Darbe Schlosser, MA
Founder, Think & Move Well
This article describes a coaching method. It does not report a trial and it does not report results.
In this practice, people with Parkinson's learn a memorized numerical sequence, organized into mnemonic chunks, then use it as the structure of their physical training. Within the work examined here, the client internally retrieves and recites that sequence while moving. The digits are not a distraction laid over exercise: they set how many repetitions happen, when movements change and, later, which movement happens next. The sequence is then deliberately reorganized to make the coordination harder.
The method is used across 98 clients, 143 coaching sessions and all three coaches in this practice's records. That describes how often it is used. It says nothing about whether it works. No outcome was measured, and nothing here should be read as evidence that the method improves any symptom of Parkinson's disease.
All three coaches in the practice teach the same task demands and use the same anchor structure, and the composite case shows a single client's work carried across two different coaches. That distinguishes a teachable method from one coach's improvisation.
Five kinds of evidence appear below, labeled wherever used: published research · Think & Move Well methodology · practice observation · composite case · proposed mechanism (hypotheses, explicitly not findings).
Published research.
Two documented difficulties sit behind this work.
Adherence. In a systematic review of 53 randomized trials covering 1,940 people with Parkinson's, only 69% of interventions retained at least 85% of participants, fewer than half reported adherence at all, and 72% did not report adverse events. Interventions averaged 8.3 weeks and 79% were facility-based (tmw-1336). The evidence base for keeping people exercising is thin, short and tied to buildings.
Interference. A meta-analysis of 19 studies found that adding a cognitive task reliably degrades walking in Parkinson's (SMD −0.68), regardless of the kind of secondary task and regardless of baseline gait speed (tmw-1343). Dual-task difficulty is a general feature of the condition, not an artefact of one task.
Published research.
Training under cognitive load helps and does not appear to raise fall risk. A meta-analysis of 11 randomized trials (597 participants) found motor-cognitive training improved dual-task gait speed by 0.12 m/s and reduced dual-task cost by 8.75%, at high GRADE certainty (tmw-1339). The DUALITY trial (n=121) found gains of 8–13% that held at 12 weeks, generalized to untrained tasks, and produced no significant change in fall risk (tmw-1346).
Automaticity is what is lost. In Parkinson's the sensorimotor striatum fails to sustain automatic motor programs, so movements that run without attention in others must be run by attentional control, which is possible but costly and slow. This underlies reduced arm swing, shortened stride, freezing and micrographia (tmw-1347).
Chunking is how sequences are learned. People spontaneously group sequence elements into chunks that behave as single memory units, typically two to four items long (tmw-1344).
Cognitively engaging exercise is not the same as exercise. Goal-based skill training recruits cognitive circuitry involved in motor learning and may act on both the cognitive and automatic components of motor control (tmw-1342). Task-specific training carries a strong recommendation on high-quality evidence in the APTA clinical practice guideline (tmw-1341).
Published research. Placed before the method deliberately.
No published study tests this method. A structured search returned no study, protocol, registration or case series in which a memorized digit sequence organizes a physical exercise program, in Parkinson's or any other clinical population; searches for method-of-loci and competitive-memory techniques in rehabilitation returned nothing. We report this as we identified no published reports of such a method, not as a claim that none exists. Indexed databases would not capture gray literature, a commercial program or a conference abstract.
Integration has not been shown to beat separation. DUALITY compared training the cognitive and motor tasks together against training them apart and found no advantage for the integrated arm (tmw-1346). A meta-analysis of 41 studies in older adults points the other way: simultaneous training was effective at g=0.385 where sequential was not (g=0.114, n.s.) (tmw-1337). But that was older adults on cognitive outcomes, not Parkinson's on gait. We record the tension rather than resolving it in our own favor.
Sequence learning is impaired in Parkinson's. This is the most direct challenge to a method built on a learned sequence, and two independent meta-analyses agree: impaired sequence-specific learning at effect size 0.83 in 299 people with Parkinson's against 244 controls (tmw-1338), converging with an earlier SMD of 0.73 (tmw-1345). Both concern implicit learning. This method teaches the sequence explicitly with mnemonic scaffolding; whether that distinction rescues it is a hypothesis, not a demonstrated advantage.
Attentional strategies have historically washed out. The same review supplying the automaticity rationale reports that cues and attentional strategies improve gait only short-term, reverting once attention lapses (tmw-1347). Any suggestion that this method produces durable automaticity is unsupported.
Cognitive training alone has not been shown to help. A Cochrane review of seven studies (225 participants) found no evidence of improvement in global cognition, with apparent attention and verbal-memory gains failing to survive sensitivity analysis (tmw-1340). This method is therefore not offered as cognitive training, and no argument here rests on cognitive-training evidence. It is offered as motor-cognitive integration: a different claim resting on different evidence.
Think & Move Well methodology.
The method described here is one recurring digit-structured component of the broader Think & Move Well coaching system. It does not represent the program's full movement, cueing, effort-modulation, or exercise-design methodology. Within the reviewed sessions, this digit structure was applied across multiple exercise formats, including resistance work, gait and stepping patterns, seated and standing movement, balance work, stretching, coordination tasks, and cardio.
The system is built on a memorized numerical sequence, held as mnemonically organized chunks. Chunk lengths fall in the two-to-four range that the memory literature reports for spontaneously formed memory units; the practice arrived there empirically rather than from that literature, though it converges with it. Longer sequences and further rearrangements may be introduced as a learner progresses.
The sequence is used two ways, under two different rule sets: it can be recited while movement runs, or each digit can be counted up to, so its value sets the repetition count. Movements are introduced one at a time, and the interaction between digits and movements becomes the training load. The stated aim is to raise the complexity someone can manage while thinking and moving at once.
The method rests on the distinction between a sequence you can only replay and one you can operate on. A melody carrying digits produces recall in a fixed order: it cannot be reversed mid-run, indexed into, re-grouped, or used to select an action. A structured sequence with rules and overlays can be all of those things, and the design treats each as a separate adjustable property: which part of the sequence is in play, how it is grouped, what its values govern, and how far its structure is disturbed. It is that manipulability, not the memorization, that is claimed as the active ingredient. That is design intent, not a claim that it succeeds.
Practice observation, from twelve individually reviewed coaching sessions and corpus-wide retrieval with the query stated.
The teaching is best described not as a sequence of stages but as a set of task demands organized around one element that does not vary. Each demand can be raised or lowered without touching the others, which is what makes this an architecture rather than a curriculum: the same client, the same movement and the same sequence can be recombined into materially different tasks by moving one dimension at a time. This working model, not any outcome, is this article's substantive contribution, because it is directly observable in a coaching record in a way an outcome is not.
The anchor: a structural constant. A stable anchor movement recurring within the set: a movement, position, or rhythm the client can return to while other parts of the task change. It is characterized in session as the element that always stays the same (tmw-0899). It appears in 842 sessions across 224 clients. It is not a demand; it is what holds the task together while the demands change.
Demand 1: Self-recall. This is the central demand. The client internally retrieves the memorized sequence and recites it while moving, with the coach tracking movement quality and sequence accuracy together (tmw-0502). This is the central internally generated demand examined in this paper; the level and form of coach support may vary.
Demand 2: Counting. The client generates or follows a count, setting extent and structure: how many repetitions, and when the movement changes. A coach may define a movement's extent by a count of digits rather than a count of repetitions (tmw-0899).
Demand 3: Number-governed movement selection. A rule overlay makes the digit's value select the movement. Two rule forms recur, each taught by more than one coach: a numerical threshold rule (298 sessions, 104 clients) and a parity-based rule (319 sessions, 133 clients). The rule forms are standing; the movements they select vary by session. Overlays are optional, and in session the coach describes the parity overlay as something that need not be applied (tmw-1017).
Demand 4: Disruption and reorganization. The structure is broken on purpose so the client must reorganize rather than repeat what is memorized. This is not a final stage. Deliberate restructuring of chunk boundaries is described in session as the introduction to disrupting the sequence (tmw-0349), and disruption appears across 213 sessions and 110 clients. Later disruption may demand more reorganization than early disruption. Heavier forms are rare. Separating the rhythm of recitation from the tempo of the movement appears in 15 sessions across 16 clients (tmw-1022) and is not representative of disruption generally. Disruption is also paired with a longer coordination sequence (tmw-0166).
A variable support condition: coach support. The coach may recite alongside the client, model timing, monitor accuracy, redirect, correct an error, restart the sequence, or occasionally interleave prompts. In one session coach and client recite together while the coach times his delivery to the movement (tmw-0653); in another the coach interleaves numbers while the client counts (tmw-0899). This is a support condition that varies, not the defining cueing model. The client's own retrieval remains the central demand.
The design intent behind the demands. Three choices recur in how the demands are set. Disruption exists to prevent the sequence being replayed automatically: once a pattern can run without reorganization, it is restructured. Open choice may be deliberately constrained, so that a decision the client would otherwise make freely is instead determined by a digit's value; this is one option among several, and at other times the choice itself is part of the task. And the anchor is held constant precisely so that everything else can change without the task losing its shape. These are stated design intentions drawn from how the coaching is described in session, not findings about what the design achieves.
The demands vary independently. Every session reviewed combines several, and the two most advanced contain more early-demand structure work than the early sessions do. A demand attaches to the material, not the person: new content returns to plain structure while the client continues under heavier demands on content they already hold, which means one person can be operating at several levels within a single session. Complexity is therefore not a single dial. In one session the rule layer hardens while the sequence in play is shortened (tmw-0769, tmw-0163): load is moved from memory to rule application rather than simply increased.
Two recurring observations. Chunk transitions are where performance most often breaks (tmw-0163). And hesitation is not automatically an error. One coach explicitly framed a client's hesitation as productive processing rather than a fault (tmw-0502). Both patterns of breakdown have been seen (movement degrading while the sequence holds, and the reverse), with neither claimed as general.
Practice observation. Uncontrolled, and not an outcome.
Digit-structured work is not an occasional technique in this practice; it is the organizing spine of the program. It appears in 1,091 of the 1,189 de-identified sessions in this corpus (92%) and with 257 of 299 clients (86%). Within that, the specific mnemonically organized pattern formalized as a hypothesis appears in 143 sessions across 98 clients and all three coaches (tmw-1302). Both figures come from stated retrievals: the broader one captures digit-structured work of any kind, the narrower one only that formal pattern. Neither carries information about effect.
The method is transmitted between coaches. More informative than the count is the composite case: one client's self-recall and number-governed selection work was led by a coach other than the method's originator, while a second client's early structure work was led by a third coach and the later disruption work by the originator. The same demands and the same anchor structure are recognizable in each.
This is the most defensible claim in this article. A method that only its originator can deliver is a personal style; one that other coaches teach recognizably is a method, and only a method can be taught, critiqued, or tested by anyone else. It also implies a degree of systematization: for three coaches to run the same demand structure across most of a 299-client practice, the structure has to be specified well enough to hand over. What that specification is, and how coaches are trained in it, is not documented here. What this is not is a fidelity measurement. No fidelity instrument was used, no independent rater scored these sessions against a protocol, no adherence-to-protocol score exists, and no attempt was made to quantify how closely any coach followed the structure. The claim is that the same demands are recognizable across coaches on reading, not that delivery was measured and found consistent.
One repeated coaching observation is the one most easily mistaken for a result. Coaches substitute recitation of the memorized sequence for ordinary counting, so a set runs to as many repetitions as the sequence is long rather than to a round number (tmw-1237). That is a consequence of sequence length. What is not established is anything about effort, exertion, heart rate, autonomic response or training adaptation. No perceived-exertion scale, heart-rate measure, heart-rate variability or oxygen-uptake data exists anywhere in this practice's records. Statements elsewhere in our own materials about exertion being unchanged, or about autonomic re-patterning, are hypotheses that have never been measured and are treated here as hypotheses only.
Coaches also report that clients stay engaged with this format. That is an impression from the practice that developed the method, gathered without a comparison group or a structured instrument.
Representative Composite Case. This example combines recurring coaching observations from multiple de-identified coaching sessions. It is intended to illustrate common coaching patterns and is not the story of one individual.
A companion piece follows two de-identified clients across seven sessions and roughly five months, covering the full range of task demands and all three coaches, and records where people reliably stall. It reports no outcomes.
See: Learning the Digit System: A Representative Composite Case.
Proposed mechanism. None has been tested here; each is stated with what would falsify it.
Hypothesis 1: Explicit scaffolding. Because the sequence is taught explicitly and chunked mnemonically rather than acquired implicitly, the method may sidestep the implicit sequence-learning deficit documented in Parkinson's (tmw-1338, tmw-1345). The practice's chunk lengths land where the chunking literature says memory units form (tmw-1344). That is convergence, not design. Falsified if acquisition rate tracks implicit sequence-learning measures.
Hypothesis 2: Internal cueing. Because the sequence is generated by the person rather than delivered by a device, it may not fade as external cues do. This confronts the finding that attentional strategies wash out (tmw-1347). Falsified if gains revert on the same timescale as external cueing after training stops.
Hypothesis 3: Integration rather than addition. Rule-based digit-to-movement mapping may train set-shifting within the motor task rather than adding an unrelated second task alongside it. This sits directly against DUALITY's null (tmw-1346) and is offered as unresolved. Falsified if an integrated arm performs no better than a matched consecutive arm on dual-task gait.
Hypothesis 4: Perceived effort. Attention occupied by the sequence may alter how effortful the work feels. This is entirely unmeasured, and no autonomic or cardiovascular claim is made or implied. Falsified if rated perceived exertion tracks mechanical work identically with and without the digit structure.
A pilot randomized comparison: sequence-coupled movement practice against equivalent practice without the digit coupling, matched for duration and mechanical work.
Primary outcome: dual-task cost on gait speed, the measure with the strongest evidence base here. Secondary: a cognitive-motor integration measure; rated perceived exertion, testing Hypothesis 4 directly and cheaply; and adherence reported in full including non-completers, which most trials have not done (tmw-1336). Baseline and four months, with follow-up long enough to probe the durability question external cueing has historically failed.
A negative result would be informative. If dual-task cost does not move, the cognitive-motor rationale offered here would not survive, and we would say so.
There is no control group, no randomization, no blinding, no standardized instrument and no outcome measurement of any kind. Coaching records were made for coaching, not research.
Sessions were selected for review because they contained the teaching, which is a form of selection bias. This article can describe how the method is taught, not how often it fails to take. Transcripts are automated speech recognition and contain errors, including in numeric content.
All observations come from the practice that developed the method, interpreted by its developer. That is the most serious limitation here, and nothing in this article corrects for it.
Client speech is paraphrased rather than quoted, because the underlying session records have not individually completed de-identification review. This protects participants and costs the article the persuasive force of first-person voice. That is deliberate.
Parkinson's from the implicit learning the meta-analyses measured?
less about those who disengaged.
Commentary from Think & Move Well. This section is opinion, not a finding. The dominant message to people with Parkinson's is that exercise is medicine and more intensity is better. We think that message is incomplete rather than wrong. It describes a dose without describing a structure, and leaves coaches and clinicians without an answer to what the person should be thinking about while they move. What we can defend today is narrow: the method exists, it is defined, it is organized around a teachable set of task demands and a stable anchor, and three coaches teach it across nearly a hundred clients. Whether it changes anything is an open question, one we would rather see answered by someone with a control group than by us.
All twelve are held as graded records in the Think & Move Well research library; the internal identifier follows each entry.
Think & Move Well provides movement coaching and education. It does not provide medical advice, diagnosis or treatment. Nothing here is a recommendation to start, stop or change any medication, therapy or treatment. Parkinson's disease varies widely between individuals; consult your neurologist, movement disorder specialist or physical therapist before changing what you do. Training under cognitive load can increase the difficulty of walking and balance tasks in the moment, and should be introduced gradually and with appropriate supervision.
Corrections policy. We correct errors. If you find one in this article, including in how we have represented any cited study, email darbeschlosser@motorvationusa.com with the section and what is wrong. We will review it, correct the page if the error is confirmed, and add a dated note recording what changed.