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Quality of life and physical activity in an older working-age population

Authors Puciato D, Borysiuk Z, Rozpara M

Received 15 June 2017

Accepted for publication 31 August 2017

Published 4 October 2017 Volume 2017:12 Pages 1627—1634

DOI https://doi.org/10.2147/CIA.S144045

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Akshita Wason

Peer reviewer comments 2

Editor who approved publication: Dr Richard Walker


Daniel Puciato,1 Zbigniew Borysiuk,1 Michał Rozpara2

1Faculty of Physical Education and Physiotherapy, Opole University of Technology, Opole, 2Faculty of Physical Education, The Jerzy Kukuczka Academy of Physical Education in Katowice, Katowice, Poland

Objective:
Physical activity can be an effective means of prevention and therapy of many psychosomatic disorders. It can also have a significant impact on the quality of life of older working-age people. The aim of the present study was to assess the relationships between quality of life and physical activity in older working-age people from Wroclaw, Poland.
Materials and methods: The study group comprised 1,013 people, including 565 women and 448 men, aged 55–64 years (59.1±2.9 years). The study took form of a questionnaire survey. The participants assessed their physical activity and quality of life using the International Physical Activity Questionnaire Short Version (IPAQ-SF) and the World Health Organization Quality of Life (WHOQOL-BREF), respectively.
Results: The highest mean indices of general quality of life, perceived health status, and quality of life in the physical, psychological, social, and environmental domains were shown by respondents whose intensity of physical activity was the highest. Moreover, the odds of high assessment of overall quality of life increased with respondents’ higher levels of physical activity.
Conclusion: Quality of life improvement programs should also involve increased physical activity components.

Keywords:
physical activity, IPAQ-SF, quality of life, WHOQOL-BREF, big city environment

Introduction

The issue of quality of life of older working-age people is highly significant. Results of some earlier studies indicate that decreased quality of life is often associated with the prevalence of psychosomatic and motor function disorders as well as with impaired social performance.14

An important determinant of quality of life is physical activity. Apart from lowering physical fitness and performance,57 insufficient physical activity can also increase the risk of muscle atrophy, sarcopenia, osteoporosis, type 2 diabetes, arterial hypertension, coronary heart disease, and certain types of cancer.819 Studies indicate negative consequences of hypokinesis for mental health and intellectual abilities, eg, cognitive disorders, increased anxiety, discomfort and low self-esteem, high stress levels, and sleeping disorders.2025

Undertaking properly dosed physical activity allows older working-age people to maintain their physical and mental fitness at an appropriate level and enable effective performance of their professional duties.26,27 Halloway et al28 and Kirk-Sanchez and McGough29 observed positive effects of exercise on brain health and cognitive performance in adult populations. Physical activity may therefore fulfill both preventive and rehabilitative functions in this particular age group. Physical exercises undertaken by people at this age can be regarded as interventions aimed at maintaining or improving their overall psychophysical fitness, proper functioning of the overloaded body,6,7,16,17,19,20 or full recovery after diseases, injuries, or fatigue states.912,21,22,25 In addition, the beneficial influence of physical activity on the functional autonomy of elderly people (usually declining with age) should be stressed.30

It must be noted that appropriate levels of physical activity are far from common among the elderly. Involutionary changes observed in elderly people together with the incidence of various ailments often lead to fairly limited physical activity in this age group.3133

Potential links between quality of life and physical activity were subject to earlier studies, which showed that physically active individuals assessed some of their quality of life domains higher than their physically non-active counterparts.3441 Some authors even suggest that infirm persons who exercised regularly assessed their quality of life higher than healthy but physically non-active individuals.42 The volume of exercise is crucial here, since therapeutic effects of exercise can only be seen at a moderate or high level of performance.6,43 A few studies so far have examined relationships between quality of life and physical activity of older working-age persons, but they have focused on general populations or, in fact, on post-working-age individuals.34,3638 The aim of the present article was to assess relationships between quality of life and physical activity in an older working-age population from Wrocław, Poland. Two main research questions were formulated:

  1. Are general quality of life (GQOL), quality of life in its particular domains (physical domain [PHYD], psychological domain [PSYD], social domain [SD], environmental domain [ED]), and perceived health satisfaction determined differently by the physical activity level?
  2. Are there relationships between the assessed quality of life and the level of physical activity among the studied population?

Materials and methods

A cross-sectional questionnaire survey was carried out in 2014 in Wrocław, Poland. The research project had been approved by the Commission of Bioethics of the University School of Physical Education in Wrocław. Before the start of the study, the minimum sample size was calculated using the following formula:

where n is the minimum sample size, N the size of the Wrocław working-age population, d the maximum error of estimate, and zα the critical value of normal distribution at the assumed confidence level.

The survey interviewers took part in a training session during which they were specifically instructed about the aims of the study, the structure of questionnaire forms, filling instructions, and the means of effective communication with respondents. The questionnaire survey took place in November 2014. The study group comprised 1,013 people (565 women and 448 men) aged 55–64 years (59.1±2.9 years), ie, ~1% of the Wrocław population at this age. All participants were informed about the purpose and the course of the study and gave their written consent to participate. The questionnaire survey was carried out in the form of hall testing. The mean percent age of respondents who refused completing the questionnaire was 46%.

The participants assessed their habitual physical activity using the International Physical Activity Questionnaire Short Version (IPAQ-SF).44 The IPAQ-SF comprises items assessing the frequency and duration of physical activity in three ranges of intensity: vigorous physical activity (VPA =8.0 metabolicequivalent [METs]), moderate physical activity (MPA =4.0 METs), and low physical activity (LPA =3.3 METs) undertaken across a set of domains including leisure time, domestic and gardening (yard), and work-related and transport-related activities during a typical week of their life. On the basis of collected data on the frequency and duration of physical activity and estimated energy expenditure (EE) expressed in MET·min/week, the respondents were categorized into three groups according to their physical activity levels:

  1. High physical activity level (HPAL) – meeting any one of the following criteria: 3 or more days of vigorous activity of at least EE ≥1,500 MET·min/week or 7 or more days of any combination of activities of three intensity ranges of at least EE ≥3,000 MET·min/week.
  2. Moderate physical activity level (MPAL) – 3 or more days of vigorous activity of at least 20 minutes/day, 5 or more days of moderate- or low-intensity activity of at least 30 minutes/day, or 5 or more days of any combination of low-, moderate-intensity or vigorous activity of at least EE ≥600 MET·min/week.
  3. Low physical activity level (LPAL) – no physical activity reported or some activity reported but not enough to meet at least the MPAL criteria.

Quality of life was assessed using the World Health Organization Quality of Life (WHOQOL-BREF) instrument.45 WHOQOL-BREF comprises 26 items: two measuring GQOL and perceived health condition (PHC), respectively, which were examined separately, and 24 measuring quality of life in four broad domains: PHYD (seven items), PSYD (six items), SD (three items), and ED (eight items). Particular facets incorporated within the domains included the following:

  1. Physical health: activities of daily living, dependence on medicinal substances and medical aids, energy and fatigue, mobility, pain and discomfort, sleep and rest, and work capacity.
  2. Psychological: bodily image and appearance, negative feelings, positive feelings, self-esteem, spirituality/religion/personal beliefs, thinking, learning, and memory and concentration.
  3. Social relationships: personal relationships, social support, and sexual activity.
  4. Environment: financial resources, freedom, physical safety and security, health and social care: accessibility and quality, home environment, opportunities for acquiring new information and skills, participation in and opportunities for recreation/leisure activities, physical environment (pollution/noise/traffic/climate), and transport.

Each item was scored from 1 to 5. Higher scores denoted higher quality of life and better perception of health condition. For the first two items, the numerical scores were the basis for further analysis. The scores to the remaining 24 items were transformed on a special 4- to 20-point scale.45 Additionally, the index of GQOL was expressed on a nominal scale. The results on a nominal scale (1–5 points) were then converted into sten scores (1–10 stens) according to the formula: S =5.5+2× ZZ (S – raw data after transformation and ZZ – raw scores multiplied by mean and standard deviation). Next, the obtained sten scores were used to categorize participants into groups with different ranges of perception of GQOL: <6 stens – low, 6 stens – medium, and >6 stens – high.46 The collected questionnaire data were cleaned and subjected to statistical analysis. The dependent variables included GQOL, perception of health condition, and quality of life in four domains: PHYD, PSYD, SD, and ED. The independent variable was the physical activity level (low, moderate, vigorous).

The statistical significance of differences between GQOL and health perception in groups of participants categorized according to their physical activity levels was measured with the Kruskal–Wallis one-way analysis of variance by ranks and multiple comparisons mean ranks post hoc tests. Multinomial logistic regression analysis was used to assess relationships between quality of life and physical activity levels. The level of statistical significance was set ex ante at α<0.05. All statistical calculations were made using IBM SPSS Statistics 20.

Results

Among the older working-age respondents from Wrocław, the highest percentage (42.3%) were individuals with a high level of physical activity, followed by 36.2% with a moderate level and 21.4% with a low level. Highly and moderately active individuals were significantly more numerous (p<0.001) than participants with low levels of physical activity. The differences between the groups of moderately and highly physically active participants were statistically nonsignificant (p≥0.05; Table 1).

Table 1 Number and percentage of respondents in groups with different levels of physical activity
Notes: Significant differences (*p<0.001) and no significant differences (NSp≥0.05) between participants. n, number of respondents; %, percentage of respondents. aLPAL vs MPAL. bMPAL vs HPAL. cHPAL vs LPAL.
Abbreviations: LPAL, low physical activity level; MPAL, moderate physical activity level; HPAL, high physical activity level.

The analysis of mean assessment values of particular quality of life domains in physical activity groups of Wrocław inhabitants aged 55–64 years revealed statistically significant differences between the groups. The highest quality of life (3.8±0.8 points) was indicated by individuals with high levels of physical activity, followed by those with low levels of physical activity (3.7±0.8 points). The lowest quality of life (3.6±0.9 points) was marked by respondents featuring a moderate level of physical activity. The Kruskal–Wallis test (H =48.6, p<0.001) indicated that the mean ranks of quality of life in groups according to physical activity levels differed significantly from one another. The p-values for post hoc multiple comparisons between mean ranks in particular groups revealed statistically significant differences between the quality of life of highly physically active individuals and that of those with moderate and low levels of physical activity. No such differences were noted between the moderately and the least physically active respondents (Table 2).

Table 2 Quality of life in groups of respondents with different levels of physical activity
Notes: , mean; SD, standard deviation; , mean ranks; H, Kruskal–Wallis test; p, Kruskal–Wallis test probability value.
Abbreviations: LPAL, low physical activity level; MPAL, moderate physical activity level; GQOL, general quality of life; HPAL, high physical activity level; PHC, perceived health condition; PHYD, physical domain; PSYD, psychological domain; SD, social domain; ED, environmental domain.

General health satisfaction was the highest among the most active respondents (3.7±0.9 points), followed by the moderately (3.5±1.0 points) and the least active Wrocław respondents (3.7±1.0 points). The differences in perceived health status were statistically significant in groups of respondents with different levels of physical activity (H =85.3, p<0.001). The post hoc comparison between the groups revealed differences in health status perception between the high- and moderate-activity groups and between the high- and low-activity groups (p<0.001; Table 2).

Statistically significant differences between groups with different physical activity levels were also noted in all four domains of quality of life assessment. The highest scores in WHOQOL domains were attained by respondents with the highest levels of physical activity. In the physical health domain and SD, the lowest quality of life was noted among the least physically active respondents, whereas in the PSYD and ED, the lowest scores were given by individuals with moderate levels of physical activity. In the groups with different levels of physical activity, the mean ranks of all quality of life domains differed significantly from one another (p<0.001). Intergroup post hoc comparisons revealed statistically significant differences between the groups with LPAL and HPAL and MPAL and HPAL and in the case of the ED also between groups with LPAL and MPAL (Table 2).

Table 3 shows the results of multinomial logistic regression analysis illustrating relationships between physical activity and quality of life of older working-age respondents from Wrocław. The reference category for the model trichotomous dependent variable, ie, quality of life, was its low level. The values of goodness-of-fitting model (χ2=49.7) and test probability (p<0.001) indicate that the specific model was significantly different from the one containing only the intercept parameter, and the level of physical activity significantly affected the quality of life in a given study group.

Table 3 Multinomial logistic regression analysis parameters of dependent variable: overall quality of life
Notes: The reference category for the dependent variable is LQOL, χ2=49.7, and p<0.001. β, assessment value of model parameters; SE, asymptotic standard error β; Wald χ2, parameter significance; p, probability level for Wald χ2.
Abbreviations: OR, odds ratio; CI, confidence interval; AQOL, average quality of life; LPAL, low physical activity level; HPAL, high physical activity level; MPAL, moderate physical activity level; HQOL, high quality of life; LQOL, low quality of life.

In the group of older working-age respondents, the odds that they assessed their quality of life as medium (not low) were 57% lower among the least physically active respondents and 23% lower among the moderately active respondents. The odds that the respondents would assess their quality of life as high (not low) were more than seven times lower (odds ratio [OR] =0.14) in respondents with low physical activity than those with high levels of physical activity. As for the participants featuring a moderate level of physical activity, these odds were two times lower than in people with high levels of physical activity (OR =0.57; Table 3).

Discussion

The results of the present study showed that the physical activity level determined the quality of life in older working-age populations. Perceived GQOL, health status, and quality of life in the PHYD, PSYD, SD and ED were assessed as the highest by the most physically active respondents. Statistically significant correlations were also found between GQOL and the physical activity level. Furthermore, the odds of high assessment of GQOL were the highest among the most active individuals, followed by moderately active individuals, and were the lowest among the least physically active respondents.

High assessments of overall quality of life by individuals participating in properly dosed resistance training programs, compared with controls, were also noted by Ramirez-Campillo et al.36 Considering the study results indicating positive relationships between perceived quality of life and physical activity, the lack of movement – which is fairly common among older working-age people – should be treated as a worrisome trend. This observation was shared by Brown et al,47 who found that only ~40% of people older than 50 years followed health recommendations regarding physical activity. Similar results were achieved by Puciato et al,31 Schneider and Becker,32 and Ignasiak et al.33

Some earlier studies also indicated positive links between satisfaction with one’s own health and physical activity.34,38,48 They may have resulted from the usually better health status of physically active people than non-active ones.8,16,19,20 However, as shown by Kaczmarek et al,49 perceived health status not only depends on objective but also subjective factors, ie, psychological, social, and cultural. It is also affected by one’s lifestyle and socioeconomic status. According to Wojszel,50 perceived health status is the best determinant of auspicious aging. Thus, in older working-age populations, physical activity can play a preventive role and contribute to their better coping with the characteristic symptoms of aging.

The study of the Wrocław population also confirmed positive effects of physical activity on the PHYD of quality of life, as noted by other authors.34,40,51 Better physical health and physical fitness and performance of active individuals have a positive influence on their locomotive and self-maintenance skills as well as the ability to perform professional duties and domestic chores.5,8,27 Some authors even indicated potential, indirect links between quality of life and human functional traits.7,52 In addition, physical activity was shown to have a positive effect on sleep sufficiency in the elderly.53,54

The present study, as well as some earlier research, revealed positive relationships between physical activity and the PSYD of quality of life34,41,55,56 Some authors suggest that the psychological quality of life is only positively affected by moderate- and high-intensity exercises.36,51 Researchers have also documented the positive role of physical activity as a factor enhancing the prevention or treatment of depression,57,58 anxiety,59 or other neurological disorders.60 The present study also confirms positive relationships between the SD of quality of life and physical activity. This is highly significant since people aged 55–64 years usually demonstrate the first symptoms of body aging, involution of performance skills, or sexual problems. All of them can have a negative impact on one’s functioning in society, interpersonal relations, or fulfilment of professional duties. In the SD, physical activity can play both the preventive and therapeutic roles. Authors have confirmed the positive impact of physical activity on prevention or treatment of occupational burnout.61 Dȩbska and Mazurek37 also showed that physically active people can positively influence one’s future and career concerns. The positive effects of physical activity on the SD were also noted by Guimarães and Baptista39 and Krzepota et al.34

So far there have been very few studies investigating positive relationships between quality of life in its ED and physical activity. Some authors point to higher levels of physical activity among individuals with enough leisure time or with sufficient material resources62 as components of quality of life in its ED. An earlier study by one of the authors of the present work63 showed that having leisure and taking advantage of leisure opportunities constitute one of the most important determinants of quality of modern life.

A strong point of the present study is the comprehensive assessment of quality of life in older working-age people. Earlier studies usually focused on pre- or post-working age populations; a few were concerned with Poland or other countries of Central Europe. The high dynamics of social and economic changes related to the transformation from centrally planned to free market economy and gradual convergence with the most highly developed countries makes this part of Europe an interesting research area. The study also used novel methodology of data analysis regarding the GQOL index.

A drawback of the present study is its spatial limitation to one city only. Prospective research must cover the whole of Poland and other countries of Central Europe. Another limitation of the study is its cross-sectional character. Prospective continuous surveys will allow a systematic analysis of physical activity levels and their relationships with the quality of life of Wrocław residents as well as identify certain tendencies that may occur with age. The use of the short IPAQ version in the study confined the analysis of physical activity to a weekly basis only. In future, researchers should make use of tools allowing measurements of physical activity in different areas of life, eg, leisure, professional work, during moving, or performing domestic chores as well as examining the forms of performed physical activity. According to Valadares et al,64 the relationships between quality of life and physical activity may be different in different domains. In addition, a certain shortcoming of the study could have been the examination of an entire older working-age population sample of Wrocław regardless of their sex, education, occupation, or income. The significance of these socioeconomic determinants of quality of life was highlighted by Chen et al.2

Conclusion

The results of the present study confirm positive relationships between physical activity and quality of life in senior working-age people. The study revealed that the level of physical activity did have an impact on different domains of quality of life of the examined population. Previous studies failed to provide such unambiguous results, especially in the SD and ED. An original conclusion from the study is the increased odds of high assessment of perceived GQOL together with higher levels of physical activity. Undertaking physical activity by senior citizens has preventive and therapeutic effects, and it improves the quality of their life as compared with their physically less active counterparts. Since quality of life improvement is one of key objectives in the development strategy of many countries and regions, all related planned tasks should also focus on improvement of physical activity. Important locations for implementation of such tasks, especially in relation to older working-age people, are their places of employment, which could provide leisure facilities or bicycle storage rooms, organize recreational activities, promote disease-prevention programs for employees and their families, or perhaps, sponsor amateur sports clubs that company employees could join.

Disclosure

The authors report no conflicts of interest in this work.


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