Moreno-Tamayo K, Manrique-Espinoza B, Morales-Carmona E, et al. - Whether and how sleep duration and sleep complaints are associated with incident frailty, was inquired in this community-based cohort study from rural areas in Mexico with 309 older adults aged 70 and over. Researchers used data from waves two and three of the Rural Frailty Study. Sleep span was divided as: ≤ 5 h, 6 h, 7–8 h, and ≥ 9 h; and the self-reported sleep complaints as a dichotomous variable. A significantly higher risk of frailty at 4.4 years of follow-up was found in those who slept ≤5 h and in those who slept ≥9 h, vs the group that slept 7–8 h. There was no link between sleep complaints and incident frailty. Findings demonstrated an association of short and long sleep duration with the incidence of frailty. There is a requirement for studies that objectively assess sleep duration in order to clarify if meeting the recommended hours of sleep reduces frailty incidence.