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Article

Walking in Natural Environments as Geriatrician’s Recommendation for Fall Prevention: Preliminary Outcomes from the “Passiata Day” Model

by
Giuseppe Battaglia
1,2,
Valerio Giustino
1,3,
Giuseppe Messina
1,4,*,
Mariangela Faraone
5,
Jessica Brusa
1,
Anna Bordonali
5,
Mario Barbagallo
5,
Antonio Palma
1,2,6 and
Ligia-Juliana Dominguez
5
1
Department of Psychology, Educational Science and Human Movement, University of Palermo, Via Giovanni Pascoli, 6, 90144 Palermo, Italy
2
Sport and Exercise Sciences Research Unit, University of Palermo, Via Giovanni Pascoli, 6, 90144 Palermo, Italy
3
PhD Program in Health Promotion and Cognitive Sciences, University of Palermo, Via Giovanni Pascoli, 6, 90144 Palermo, Italy
4
Posturalab Italia Research Institute, Via Santicelli 4, 90131 Palermo, Italy
5
Geriatric Unit, Department of Internal Medicine and Geriatrics, University of Palermo, Via del Vespro, 129, 90127 Palermo, Italy
6
Regional Sports School of CONI Sicilia, Sicily, Italy, Via Emanuele Notarbartolo, 1/G, 90141 Palermo, Italy
*
Author to whom correspondence should be addressed.
Sustainability 2020, 12(7), 2684; https://0-doi-org.brum.beds.ac.uk/10.3390/su12072684
Submission received: 7 February 2020 / Revised: 23 March 2020 / Accepted: 23 March 2020 / Published: 29 March 2020
(This article belongs to the Special Issue Physical Education, Exercise, and Sport for a Sustainable Environment and Lifestyle)
Browse Figure
Versions Notes

Abstract

:
Background: The Geriatric Unit of the University of Palermo developed the “Passiata Day” model, a green exercise intervention consisting of a one-hour walk, once/week, in a city park. The purpose of this study was to assess body balance in older people who walked regularly compared to sedentary people. Methods: 106 older people (75 women and 31 men; mean age: 72.3 ± 8.2 years) without fall history were invited to participate voluntarily in this natural environment walking program. After six months, both the participants who had taken part regularly in the walk (i.e., the physical activity group (PAG; n = 72; 54 women and 18 men; mean age: 70.7 ± 7.2 years)), and who had not accepted to be included in the outdoor walking program (i.e., the sedentary group (SG; n = 34; 21 women and 13 men; mean age: 75.5 ± 9.4 years)), performed a stabilometric test with open eyes (OE) and with closed eyes (CE). Results: Our preliminary results showed significant differences between groups on the ellipse sway area both in the OE (p < 0.05) and in CE condition (p < 0.01). Moreover, we found a significant difference on sway along the frontal plane both in the OE (p < 0.05) and in the CE condition (p < 0.01), and on sway along the sagittal plane for the test with CE (p < 0.01). Conclusion: Based on our preliminary findings, we suggest that walking regularly in an outdoor setting could lead to a greater body balance in older people and could be recommended by geriatricians for preventing the risk of falls. The next step will be to investigate the effect of an experimental outdoor walking program structured in terms of intensity, frequency and volume.

1. Introduction

Falls, defined as the events in which people inadvertently lose vertical status coming down to rest on the ground, represent the second highest cause of death in the world among incidents and are an important problem for older people [1,2]. According to the World Health Organization, each year, the percentage of people aged 65 to 69 years who fall is between 28 and 35, and from 32 to 42% among older people over 70 years of age [1]. As reported by a former study by Lord et al., approximately one-third of people aged 65 years and over experience at least one episode of falling each year [3].
The scientific literature reported that fall-related risk factors in older people can be classified into intrinsic and extrinsic factors. The latter regard the environmental conditions as lighting, the floor and the type of footwear [4]. Concerning the intrinsic factors, they include age-related hearing/visual loss, vestibular failure and musculoskeletal impairments [5]. The functional decay of organs for sight and hearing as well as of the musculoskeletal system leads to a worsening of postural control and an alteration of body balance, increasing the risk of falling in old age [6]. As body balance, namely the ability to control the displacement of the body’s center of mass (CoM), depends on the interaction of information from these organs integrated by the central nervous system (CNS), the physiological decline as well as the pathological conditions of one or more of these systems produces a substantial alteration of static body balance, dynamic postural control and gait patterns, causing a high risk of falls, particularly in older individuals [7,8,9].
Moreover, it is well-known that falls are a common and potentially relevant health risk in older people causing a high rate of morbidity and mortality [10,11]. The epidemiology of these accidental episodes in older people and their complications are various and can require medical treatment or, in the most serious cases, hospitalization [10]. In particular, among older adults, more than 50% of these episodes require hospitalizations, implementing fall-related costs for health public systems [12]. For these reasons, fall prevention interventions are a priority for public health systems in order to reduce fall-related high costs, sensitize people on health programs benefits, and improve life quality [13,14].
It is widely recognized that, among the interventions in older people, physical activity programs have shown beneficial effects on mental health as well as physical features, including an increase on body balance ability, a fundamental characteristic in order to prevent falls [15,16,17]. Studies aiming to examine and compare the effects of exercise on falls prevention should consider the characteristics of physical activity programs in terms of intensity, frequency and volume, as well as the training setting (e.g., supervised vs. unsupervised training, group exercise intervention vs. individual training, home exercise program vs. structured physical activity program vs. leisure-time physical activity, indoor vs. outdoor setting) [12,18,19,20,21,22,23]. Among the key topics addressed in a recent review, focused on the fall prevention in elderly, was included the role of outdoor training providing an interesting contribution on fall-reducing effects in elderly of this latter training setting [22]. Indeed, although a number of different convincing evidence emphasize the potential benefits of practicing physical exercise in natural environments in a wide range of physical and psychological hallmark [24,25,26], the contribution of this seminal review is considerable since Karlsson et al. reported that elderly who walk outdoors with technical shoes encounter a reduction of fall risks [22]. Regarding the types of exercise, although the literature is in agreement that balance exercises would seem to be the most effective, some authors have investigated the role of endurance, resistance training or walking programs on the reduction in the fall risk and on fall rates in healthy older adults as well as in those at risk of falling reporting conflicting results [12,27,28,29]. As concern walking plans, it is well known that this type of physical activity is able to induce benefits of a multitude of physical fitness parameters, including posture, in young people as well as in older adults [30]. However, Sherrington et al. showed that walking significantly increased falls in elderly at risk of falling and with different history of falling [12], while Okubo et al. reported a significant reduction of fall risk with brisk walking with respect to balance and strength training among healthy older people living in the community [31].
Walking is a healthy activity characterized by a simple structure and easy accessibility with no need of sports background, representing the most natural form of exercise [32]. In agreement with several studies in the literature, which found neuromuscular modifications depending on long-term regular walking training in active participants compared with sedentary ones [33,34], we hypothesize that a light physical activity, like an outdoor walking experience, could positively affect body balance in older people in a similar way. Therefore, the purpose of this study was to evaluate the effects of a no-structured six-month regular walking in a natural environment on body balance and postural control strategies in a sample of older adults without fall history.

2. Materials and Methods

2.1. Study Design and Participants

An unrandomized, comparative, retrospective hospital-based case study was adopted for the research. The recruitment, conducted by the geriatrician of the Department of Internal Medicine and Geriatrics of the University Hospital of Palermo (Italy), took place at the geriatric ambulatory clinic of the same institution, during the year 2017 as part of a fall prevention and health promotion program. The participants were invited to participate voluntarily in the “Passiata Day” model, an initiative of this department that provided a one-hour walk once a week in a park of Palermo city, during which subjects were asked to walk in a group maintaining a leisurely pace. This outdoor walking plan was guided by a graduate in physical education and a geriatrician. The patients were deemed suitable for the study if they met the following inclusion criteria: sedentary lifestyle and physically inactive [35]; no history of falling; absence of musculoskeletal injury, cognitive disables, and/or hearing impairment. In order to establish the compatibility with the inclusion criteria, information collection was recorded using a questionnaire to which participants were asked to respond by interview. Based on the aforementioned inclusion criteria, 106 older people with an age range from 60 to 90 years (75 women and 31 men; mean age: 72.3 ± 8.2 years; height: 159.4 ± 12.6 cm; weight: 70.5 ± 16.7 kg) were eligible for the study, but only 72 participants (Physical activity group (PAG); 54 women and 18 men; mean age: 70.7 ± 7.2 years; height: 160.4 ± 7.4 cm; weight: 70.4 ± 13.9 kg) accepted following the outdoor walking plan. The subjects have not provided indications of changing their usual physical activity. In order to participate in the study all participants provided a signed informed consent form. The study was developed in accordance with the Declaration of Helsinki regarding the criteria for the participation of persons in research and approved by the Ethical Board of the University of Palermo.

2.2. Data Collection

Six-months after the beginning of the outdoor walking program, a group of researchers of the Sport and Exercise Sciences Research Unit of the same university evaluated body balance of the participants who had accepted the geriatrician recommendation to walk regularly in the “Passiata Day” model for this period (PAG) and of the participants who had not taken part in this outdoor walking plan (Sedentary group (SG); 21 women and 13 men; mean age: 75.5 ± 9.4 years; height: 157.3 ± 19.6 cm; weight: 70.9 ± 21.6 kg).

2.3. Anthropometric Measurements

The anthropometric measurements were recorded with the participants wearing only undergarments. Body weight was assessed using a Seca electronic scale (maximum weight recordable: 300 kg; resolution: 100 g; Seca, Hamburg, Germany). Height was determined using a standard stadiometer (maximum height recordable: 220 cm; resolution: 1 mm). Body mass index (BMI) was calculated indirectly as body weight divided by height squared (kg/m2).

2.4. Stabilometric Evaluation

It is widely recognized in the scientific literature that the stabilometric test provides valid outcomes that allows prediction of the risk of falling in elderly with and without fall history [36]. For this reason, in order to assess body balance, all participants of both groups performed a stabilometric evaluation and repeated the test under two different conditions: with open eyes (OE) and with closed eyes (CE) using the freeMed® platform and the freeStep® software v.1.6.007 (Sensor Medica®; Guidonia Montecelio, Roma, Italia) and sampling real time postural sway at 50 Hz. In accordance with the Romberg test, participants were required to stay barefoot in an orthostatic position with the head in neutral position for 51.2 seconds with feet placed side-by-side forming an angle of 30° and both heels 4 cm apart [37]. We considered the following parameters of the center of pressure (CoP) for statistical analysis: sway path length (SPL) of the CoP; ellipse sway area (ESA) of the CoP; CoP coordinates along the frontal (ΔX; X-mean) and sagittal (ΔY; Y-mean) planes (Figure 1).

2.5. Statistical Analysis

Statistical analysis was performed using Statistica software v.12 (StatSoft®, TIBCO® Software Inc, Palo Alto, CA, USA). All data are presented as means ± standard deviations with the alpha level set at p < 0.05 to be considered statistically significant. Normality of the data distribution was tested using the Kolmogorov–Smirnov test. Differences between groups were computed via unpaired Student’s t-test and the homogeneity of variances was verified by the Levene’s test (F). Furthermore, the Cohen’s d was calculated using G*Power software v.3.1.9.2 (Heinrich Heine University, Düsseldorf, Germany) and we interpreted the magnitude of the effect size considering the criterions reported by Cohen (small effect: ≥ 0.2, medium effect: ≥ 0.5, large effect: ≥ 0.8) [38].

3. Preliminary Results

Data investigations revealed a normal distribution of variance. Comparing the two groups (i.e., PAG vs. SG), our results showed significant differences on the ESA stabilometric parameter in both the OE and CE conditions. In particular, we found a significant lower mean value of ESA in the PAG respect to the SG for the stabilometric test with OE condition (p = 0.04), as well as for the CE condition (p = 0.008), as reported in Table 1 and Table 2. Moreover, we observed a significant difference between the groups on ΔX in both tests (respectively p = 0.04 for the OE condition and p = 0.001 for the CE condition) and on ΔY for the evaluation with CE (p = 0.009). Furthermore, although not statistically significant, the PAG showed lesser values compared to the SG for all the other parameters (p > 0.05) both in the trial with CE and with OE.

4. Discussion

4.1. Walking to Prevent/Reduce Falls in Older People

Evidence of the effectiveness of exercise interventions for the prevention of falls in older adults is well known in the scientific literature [39,40]. Among the physical activity interventions, walking exercise, individualized in intensity, duration and frequency, can be practiced safely by everyone except for disabled people [30]. For these reasons, keeping in mind that the lack of the initial assessment did not allow evaluation of the within-group effect of the walking plan, the aim of this study was to examine body balance, measured by stabilometric test, in a group of older adults who had walked regularly for six months in a natural environment compared to a sedentary group. Although significant differences between groups were found on CoP coordinates along the frontal plane both with OE and in CE (p < 0.05 and p < 0.01 respectively), and on CoP coordinates along the sagittal planes for the evaluation with CE (p < 0.01), the main finding of the present study was that PAG showed a significant difference on the ellipse sway area in the test with OE (p < 0.05) as well as for the CE condition test (p < 0.01) compared to the sedentary group. Comparisons between groups showed lower values in the PAG with respect to the SG in all other parameters of the CoP in the CE condition test, as well as in the assessment with OE that did not reach statistical significance.
Based on our preliminary findings, we suggest that, in a group of healthy older people a light physical activity, even if not structured (in terms of intensity, frequency and volume), like an outdoor walking plan, could lead to a greater body balance. Lee et al. reported the positive influence of walking on chronic diseases (e.g., cardiovascular disease, hypertension, diabetes, osteoporosis, obesity), as well as on disorders as anxiety or depression, recommending this physical activity as an important therapeutic strategy for patients [32]. In addition to these known benefits, a review by Morris et al. reported that walking programs may induce improvements in posture [30]. Whereas many authors agree that balance training seems to be the most suitable for preventing the risk of falls, conflicting results were reported in the scientific literature concerning the effectiveness of walking [41,42,43]. It is fundamental to consider if older people enrolled in the studies are healthy, as in our study, or at risk of falling. Indeed, though walking represents the most simple structure of physical activity and healthy people should be encouraged to walk as much as possible, we suggest, in agreement with Gillespie et al., that due to the possibility of stumbling or slipping inherent in this activity, walking should not be recommended in the elderly at risk of falling [28]. Other authors had previously investigated the usefulness of walking plans on fall reduction, either as a unique exercise training or combined in a protocol of different types of exercise [31,44]. Okubo et al. reported that in older adults with no risk of falling walking improved body balance and as a result was useful in order to prevent falls [31].

4.2. Walking in Natural Environments

In an attempt to explain the greater body balance found in the PAG in our preliminary outcomes, we hypothesize that walking in the park, due to the irregular ground, stimulated the foot more than a solid surface, which could have increased the ability of the walkers to respond to an unstable surface similarly as a proprioceptive training [45]. Moreover, we assume that walking in a natural environment without constraints related to speed and at a favorable gait is advantageous for older people. Our preliminary results are further supported by a study of Row Lazzarini et al., in which the authors reported that treadmill walking is problematical for older people [46]. Furthermore, as evidenced in the literature, green exercise, such as walking or running, seems to be associated with positive effects on many physical and cognitive features [47], and, in keeping with our preliminary results, Karlsson et al. have found that walking outdoor with anti-slip shoe devices is effective in reducing the risk of fall in the elderly [22]. Nevertheless, it is noteworthy that recently several researches confirmed the importance to advise against walking as an activity for people at risk of falls or with a history of falling, but they underline the fundamental role of physical activity in order to reduce fall rates in old age [48,49].

4.3. Strengths and Limitations of the Study

The present study has clarified that healthy older people who walk regularly show greater body balance than age-matched sedentary people. The main strength of our study is the great advantage of this exercise intervention, that is the easiness in terms of accessibility. Moreover, our main content is promoting the practice of a simple and no-structure light physical activity in an outdoor environment as a possible approach that could lead to greater body balance in older people for preventing the risk of falls.
However, the principal limitation of the current study is that it does not include postural assessment prior to the walking plan, which precludes assessing the within-group effect of this exercise intervention.
From a practical point of view, this investigation promotes the potential effect of walking on preventing falls in elderly people without history of falls. As such, our study did not provide information on the role of walking in elderly people with a history of falls, and for this reason our results should be interpreted considering this population context and should not be generalized.
In summary, this research has emphasized that walking could lead to a greater static body balance in elderly people without history of falls, and for this reason further studies are needed to examine, firstly, the effect of walking on elderly people with a history of falls and, subsequently, on dynamic body balance and walking pattern for both elderly populations (i.e., non-fallers and fallers).

4.4. Conclusions

Based on these preliminary outcomes, we suggest that walking regularly in an outdoor setting, as done for the “Passiata Day” model, could be recommended from geriatricians in order to help prevent the risk of falls in older people. Our preliminary findings need further research in order to confirm the hypothesis that a leisure-time physical activity such as walking regularly in a naturals environment could be an intervention that induces a greater body balance and consequently prevent the risk of falls in healthy older people (e.g., comparing a walking plan in different environments like outdoor vs. indoor vs. treadmill). Moreover, given the preliminary findings of our study on the benefits of a no-structured outdoor walking plan for the elderly, the next step will be to investigate the effect of an experimental outdoor walking program structured in terms of intensity, frequency and volume based on previous researches and guidelines [50,51,52,53]. It is recommended that these outdoor walking programs are carried out in a group, as recent research has showed that physical activity as part of a group is associated with higher enjoyment levels and higher levels of activity [54].

Author Contributions

Conceptualization, L.-J.D., A.P., M.B.; Methodology and Study Design, G.B.; Data Collection, M.F., J.B., A.B.; Data Analysis, V.G.; Data Interpretation, G.B. and G.M.; Writing – Original Draft Preparation, V.G.; Writing – Review & Editing, G.B.; Visualization, L.-J.D. and G.M.; Project Administration, A.P. and M.B. All authors have read and agreed to the published version of the manuscript.

Funding

The authors declare no funding received.

Conflicts of Interest

The authors declare no conflict of interest.

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Sustainability 12 02684 g001 550
Figure 1. Statokinesigram of the stabilometric test. In green, test with open eyes (OE); in red, test with closed eyes (CE).
Figure 1. Statokinesigram of the stabilometric test. In green, test with open eyes (OE); in red, test with closed eyes (CE).
Sustainability 12 02684 g001
Table
Table 1. Values of CoP coordinates on stabilometric test with open eyes (OE) in both groups (SG vs. PAG).
Table 1. Values of CoP coordinates on stabilometric test with open eyes (OE) in both groups (SG vs. PAG).
SGPAGp Value|MD|t ValueF(1,104)p LeveneCohen’s d
ESA (mm2)166.19 ± 191.04109.9 ± 85.710.0456.29−2.111.260.0010.38
SPL (mm)494.94 ± 122.13484.6 ± 142.87n.s.10.35−0.360.61n.s.0.08
ΔX (mm)14.32 ± 8.511.52 ± 5.120.042.8−2.119.950.0020.4
ΔY (mm)15.28 ± 8.113.46 ± 6.83n.s.1.82−1.20.82n.s.0.24
X-mean (mm)−4.28 ± 9.35−2.77 ± 10.06n.s.1.510.740.67n.s.0.16
Y-mean (mm)−11.2 ± 8.37−11.5 ± 9.45n.s.0.3−0.161.26n.s.0.03
Legend: CoP, Center of Pressure; SG, Sedentary Group; PAG, Physical Activity Group; MD, Mean Absolute Difference; ESA, Ellipse Sway Area; SPL, Sway Path Length; ΔX and X-mean, Right and Left Sway; ΔY and Y-mean, Forward and Backward Sway; n.s., non-significant.
Table
Table 2. Values of CoP coordinates on stabilometric test with closed eyes (CE) in both groups (SG vs. PAG).
Table 2. Values of CoP coordinates on stabilometric test with closed eyes (CE) in both groups (SG vs. PAG).
SGPAGp Value|MD|t ValueF(1,104)p LeveneCohen’s d
ESA (mm2)221.08 ± 360.4892.04 ± 125.440.008129.03−2.7216.260.00010.48
SPL (mm)575.61 ± 167.82537.9 ± 158.86n.s.37.7−1.120.01n.s.0.23
ΔX (mm)15.28 ± 10.019.97 ± 6.190.0015.31−3.3512.590.00060.64
ΔY (mm)18.35 ± 14.0612.71 ± 7.70.0095.64−2.6712.910.00050.5
X-mean (mm)−2.82 ± 7.77−1.37 ± 10.51n.s.1.450.722.3n.s.0.16
Y-mean (mm)−13.43 ± 9.18−10.13 ± 7.99n.s.3.31.890.89n.s.0.38
Legend. CoP, Center of Pressure; SG, Sedentary Group; PAG, Physical Activity Group; MD, Mean Absolute Difference; ESA, Ellipse Sway Area; SPL, Sway Path Length; ΔX and X-mean, Right and Left Sway; ΔY and Y-mean, Forward and Backward Sway; n.s., non-significant.

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Battaglia, G.; Giustino, V.; Messina, G.; Faraone, M.; Brusa, J.; Bordonali, A.; Barbagallo, M.; Palma, A.; Dominguez, L.-J. Walking in Natural Environments as Geriatrician’s Recommendation for Fall Prevention: Preliminary Outcomes from the “Passiata Day” Model. Sustainability 2020, 12, 2684. https://0-doi-org.brum.beds.ac.uk/10.3390/su12072684

AMA Style

Battaglia G, Giustino V, Messina G, Faraone M, Brusa J, Bordonali A, Barbagallo M, Palma A, Dominguez L-J. Walking in Natural Environments as Geriatrician’s Recommendation for Fall Prevention: Preliminary Outcomes from the “Passiata Day” Model. Sustainability. 2020; 12(7):2684. https://0-doi-org.brum.beds.ac.uk/10.3390/su12072684

Chicago/Turabian Style

Battaglia, Giuseppe, Valerio Giustino, Giuseppe Messina, Mariangela Faraone, Jessica Brusa, Anna Bordonali, Mario Barbagallo, Antonio Palma, and Ligia-Juliana Dominguez. 2020. "Walking in Natural Environments as Geriatrician’s Recommendation for Fall Prevention: Preliminary Outcomes from the “Passiata Day” Model" Sustainability 12, no. 7: 2684. https://0-doi-org.brum.beds.ac.uk/10.3390/su12072684

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