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Background and Objectives: Subjective age, that is, how old people feel in relation to their chronological age, has mostly been investigated from a macro-longitudinal, lifespan point of view and in relation to major developmental outcomes. Recent evidence also shows considerable intraindividual variations in micro-longitudinal studies as well as relations to everyday psychological correlates such as stress or affect, but findings on the interplay with physical activity or sleep as behavioral factors and environmental factors such as weather conditions are scarce., Research Design and Methods: We examined data from 80 recently retired individuals aged 59-76 years ( M  = 67.03 years, 59% women) observed across 21 days. Daily diary-based assessments of subjective age, stress, affect, and sleep quality alongside physical activity measurement via Fitbit (steps, moderate-to-vigorous physical activity) and daily hours of sunshine were collected and analyzed using multilevel modeling., Results: Forty-four percent of the overall variance in subjective age was due to intraindividual variation, demonstrating considerable fluctuation. Affect explained the largest share in day-to-day fluctuations of subjective age, followed by stress and steps, whereas sunshine duration explained the largest share of variance in interindividual differences., Discussion and Implications: In our daily diary design, subjective age was most strongly related to self-reported affect as a psychological correlate. We, however, also found clear associations with objective data on daily steps and weather. Hence, our study contributes to contextualizing and understanding variations in subjective age in everyday life., Competing Interests: None., (© The Author(s) 2024. Published by Oxford University Press on behalf of The Gerontological Society of America.)

Background and Objectives: Longevity is a societal achievement. However, people might not wish to live long lives under all conditions. When deciding about their longevity desires, some individuals may focus on present-oriented, concrete aspects of their lives, like their current state of health, whereas others may weigh up more future-oriented, abstract aspects, such as how important it is to be healthy. We investigated what factors are associated with individuals' willingness to live with impairment., Research Design and Methods: Factors associated with willingness to live with impairment were examined in a sample of N  = 790 German participants aged 39-90 years ( M age  = 63.38, SD  = 14.30, 51% female). To examine age-specific factors related to desired longevity under impairment conditions, chronological age was added as a moderator in the analyses., Results: Findings indicated that for middle-aged adults, fear of becoming a burden and higher importance of health were associated with lower willingness to live with impairment. For older adults, lower willingness to live with impairment was associated with higher levels of instrumental preparation for the end of life., Discussion and Implications: The obtained age differences can be understood as reflecting a shift in time perspective and personal experiences. Among middle-aged adults, willingness to live with impairment is more strongly influenced by distant events that pertain to the future (e.g., fear of becoming a burden). Older adults, however, place more importance on their current life situation (e.g., instrumental preparation), and their willingness to live with impairment seems to be more conditional on practical aspects in the present., Competing Interests: None., (© The Author(s) 2023. Published by Oxford University Press on behalf of The Gerontological Society of America.)

Over the past decades, increases in life expectancy in most modern societies have raised questions about whether and to what extent individuals value possible extensions of their personal lifetime. In this vein, a new field of research emerged that investigates the determinants, concomitants, and consequences of longevity values and personal preferences for an extended lifetime across adulthood. Based on a review of available theoretical and empirical work, we identified 3 mindsets on the challenges and potentials of human longevity common in research as well as personal views: (a) an essentialist mindset that builds on ideal principles of an infinite life, aimed at conquering or significantly postponing a biologically determined aging process, (b) a medicalist mindset that appraises aging as being primarily based on quality of health, and (c) a stoicist mindset that associates longevity and lifetime extension with the experience of grace and meaning. In this regard, we submit that motivation for longevity and its behavioral consequences differ depending on what mindsets individuals adopt in a given developmental context. We suggest that mindsets of longevity motivation are embedded in personal belief systems (e.g., death acceptance) that may depend on health, and on context influences (e.g., culture). Mindsets of longevity motivation may be related to differences in health behavior and late-life preparation. We illustrate such ideas with an exploratory analysis from a cross-cultural data set. We discuss the possible implications of these mindsets of longevity motivation for the aging sciences, and with regard to individual ways of approaching old age.