Personalized balance training boosts motor skill transfer in older adults
A 6-week randomized trial in 30 healthy older adults found that balance training adjusted to individual ability (moderate difficulty) produced stronger gains in task performance and transfer to related motor skills compared to difficulty mismatched training.
Researchers randomly assigned 30 healthy older adults to either optimally-tailored (moderate difficulty) or suboptimally-tailored (too hard or too easy) dynamic balance training for 6 weeks. The key innovation was personalizing task difficulty to each person's baseline balance ability rather than applying a one-size-fits-all protocol.
Participants in the optimal group showed significantly higher performance gains in three of six training sessions, with the advantage most pronounced during high-demand testing conditions. Beyond the trained task itself, the optimally-trained group demonstrated greater improvements on related untrained balance tasks—a phenomenon called "near motor transfer"—measured at mid-training and post-intervention. Notably, no significant benefits appeared in cognitive measures (memory and executive function), suggesting the transfer effect was motor-specific. The study also found that individuals who learned the trained task most effectively tended to achieve the largest transfer gains, pointing to training responsiveness as a mechanism. A limitation is the relatively small sample (n=30) and short intervention window, which may underestimate longer-term benefits or transfer to daily activities.
The mechanism appears to involve what researchers call the 'Goldilocks zone'—difficulty that is neither frustratingly hard nor boredomingly easy maintains engagement and optimal neural adaptation, whereas both too-easy and too-hard training blunted learning. The near-transfer to untrained balance tasks suggests the brain builds a generalizable balance model rather than memorizing one specific movement pattern. Interestingly, cognitive transfer didn't occur, implying that motor and cognitive learning pathways may be semi-independent in this context. The within-group correlation between training task performance and transfer gains hints that the quality of learning (not just practice volume) predicts real-world motor benefit. This aligns with motor learning theory but hadn't been directly tested in aging populations with an optimization lens. Clinically, the result supports dynamic difficulty adjustment in fall-prevention and rehabilitation programs, though the 6-week window and healthy sample mean we don't yet know if frail or cognitively impaired older adults respond identically.
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Open in Cadence →References
- Response-optimised training improves learning of a complex motor task and closely related motor tasks. — Experimental gerontology (Read the original)