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  2. Activity theory (aging) - Wikipedia

    en.wikipedia.org/wiki/Activity_theory_(aging)

    The activity theory of aging, also known as the implicit theory of aging, normal theory of aging, and lay theory of aging, proposes that aging occurs with more positive outcomes when adults stay active and maintain social interactions as they get older. [1] Activity theory suggests that the aging process is slowed or delayed, and quality of ...

  3. Activity theory - Wikipedia

    en.wikipedia.org/wiki/Activity_theory

    Activity theory ( AT; Russian: Теория деятельности) [1] is an umbrella term for a line of eclectic social-sciences theories and research with its roots in the Soviet psychological activity theory pioneered by Sergei Rubinstein in the 1930s. It was later advocated for and popularized by Alexei Leont'ev.

  4. Active ageing - Wikipedia

    en.wikipedia.org/wiki/Active_ageing

    Active ageing. Active ageing ( active aging in the US) is a concept recently deployed by the European Commission, the World Health Organization, and used also in Human Resource Management. This concept evokes the idea of longer activity, with a higher retirement age and working practices adapted to the age of the employee.

  5. Gerontology - Wikipedia

    en.wikipedia.org/wiki/Gerontology

    The activity theory is applicable for a stable, post-industrial society, which offers its older members many opportunities for meaningful participation. Weakness: Some aging persons cannot maintain a middle-aged lifestyle, due to functional limitations, lack of income, or lack of a desire to do so. Many older adults lack the resources to ...

  6. Ageing - Wikipedia

    en.wikipedia.org/wiki/Ageing

    Ageing (or aging in American English) is the process of becoming older. The term refers mainly to humans , many other animals , and fungi, whereas for example, bacteria, perennial plants and some simple animals are potentially biologically immortal . [1]

  7. Aging and society - Wikipedia

    en.wikipedia.org/wiki/Aging_and_society

    Disengagement theory, activity theory and continuity theory are social theories about ageing, though all may be products of their era rather than a valid, universal theory. Other definitions [ edit ] As cyborgs currently are on the rise some theorists argue there is a need to develop new definitions of aging and for instance a bio-techno-social ...

  8. Category:Theories of ageing - Wikipedia

    en.wikipedia.org/wiki/Category:Theories_of_ageing

    Selectivity theory (aging) Socioemotional selectivity theory. Stage-crisis view. Stem cell theory of aging. Stereotype embodiment theory.

  9. Free-radical theory of aging - Wikipedia

    en.wikipedia.org/wiki/Free-radical_theory_of_aging

    The free radical theory of aging states that organisms age because cells accumulate free radical damage over time. [1] A free radical is any atom or molecule that has a single unpaired electron in an outer shell. [2] While a few free radicals such as melanin are not chemically reactive, most biologically relevant free radicals are highly ...