Walking is the most preferred PA mode for older adults [4] and increasing daily step count may reduce the presence of frailty. Observational research finds a dose-response relationship with higher daily step counts associated with lower frailty prevalence [5]. This relationship persists even among those with very low step counts (less than 3,000 per day) suggesting any increase in step counts may reduce frailty presence. Step counts can be increased by walking for longer durations or walking faster for the same duration. Observed as the 6^th vital sign, gait speed is a key frailty indicator, as slow gait speed is one of the most frequently observed and prevalent criteria of frailty [6]. Since gait speed predicts mortality, falls, loss of independence, and cognitive decline [7], and is an important clinical metric of overall health [8], interventions which improve capacity to ambulate faster and over longer distances (e.g., a greater volume of activity) may be particularly therapeutic for those with frailty…

This is the first study to demonstrate that HIW can reverse frailty in older adults with frailty. After 16 weeks, HIW participants had significantly higher odds of improving at least one SHARE-FI frailty category compared to CSW participants. Numerous prior studies have investigated physical activity, multicomponent training, resistance exercise, and nutrition^3,9 to improve capacity and physical function, rather than directly modifying the frailty syndrome. In a systematic review of 26 PA intervention studies for frailty, only one study used an aerobic intervention, and this study did not measure frailty as a primary outcome. [25]. In studies that have used frailty as a primary outcome, minimal benefit has been found. Huang et. al, found a 0.02 reduction in frailty index after 26 weeks of training twice-weekly at 70% of heart rate reserve, which did not meet the 0.03 threshold for clinical meaningful change in frailty index scores [26,27]. The combination of aerobic and resistive aerobic activities in our approach may have provided sufficient neuromuscular stimulus by increasing frequency and intensity of activity, despite a shorter intervention duration, to drive improvements in frailty category. Our study advances evidence for the optimal dose of therapeutic interventions for the frailty and provides clear evidence on the substantial benefits of high-intensity walking to decrease and reverse frailty among those with existing frailty. Our approach, which incorporated some resistance elements into aerobic training, was distinct.

Citation: Danilovich M, Rubin DS, Conroy DE, Diaz L, Cheung Y, Corcos D, et al. (2026) A high intensity vs. casual speed walking intervention to reverse frailty among older adults: a cluster randomized controlled trial. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0357605

But first, must get these Chinknees fixed.