Drilling and Games

This site holds two practice libraries — a set of drills and a set of positional games — and they do different work. Its own data even labels them that way: drills are closed-loop motor primitives, games are open-loop constrained rounds. This page is the honest read of when each one earns its place, because the answer is not “only games.”

Closed loop and open loop

A closed-loop rep repeats a fixed motion against a partner who feeds a fixed response — a flow drill, a cooperative entry, a movement done on the air. An open-loop rep solves a problem against a partner who is genuinely resisting and varying, with the solution emerging fresh each time. The two train different things: the first builds a shape, the second builds the reading and adapting that decides whether the shape ever lands.

What the science says about drilling

The case against heavy cooperative drilling is real and follows from two earlier pages. By representative learning design, a cooperative rep has low informational fidelity — the resisting partner whose responses a grappler must read is absent, so the perception half of the skill goes untrained. By repetition without repetition, grooving one identical solution builds something brittle, because real exchanges never repeat. A grappler who only drills tends to look sharp on the air and fold on contact. That is the failure mode the ecological approach is reacting to, and it is common enough to take seriously.

Where drilling still earns its place

It does not follow that drilling is worthless, and claiming so would overstate the science. Cooperative repetition does a few jobs well:

• Safety skills. Breakfalls, the tap, escaping the worst of a position — these should be near-automatic before live pressure, and grooving them is the fastest way there.
• A foothold on a new shape. A movement a beginner cannot yet stumble into is reachable through a few cooperative reps, which then give the games something to pressure.
• Recovery and volume. Light, cooperative work has a place in managing load, rehab, and warm-up.

The honest position is that closed-loop reps build a base the open-loop games then make functional — and that the games should carry the larger and growing share of the work as a grappler develops.

How to blend them

The mix shifts by stage. A beginner needs more scaffolding: safety drills, a few cooperative reps of a shape, then heavily constrained games that keep the problem small. A developed grappler lives in open games and drills sparingly, to patch a specific gap. The curriculum’s drilling guide lays out one defensible blend — cooperative, then specific resistance, then live — and the curriculum as scaffolding page explains why that is a starting structure to adapt rather than a fixed law. The constraints-led approach is how a coach builds the open-loop half on purpose. Use both; weight toward the games; let the room tell you the ratio.

References

• Davids, K., Button, C., & Bennett, S. (2008). Dynamics of Skill Acquisition: A Constraints-Led Approach. On variability, specificity, and the limits of decomposed practice.
• The variability-of-practice and contextual-interference literatures (motor-learning reviews, Schmidt & Lee) — why varied practice retains and transfers better despite worse in-session performance.
• Gray, R. (2021). How We Learn to Move, and the Perception & Action podcast — a candid practitioner synthesis of where each practice mode helps.