Association Between a Hybrid Video-Guided Multicomponent Exercise Program With Staff Assistance and Free-Living Gait in Older Adults With Knee and Low Back Pain: Secondary Analysis of a Randomized Controlled Trial.
Shuichi P Obuchi, Tomoyuki Arai, Hideaki Ishibashi et al.
✦ AI-curated · Sources linked
In 30 seconds
This secondary analysis of a randomized controlled trial examined whether a 12-week hybrid exercise program affected free-living walking in 59 community-dwelling adults aged 65 years or older with mild to moderate knee and/or low back pain. An ankle sensor measured daily-life walking during two planned 7-day windows. In the modified intention-to-treat analysis, the program was associated with longer step length (β=2.39 cm; P =.04; Hedges g =0.493); walking speed showed a smaller, borderline-significant effect. Other activity-volume measures showed no clear group differences. The authors consider the findings suggestive, not definitive.
Key findings
- Step length improved in the modified intention-to-treat analysis (β=2.39 cm; P =.04; Hedges g =0.493).
- Walking speed showed a smaller, borderline-significant effect (β=0.05 m/s; P =.06; Hedges g =0.496).
- Cadence, daily distance, daily steps, active energy expenditure, and accumulated activity at 3 or more metabolic equivalents showed no clear group differences.
- In per-protocol analysis, step length and walking speed retained the same direction of effect, but estimates were imprecise.
Why it matters
Sensor-based measures can capture aspects of mobility during everyday life, beyond performance in a supervised setting. The findings suggest that a hybrid exercise program may affect walking quality, particularly step length, even though measured activity volume did not clearly differ. This distinction may help frame mobility outcomes in exercise research, while the uncertainty argues against treating the result as established evidence.
What to keep in mind
The analysis included 52 participants under the modified intention-to-treat approach, and the per-protocol sensitivity analysis included 44; estimates in the latter were imprecise. The authors also note attenuation after multiplicity-aware interpretation.