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Pushing Harder Earlier After Stroke Doesn’t Improve Upper Limb

The ESPRESSo trial – Enhancing Spontaneous Recovery after Stroke – published in March 2026 in Brain Communications, delivers a clear finding: adding 90 minutes of high-intensity upper limb therapy each weekday for three weeks, begun within two weeks of stroke, did not produce better three-month outcomes than standard care alone.

Led by Professor Winston D. Byblow of the Department of Exercise Sciences and Centre for Brain Research at the University of Auckland, alongside Professor Cathy M. Stinear, Professor P. Alan Barber, and Professor John W. Krakauer of Johns Hopkins University, the trial enrolled 64 stroke survivors; half used a MindMaze videogame platform generating high volumes of exploratory hand and arm movements, half received conventional therapy… neither group outperformed a historical cohort who had received standard care only. The trial ran at Auckland City Hospital between 2021 and 2024 and was funded by the Health Research Council of New Zealand. Outcomes were measured immediately after intervention, then at three and six months post-stroke, with the primary endpoint being upper limb capacity at three months on the ARAT (Action Research Arm Test). Both intervention groups improved markedly between the start of the study and the end of the additional therapy period, with further smaller gains at three months,but those three-month outcomes were indistinguishable from the standard care cohort.

What makes this significant? The assumption that earlier and more intensive therapy capitalises on a window of neural plasticity has shaped stroke rehabilitation for years (partially dismantled by AVERT). But as Professor Byblow states: ‘early recovery after stroke is dominated by powerful biological repair processes, and increasing therapy dose very early after stroke may not enhance those processes.’ You’ve basically got a brain already doing a great deal of the work; and the evidence here suggests pushing harder against that process adds nothing at that early stage.

Crucially, participants were selected using biomarker stratification of corticospinal tract integrity (a world-first for a rehab trial), so the null result cannot be attributed to mixing high and low potential responders. It’s also worth noting that the videogame platform was rated as enjoyable by patients and achieved the same outcomes as conventional therapy; so digital rehab tools need not be inferior to hands-on treatment, even if neither added benefit over standard care at this early stage. Professor Byblow has suggested that the biggest gains from intensive training may come after spontaneous biological recovery has run its course, and that exploring biological treatments in the acute phase may be more productive than simply increasing activity-based loading.

This connects to the Auckland group’s longer body of work on proportional recovery; the finding that most survivors recover approximately 70% of lost upper limb function within three months if their corticospinal tract remains sufficiently intact. Biomarker tools such as the PREP2 algorithm – combining TMS-derived motor evoked potential data with clinical assessment – already predict upper limb recovery with over 80% accuracy and have been adopted at Auckland City Hospital.

In the UK, TMS is not yet close to being any kind of standard intervention in stroke units and NHS-wide biomarker-guided rehab remains many years off (something that ARNI friend (Emeritus) Professor Val Pomeroy is examining right now (and has done for many years). Realistically, routine adoption is unlikely before the early 2030s.

The persistent hand weakness that drives the need for trials like ESPRESSo is well documented; it’s known to reduce independence at six months after stroke and remains one of the most clinically significant unresolved challenges in neurorehabilitation. If the early acute phase is dominated by biology rather than therapy dose, the implication for NHS stroke services is that resource in the first two weeks might be better directed toward fatigue management, patient readiness, and preparing for the more intensive rehabilitation work that may yield greater returns once spontaneous recovery has stabilised.

ARNI Stroke Rehab UK says: this research reinforces that working with your biology rather than just against your deficits… and knowing where you are in your recovery trajectory… is what will make the real difference to what you get back.

 


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