test, that is how far you cover running for twelve minutes. In the trained group the mean distance went from 1.88 to 2.32 kilometres, a gain of 0.44; in the control group from 1.89 to 1.90, which is ten metres. In the trained group the best went from 2.45 to 2.80 kilometres and the least trained from 1.44 to 1.74; in the control group the maximum and the minimum stayed identical, 2.48 and 1.46.

The author concludes that square training significantly increases the aerobic endurance of the club's archers. Nothing about shooting, however, is measured in the study: no score, no holding up over the last ends, no data from the bow at all.

The design is declared as experimental with a pre-test, a post-test and a control group. The study population is the thirty athletes of the club and the sample is the same thirty, so nothing was sampled: how people ended up in one group or the other is not explained, although simple random sampling is named. The two groups have the same composition, ten men and five women each.

The training lasted a month and a half with three sessions a week. Of the session itself we know only the shape of the exercise, taken from a coaching manual: a square fifty metres on a side, groups at the corners, alternating walking and light running, low intensity. The duration of the session, the number of laps, the pace, the heart rate and who led the training are not stated, and nothing at all is said about what the control group did during those same six weeks.

The measure, before and after, is the Cooper twelve-minute run test, in which you run for twelve minutes and the distance covered is recorded. The analysis reported is a paired samples t test, with a mean difference of 0.437 kilometres, a standard deviation of 0.077 and a t value of 11.12 with 29 degrees of freedom.

The most serious problem is the analysis. The only test reported is a paired one, comparing before and after within a group, and the mean difference it reports, 0.437 kilometres, is that of the trained group: the comparison between the two groups, on which the conclusion rests, was not carried out. The degrees of freedom, 29, match neither fifteen paired participants, which would give fourteen, nor a paired test on thirty.

The preliminary check does not add up either: the article declares the control group's distribution normal with a value of 0.017, immediately after writing that a value above 0.05 is required, and the two normality tables carry swapped headings. In the control group the longest and shortest distances are identical before and after, down to the second decimal, which across thirty measurements repeated six weeks apart is not easy to explain.

Then there is what is missing. Nobody was blinded to anything, and the Cooper test depends on how hard a person decides to push. The control group did nothing that is documented, so the comparison does not separate the exercise on offer from training of any kind. Above all, no outcome concerns shooting: the method announces that endurance in archery will also be looked at, but that figure never appears in the results.

For someone who shoots, this study says only one thing, and it says it indirectly: six weeks of walking and light running around a square, three times a week, were followed by four hundred metres more in the twelve-minute run test, in a group of club archers starting from low values. That is a large gain for low-intensity work, and in a group that started below population averages.

What it does not say is whether any of this reaches the target. In the registry it counts as evidence on the general physical preparation of archers, not on the score, on holding up over a competition day or on steadiness over the last ends, which are the questions for which breathing ought to matter. Anyone wanting to argue that aerobic endurance helps shooting has to lean on something else: the bow does not appear here, except in the name of the club.