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06.05.2017 | Original Research Article | Ausgabe 12/2017

Sports Medicine 12/2017

Which Women are Highly Active Over a 12-Year Period? A Prospective Analysis of Data from the Australian Longitudinal Study on Women’s Health

Zeitschrift:
Sports Medicine > Ausgabe 12/2017
Autoren:
Toby G. Pavey, Tracy L. Kolbe-Alexander, Leonie Uijtdewilligen, Wendy J. Brown
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1007/​s40279-017-0732-0) contains supplementary material, which is available to authorized users.

Abstract

Introduction

Current Australian physical activity (PA) guidelines encourage adults to accumulate 150–300 min of moderate to vigorous PA each week. Some critics assert that 300 min is unachievable.

Objectives

The aims of this study were to identify the proportion of younger and mid-aged women who met the 300-min recommendation over a 12-year period, examine how the “highly active” women achieved this level of activity (in terms of walking, moderate activity, and vigorous activity), and to identify the sociodemographic, biological, lifestyle, and work-related determinants of being “highly active”.

Methods

Younger (n = 7843) and mid-aged (n = 8043) participants in the Australian Longitudinal Study on Women’s Health completed triennial surveys between 2000 and 2013, when their ages were 24.6–36.3 and 52.5–64.5 years, respectively. Self-reported PA was assessed as time spent in walking, moderate activity, and vigorous activity in the previous week; an index of MET.min/week was derived and dichotomized as <1000 MET.min/week (<300 min; not highly active) or ≥1000 MET.min/week (≥300 min; highly active). Generalized estimating equations were used to examine univariable and multivariable associations between a number of sociodemographic, lifestyle, and health variables with PA status (measured at every survey).

Results

In the younger cohort, the proportion who were highly active decreased from 40% in 2000 to 31% in 2012. High levels of activity were achieved through a combination of walking (39.1–45.1% of total activity) and vigorous PA (41.8–47.7%). In the mid-age cohort, the proportion of women who were highly active increased from 32% in 2001 to 47% in 2013; this was achieved predominantly through walking (55.8–59.7%). In multi-variable models, the highest odds for being in the high PA category (odds ratios [ORs] ≥ 1.20; p < 0.001) were for younger women who were single, those who worked long full-time hours, those who drank any quantity of alcohol, and those who sat for less than 8 h/day. In the mid-age cohort, the highest odds for being in the high PA category (ORs ≥1.20; p < 0.001) were for women with post-school education, those who were retired, those who were low-risk drinkers (compared with non-drinkers), those who sat for less than 8 h/day, and those with lower levels of stress.

Discussion

Our findings clearly indicate that the upper limit of the Australian PA guidelines is achievable for large numbers of women. Factors associated with being highly active were different for younger and mid-age women, but healthy weight, high education, and paid work (full-time in the younger women, part-time in mid-age) were common characteristics of highly active women in both cohorts.

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