A Constraint Needs a Job

You’ve found a landing spot that works. Your last few boules have finished where you wanted them. Someone moves the markers closer together.

“Too easy. Try that.”

It is harder. But is landing more accurately what you need to practise?

What is a constraint?

A constraint is a rule or condition that shapes the shot you have to play. The distance, the terrain and the boules already in the way all do that. In practice, you can change one of those conditions to work on something specific.

Put a spare boule on your usual landing spot. You still want to finish in the same place near the jack, but now you need another way to get there. You might land earlier, play with more height or choose another line.

The idea is to practise finding another way to play the point. Make sure there’s somewhere else you can reasonably land, and give yourself time to work it out.

In this example:

• Target: “Finish in this area in front of the jack.” That tells you what success looks like.
• Constraint: “Your usual landing spot is blocked.” You have to find another way to play it.
• Pressure: “This boule decides the practice game.” You have something at stake.

These can overlap. A smaller target also asks more of your accuracy. A score might just help you keep track, or it might add pressure because you care about beating it. Having one boule left doesn’t necessarily mean you’ll feel under pressure.

Choose your target with Give the Drill a Target Before You Throw, then decide what you want to change around it.

What do you need to practise?

Make the landing area smaller to work on accuracy. Sometimes you only have a small landing spot available. But if several nearby spots would still give you a good point, there may be no need to make the target tiny. Keep checking where the boule finishes too, as in The Landing Spot.

Give yourself one boule, with no second attempt. Read the situation, choose your shot and play it. Then move on, even if you know exactly what you’d change. Try One Boule, One Chance when you want to practise making that first boule count.

Change the distance to practise judging the weight. Play at seven metres, then nine, then eight. You have to judge each shot again. But if you’re still working out the weight at seven metres, give yourself a few more attempts there before moving on.

Set yourself a score you care about beating. Keep the shot familiar and build up the pressure gradually. Notice whether you still choose your landing spot and follow your routine, or start rushing because you need the point. Afterwards, ask yourself what changed.

When should you change it?

If you can choose a landing spot, see what happened and make a useful adjustment, try changing one thing. If each miss leaves you guessing about what to do next, make the task easier.

You don’t need to make it harder every session. Give yourself a little longer on the shot when you’re still working it out.

And don’t judge a change only by how well you throw today. Come back a few days later and see what you can still do.

Before changing the drill, ask yourself:

• What am I trying to improve?
• What will this ask me to do differently?
• What will I watch for after each throw?
• Can I still tell why one attempt worked better than another?
• Is this something I might need in a game?
• When will I remove or change it?

With a blocked landing spot, you might say: “I want to find another way to point. I’ll watch where the boule lands and how it runs from there. If I can’t find a way to play it, I’ll make more room.”

Try it: Change One Thing

Take your boules, a jack and four flat markers. Allow about fifteen minutes.

In this version, you’re checking whether a smaller landing area helps you finish where you wanted. You’ll count both the landing and the finish, so you can see whether one helps the other.

Put the jack at seven or eight metres. Choose an area in front of it, within about 30 centimetres, where you want your boules to finish. Keep that finishing area the same throughout.

Read the terrain and choose the landing spot you would use for that point.

Place the markers just outside the corners of a landing area about 50 centimetres wide and 30 centimetres from front to back. Leave them far enough outside the area that they won’t interfere with the boule. Mark their starting positions and the jack’s position so you can put them back.

1. Point six boules towards the jack, using your chosen landing spot. Try to land each boule in the marked area so it rolls up towards the jack. Keep two separate counts: how many land in the marked area, and how many finish in your chosen area in front of the jack.

   After each throw, check where the boule landed and finished, then pick it up. Put the jack back on its mark if it moved. Do this throughout the drill.

2. Make the landing area narrower. Move the left and right edges in by about 10 centimetres each, so the area is now about 30 centimetres wide. Leave the front and back where they were. Point six more boules from the same circle, aiming for the same finishing area. Keep the two counts again.

3. Put the markers back in their starting positions. Point another six boules and keep both counts. Compare your first and final sets, when the landing area was the same size. Did more boules land where you intended? Did more also finish in your chosen area in front of the jack?

Write down what the smaller landing area made you notice, whether it helped when you opened the area up again, and what you’ll try next time.

For example: “I hit the landing area more often, but still finished long. Next time I’ll pay more attention to how far the boule runs.”

If your final six were better, that is worth following up. Come back another day and see whether you can still do it, including on a different shot. One good set cannot tell you that.

Another day, try changing the distance, the line of play or the number of attempts. Or add a score you care about beating. Change one thing at a time.

Research

These papers look at other sports. They’ve helped me think about how to set up practice, but they haven’t tested this petanque drill.

Read the study findings, limitations and full references

Different constraints do different jobs. Across 40 football studies, changing the constraints affected different demands on players, including movement, physical effort, technique and tactics. No single change consistently recreated all the demands of a match. Most studies looked at what happened straight away, rather than whether players learnt something that lasted.

Chootsungnoen, P., Sonchan, W., Chainok, P., & Leenoi, P. (2026). Effects of task constraint manipulation on physical, physiological and technical–tactical demands of small-sided games in soccer: A systematic review. Journal of Functional Morphology and Kinesiology, 11(3), 354. https://doi.org/10.3390/jfmk11030354

Progression based on performance. This study randomly assigned 71 beginners to repeated-distance blocks, randomly mixed distances, two adaptive schedules or control. The adaptive schedules changed practice order according to accuracy. Tested two days later, both adaptive groups beat random practice and control at the practised distances; neither significantly beat blocked practice. At new distances, the 44% threshold group had the highest average, but again did not significantly beat blocked practice. The pressure test found no group differences. The percentage describes a scoring threshold, not a recommended rate of missed boules. These comparisons follow the Results section; the abstract makes a broader transfer claim.

Taghizadeh, H., Fazeli, D., & Nazemzadegan, G. (2026). Effects of adaptive error-threshold practice on soccer instep kick learning. Scientific Reports, 16, 26922. https://doi.org/10.1038/s41598-026-57684-y

Practice results and later performance can differ. In 48 novice adolescents, repeating a distance was most accurate during three days of basketball practice. Three days later, randomly varied distances and deliberately varied shooting movements (differential learning) beat control; differential learning also beat blocked practice. Under induced pressure, differential learning beat blocked and control. This was a small, short basketball study. Only the original abstract was accessible, so this is not a full-methods appraisal.

Taghizadeh, H., Parvizi, M. J., Roostaei, A., Jabbari, F., & Fazeli, D. (2026). Challenge under pressure contextual interference or differential learning. Research Quarterly for Exercise and Sport. Advance online publication. https://doi.org/10.1080/02701367.2026.2686249

Adaptation as a way of thinking about skill. This handball paper explains skill through the interaction between the player, the task and the surroundings. Its idea of “repetition without repetition” is about finding ways to complete the task without making exactly the same movement every time. It offers a way of thinking about practice, rather than evidence that one coaching approach is better than another.

Bjørndal, C. T., & O’Sullivan, M. (2026). Performing is adapting: An ecological dynamics framework for skill learning in development in handball. Frontiers in Sports and Active Living, 8, 1869713. https://doi.org/10.3389/fspor.2026.1869713

Keep the information the shot needs. This foundational paper argues that practice should preserve the information players use to guide their actions in competition.

Pinder, R. A., Davids, K., Renshaw, I., & Araújo, D. (2011). Representative learning design and functionality of research and practice in sport. Journal of Sport and Exercise Psychology, 33(1), 146–155. https://doi.org/10.1123/jsep.33.1.146

Introduce pressure deliberately. The ESSA position statement recommends helping players develop ways to handle pressure before introducing it gradually. Explain what the exercise is for, watch how players respond and talk it through afterwards. It also advises against using pressure training too often or while players are learning new skills. This is guidance, not a petanque trial.

Schweickle, M. J., Appaneal, R. N., Jackman, P. C., Minahan, C. L., Moyle, G. M., Pickering, C., Stewart, D., Vella, S. A., & Swann, C. (2026). Performance under pressure in sport: A position statement from Exercise and Sports Science Australia (ESSA). Sports Medicine, 56(8), 1851–1867. https://doi.org/10.1007/s40279-026-02472-x