POWER training in chronic stroke individuals: differences between responders and nonresponders.

The sample was small, so the subgroup findings are not stable. Participants were split into responders and non-responders after training based on walking-speed change, so the groups were not assigned before the intervention. The training combined high-velocity resistance exercises and fast walking, so the contribution of either component alone cannot be separated. The analysis included only people who completed POWER training, not a comparison group. Walking outcomes were limited to speed and distance, and power testing was limited to knee extensors. Responders had better baseline walking endurance than non-responders, so baseline endurance may have influenced group classification.

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Do not conclude POWER training reliably improves walking speed for all people with chronic stroke. Some participants improved leg power without meaningful walking gains, and the program combined lower-limb resistance exercises and fast walking, so the effect of either part alone cannot be separated.