Breakfall Programme — Twelve Weeks, Derived From Measurements

What this programme is for

The article Breakfalls in Seven Systems assembles an unusually clear body of measurement for a martial art. This programme is the practical conclusion from it: a training plan in which every prescription points back to a finding.

That says at once what it is not. A programme is a recommendation, not a finding — it says what someone should do, and that cannot be measured the way an acceleration can. Where a figure below comes from a study, it is named. Everything else is reasoned choice, and it says so.

And the most important sentence first: breakfalls are the one area where the price of an unnoticed error is immediately the head. This text serves to structure your own practice and as an argument against a coach who throws too early. Not for learning alone from a page.

The two findings that make this programme unusual

Most breakfall instructions start with “chin to chest” and soon begin throwing. This programme does both differently, for a reason.

The difference sits below the head

The systematic review by Lockhart and colleagues (2022, 16 studies, 158 judoka) found no significant difference in neck flexion between beginners and the experienced. The experienced extend the knee faster and further and keep the trunk straighter; beginners flex hip, knee and trunk more — and it is precisely that flexion that goes with the higher readings at the head.

Bringing the chin to the chest is therefore necessary, but it is not what produces the numbers. Hence this programme has a dedicated core exercise for the body line, with its own criterion.

Throwing comes last, not first

Kamitani and colleagues (2013) analysed the injury reports of the All Japan Judo Federation for 2003–2010: 72 catastrophic injuries, 30 of them to the head — 27 of the 30 in adolescents under twenty. Over the longer span, the Japanese judo accident victims’ association counted 118 deaths in school judo between 1983 and 2011, disproportionately first-year students.

The risk therefore lies not in the harshness of the sport but in the window between the first throw received and the first working breakfall. This programme closes that window by inverting the usual order: for the first eight weeks, nobody throws.

The justification in one table

	Rotational acceleration at the head
with clean ukemi	679 ± 174 rad/s²
concussion limit	4500 rad/s²
without ukemi (dummy head, occiput)	5081 ± 692 rad/s²

Murayama et al. 2020; collated in Lockhart et al. 2022.

The threshold lies exactly between the two cases. That is why breakfalls get twelve weeks here, and a permanent place afterwards.

Phase 1 · Weeks 1–4 — ground level

Rule: the head never starts higher than a squat.

Exercise	Volume	Criterion
Trunk rock — on the back, knees in, rock back and forth	2 × 10	the occiput never touches the floor
Ushiro-ukemi from sitting — roll back, both hands slap	2 × 8	hands land with the upper back, not after it
Leg-extension drill — as above, but the upper leg extends upward at impact	2 × 8	knee visibly straight, trunk long
Yoko-ukemi from sitting (from week 2)	2 × 6 per side	one side lands, not the back

The leg-extension drill is the core exercise. It is the Lockhart finding turned into practice, and it is missing from most curricula.

Commonest fault: the practitioner curls up at impact — hip and knee flex, trunk rounds. That is exactly the pattern with the higher readings at the head. It is a protective reflex and cannot be cued away; the answer is less height and less volume, not more admonition.

On to phase 2 when: twenty ushiro-ukemi without head contact · knee straight in the leg-extension drill in eight of ten attempts · yoko-ukemi equal on both sides · no neck stiffness the following day (if it appears, the head is being held rather than carried — extend phase 1).

Phase 2 · Weeks 5–8 — from standing, and a second track

Rule: still nobody throws. The height comes from your own movement.

Exercise	Volume	Criterion
Ushiro-ukemi from a squat (w5–6), then from standing (w7–8)	2 × 8	the squat step is not optional
Yoko-ukemi from standing	2 × 6 per side	no propping with the free hand
Mae-ukemi, forward roll diagonally across the shoulder	2 × 6 per side	head touches nothing; the roll runs beside the spine
Hard-surface track (from week 7): the same roll, with no slap at all, on a thin mat	1 × 5 per side	the roll is silent

The second track follows from the parkour control case in the comparison article: where the ground is hard, people roll and slap nothing — the arm protects nothing there, it breaks. Mat track and hard-surface track are therefore not mixed, and while building, the hard-surface track never runs on concrete. The intermediate step over a thin mat is where most people go too fast.

On to phase 3 when: ushiro and yoko from standing without propping · mae-ukemi silent and on both sides · the leg-extension drill holds from standing too (this criterion is missed most often, because height brings the protective reflex back) · two weeks of hard-surface work without bruising.

Phase 3 · Weeks 9–12 — now you get thrown

Rule, and it is the most important in the programme: the thrower is not stronger than the person thrown. That is the direct consequence of the injury figures — those hurt are the ones who cannot yet do ukemi and are training with stronger partners.

Week	Throw	Why here
9	O-goshi / koshi-guruma	thrower holds, the fall is guided, height moderate
10	Tai-otoshi	lower head acceleration than osoto-gari
11	Ippon-seoi-nage	higher, but the arm stays held
12	Osoto-gari	last — see below

Osoto-gari comes last, although it is technically simple and appears early in many curricula. The reason: it puts the thrown person straight back, with no path for the head to avoid the floor; the angular acceleration is higher than for ippon-seoi-nage or tai-otoshi, and it sits high in the Japanese accident statistics.

Three hard rules go with it. The thrower holds to the end (a released throw is a different task). Ten throws per session, no more — fatigued, the protective reflex returns. Stop if the knee flexes on three consecutive falls — do not admonish, end the session.

It does not stop afterwards

The comparison article draws from the injury figures the conclusion that breakfalls belong in the warm-up rather than in the beginners’ syllabus: the risk window only closes if falling is practised for years.

Permanently: every session in the warm-up, 10 ushiro, 6 yoko per side, 6 mae per side — barely three minutes. Once a month, five rolls per side on the hard-surface track. Once a quarter, the leg-extension drill as an exercise in its own right, because it is the first thing to decay.

Stopping, and seeing a doctor

At any of the following, the session ends and a doctor is consulted. This is not a caution boilerplate: the Japanese fatalities are almost all acute subdural haematomas.

Head impact, even a light one, with or without brief dazing
Headache, nausea, visual disturbance or drowsiness after a session
Tingling, numbness or loss of strength in the arms or hands
Neck pain with restricted rotation

After a head impact there is no more throwing that day. Not even if it feels fine.

What here is choice and not finding

To keep the line clean:

The number twelve is a customary block length, not a surveyed quantity. Meet the phase 2 criteria after eight weeks and you move on; fail to after sixteen and you stay.
All repetition counts are chosen, not measured. No study sets training volumes for ukemi against one another. They are sized to fit a warm-up and to produce no fatigue — because fatigued people fall worse.
The order of throws follows the findings; distributing them over exactly four weeks is choice.
And the programme itself is untested. No study sets ukemi programmes against one another. It is derived from measurements — more than most training plans can claim, but not a demonstration of effectiveness.

A fuller version with weekly plans, a fault catalogue and detailed criteria is in preparation as a companion.

Breakfalls in Seven Systems
Judo
Aikidō
Jūjutsu
Brazilian Jiu-Jitsu
Sambo
Breathing Programme — the second programme, built to the same rule
Throwing Principles Programme — builds on this: Phase 2 here is its condition of entry, because a partner is thrown there