Physical & Occupational Therapy in Geriatrics, 29(2):126–135, 2011
C 2011 by Informa Healthcare USA, Inc.
Available online at http://informahealthcare.com/potg
DOI: 10.3109/02703181.2011.569053
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The Effects of the Nintendo Wii Fit on
Community-Dwelling Older Adults with Perceived
Balance Deficits: A Pilot Study
Emily Bainbridge, Sarah Bevans, Brynne Keeley, & Kathryn Oriel
Department of Physical Therapy, Lebanon Valley College, Annville, Pennsylvania, USA
ABSTRACT. The purpose of this study was to determine if a 6-week intervention program using the Nintendo Wii Fit Balance Board would lead to improvements in balance in community-dwelling older adults over the age of 65 with a perceived balance
deficit. Balance, balance confidence, and limits of stability were measured at preintervention and postintervention using the Berg Balance Scale (BBS), Activities-specific
Balance Confidence Scale, and the Multi-Directional Reach Test, respectively. The center of pressure excursion was calculated by the Wii Balance Board. The intervention
consisted of 30-min sessions, 2×/week using the Balance Board. No statistically significant changes were found for any outcome measure, although 4 of the 6 participants
demonstrated clinically significant improvements on the BBS, using established clinical guidelines. These findings suggest that an intervention program including the Wii
fit may be an effective rehabilitation option for older adults with perceived balance
deficits.
KEYWORDS.
Nintendo Wii Fit, balance, older adults, fall risk
INTRODUCTION
According to the 2009 Census Bureau, 12.6% of the United States population is
over the age of 64. Of those who are community dwelling, almost one third experiences a fall each year (Centers for Disease Control [CDC], 2005). Fifty-five to sixty
percent of those who have fallen are fearful of falling (Howland et al., 1998; Maki,
Holliday, & Topper, 1991; Niino, Tsuzuku, Ando, & Shimokata, 2000), while 46%
of elderly adults who have never fallen also report a fear of falling (Tinetti, Mendes
de Leon, Doucette, & Baker, 1994; Walker & Howland, 1991). This fear of falling
may be justified given that falls are one of the leading causes of accidental death
in this population (CDC, 2005). While there are many contributing factors to the
increased fall risk in older adults (Hughes et al., 2001), impaired balance is a major,
Received 2 December 2010; accepted 2 March 2011.
Address correspondence to: Dr. Kathryn Oriel, PT, EdD, Department of Physical Therapy, Lebanon Valley
College, 101 N. College Avenue, Annville, Pennsylvania 17003, USA (E-mail: oriel@lvc.edu).
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Effects of Nintendo Wii Fit on Older Adults
127
modifiable risk factor that can improve with training (Boyd, Vidoni, & Siengsukon,
2008; Tunney et al., 2003).
Historically, interventions for the examination and treatment of balance have
included high-cost force plate and virtual reality systems in clinical settings (Gras,
Hummer, & Hine, 2009; Shubert, 2010).
Recently, owing to its low cost, ease of use, and portability, the Nintendo Wii is
being used in physical therapy clinics and skilled nursing facilities as a popular substitute for the expensive and complicated force plates to improve dynamic strength
and balance. Despite its growing popularity, the Nintendo Wii’s validity and reliability as an intervention tool is still being investigated. According to Clark et al. (2009),
the Wii established excellent test–retest reliability (ICC 0.66) when assessing path
length, a measure of deviation from the center of pressure, and demonstrated excellent concurrent validity (ICC 0.77–0.89) when comparing the Wii Balance Board
with a laboratory-grade force plate.
While the gaming system is commonly used in the clinical setting, little research
exists on using the Nintendo Wii Fit as an intervention for improving static and
dynamic balance (Bomberger, 2010; Brown, Sugarman, & Burstin, 2009; Pigford &
Andrews, 2010; Shih, Shih, & Chiang, 2010; Shih, Shih, & Chu, 2010). Three studies
addressed the Wii as a tool to improve balance deficits in older adults (Bomberger,
2010; Brown et al., 2009; Pigford & Andrews, 2010). Brown et al. (2009) described
the case of an 86-year-old female following a stroke who used the Wii as part of her
rehabilitation program. The patient demonstrated a 10-s improvement in Timed
Up and Go, improved anterior–posterior stance symmetry, and a 3-point increase in
Berg Balance Score (BBS) with standard physical therapy and four training sessions
with the Wii Fit system.
A similar case report performed by Pigford and Andrews (2010) with an 87-yearold male with a history of multiple falls showed a 12-point increase in the BBS, a 15-s
decrease in Timed Up and Go, a 6% increase in Activities-specific Balance Confidence (ABC) Scale, and a 62% increase in gait speed after 10 sessions of Wii Fit
balance games and other therapeutic interventions. Although these case reports described a significant improvement in balance, it is difficult to attribute these changes
directly to the Wii Fit since it was not the only intervention performed. A case series by Bomberger (2010) used the Wii Fit balance games as the sole intervention
in 14 individuals over 65 years of age with and without balance deficits. Significant
improvements in balance between pretesting and posttesting were found in 7 of the
14 outcome measures used.
Given the growing trend of virtual reality use in the clinical setting, and its potential importance in improving balance in older adults, the purpose of this pilot
study was to investigate the effects of the Nintendo Wii Fit as an intervention in improving balance, balance confidence, and limits of stability in community-dwelling
adults over 65 years old.
METHOD
This study was approved by the institutional review board at Lebanon Valley College. All participants signed an informed consent form prior to the start of the study.
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Bainbridge et al.
Design
This prospective, cross-sectional pilot study employed a pretest–posttest design
(Jewell, 2008).
Participant Recruitment
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Eight participants were recruited through flyers posted in a college sports center
in the spring of 2010. In order to participate in the study, individuals had to be
community-dwelling older adults over the age of 65 with a perceived decline in
balance.
Outcome Measures
Four outcome measures were used to assess balance, balance confidence, and limits
of stability including the BBS, ABC, Multi-Directional Reach Test (MDRT), and
center of pressure (COP) excursion measurements. Each test was administered by
the same designated examiner with standardized directions.
In addition to the balance assessments, all participants completed a health history form. Seated bilateral ankle dorsiflexion passive range of motion measurements with knees flexed and extended were obtained during week 3 of the study
secondary to compensatory strategies observed by the researchers.
Intervention
The intervention consisted of 30-min sessions 2×/week for 6 weeks using the Wii Fit
Balance Board. Each treatment session began and ended with 5 min of yoga poses,
Half-moon as a warm-up and Warrior as a cooldown [Figures 1(a) and (b)]. Weeks
1–2 included soccer heading, ski jump, ski slalom, and table tilt. Weeks 3–4 included
soccer heading, ski slalom, tightrope walk, and table tilt. Weeks 5–6 included penguin slide, ski slalom, tightrope walk, and table tilt. All games were played in the
respected order for 5 min per game. Two 1-min seated breaks were allotted at the
same time interval in each session. Active training time was measured using a stopwatch to avoid inaccuracy of the Wii timekeeping system.
Data Analysis
Results were analyzed in IBM SPSS Statistics 17.0 for Windows. The Wilcoxon
signed-rank test was used to compare means at pretesting and posttesting for all
outcome measures. This nonparametric test was chosen because the parametric assumptions of normality and homogeneity were not met (Jewell, 2008). A significance level of p < 0.05 was established. Results were also compared to established
minimal detectable change (MDC) scores for the BBS (Berg, Wood-Dauphine,
& Williams, 1995; Stevenson, 2001), ABC (Shumway-Cook, Baldwin, Polissar, &
Gruber, 1997), and MDRT (Steffen & Seney, 2008). MDC scores were not available
for right and left sidebending and COP excursion. MDC values are used to determine whether change during or after intervention represents meaningful change or
are a result of error (Steffen & Seney, 2008).
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Effects of Nintendo Wii Fit on Older Adults
FIGURE 1. (a) Ski slolam. (b) Half-moon yoga pose.
RESULTS
Participant Characteristics
Eight participants were initially recruited for this study. The participants in this
study, which included 7 females and 1 male, had a mean age of 75 ± 9.7 years. One
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Bainbridge et al.
TABLE 1. Participant Characteristics
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Participant
1
2
3
4
5
6
7
8
Age
Gender
No. of
Prescribed
Meds
74
69
68
65
87
87
80
67
M
F
F
F
F
F
F
F
1
0
4
8
1
0
3
2
No. of
Chronic
Health
Conditions
Assistive
Device
Falls Within 1
Year
0
2
0
5
3
0
3
2
None
None
None
None
SPC
None
None
None
None
1
None
5
None
None
1
None
of the 8 participants used an assistive device, while 2 of the 8 reported a history of
falls. Table 1 describes the participant demographics.
Of the initial 8 participants, 2 participants withdrew from the study secondary
to reports of an exacerbation of preexisting hip osteoarthritis and an increase in
preexisting low back pain. Owing to their early withdrawal from the study, these
participants were not included in the data analysis.
Outcomes
Berg Balance Scale
Four of the 6 participants improved in the BBS from pretesting to posttesting. These
findings were not statistically significant (p = 0.066). The MDC value for the BBS is
5 points (Berg et al., 1995). One participant improved greater than 5 points on the
BBS. According to the model established by Shumway-Cook et al. (1997), a 1-point
increase in the BBS in individuals with scores between 46 and 54 indicates a 6%
decrease in fall risk. Three participants decreased their fall risks by 6%–12%.
Activities-specific Balance Confidence Scale
Three of the 6 participants improved in the ABC from pretesting to posttesting.
These findings were not statistically significant (p = 0.753). None of the participants
improved greater than the MDC value for the ABC, which is 18% (Steffen & Seney,
2008).
Multi-Directional Reach Test
Forward Bending. Three of the 6 participants improved in forward bending from
pretesting to posttesting. These findings were not statistically significant (p = 0.588).
None of the participants improved by the MDC value for forward bending of the
MDRT, a 9-cm change (Lim, van Wegen, & de Goede, 2005; Smithson, Morris, &
Iansek, 1998).
Backward Bending. Two of the 6 participants improved in backward bending
from pretesting to posttesting. These findings were not statistically significant (p =
0.500). None of the participants improved by the MDC value for backward bending
of the MDRT, a 7-cm change (Lim et al., 2005; Smithson et al., 1998).
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Effects of Nintendo Wii Fit on Older Adults
131
FIGURE 2. The mean scores of outcome measures at pretesting and posttesting.
Right Sidebending. One of the 6 participants improved in right sidebending from
pretesting to posttesting. These findings were not statistically significant (p = 0.465).
A MDC value does not exist for lateral bending.
Left Sidebending. One of the 6 improved in left sidebending from pretesting to
posttesting. These findings were not statistically significant (p = 0.465). A MDC
value does not exist for lateral bending.
COP Excursion Measurement
Three of the 6 participants improved in the COP excursion from pretesting to
posttesting. These findings were not statistically significant (p = 0.075). There is
no MDC value for COP excursion.
The mean scores of outcome measures at pretesting and posttesting are displayed
in Figure 2, while the Wilcoxon signed-rank test results and p values are displayed
in Table 2.
DISCUSSION
While changes in the BBS scores were not statistically significant from pretesting to posttesting, the results approached significance (p = 0.066). Four of the 6
TABLE 2. Summary of Results
Data
ABC
Berg
MDRT forward bending
MDRT backward bending
MDRT right lateral bending
MDRT left lateral bending
COP right
COP left
Wilcoxon Signed-Rank Test
Z
p
−0.314
−1.841
−0.542
−0.674
−0.730
−0.730
−1.782
−1.782
0.753
0.066
0.588
0.500
0.465
0.465
0.075
0.075
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Bainbridge et al.
participants’ scores demonstrated a decrease in fall risk according to either the
MDC value (Berg et al., 1995) or the model established by Shumway-Cook et al.
(1997). Five of the 6 participants achieved a posttesting BBS score above the established fall risk cut-off score of 49 (Shumway-Cook et al., 1997). These findings are
consistent with the results by Bomberger (2010) who found improvements in the
BBS after a 6-week intervention using the Wii Fit. These findings were also consistent with case reports described in the literature (Brown et al., 2009; Clark &
Kraemer, 2009; Pigford & Andrews, 2010). The lack of significant BBS improvements may have been due to a ceiling effect on the test, as 4 of the 6 participants’
pretest BBS scores were greater than 49 (Shumway-Cook et al., 1997).
Statistical significance was not found with the ABC (p = 0.753), but improvements in balance confidence were noted in 3 of the 6 participants. These findings
are similar to the case study results found by Clark and Kraemer (2009) and Pigford
and Andrews (2010) who also did not reach MDC values of the ABC with improvements of 2% and 6% respectively. After viewing the pretesting and posttesting
ABC scores, it was hypothesized that those participants who decreased in balance
confidence may have done so due to recognition of balance limitations that were
discovered through the Wii interventions. Cognitive deficits and misunderstandings of the ABC scale may also have led to inaccurate completion of the outcome
measures.
Statistical significance was not observed with the MDRT in forward bending
(p = 0.588), backward bending (p = 0.500), and right and left sidebending (p = 0.465
and 0.465 respectively). Three of the 6 participants improved in forward bending
excursion; however, none of the participants met the MDC value of a 9-cm improvement (Lim et al., 2005; Smithson et al., 1998). This is consistent with literature by
Brown et al. (2009) whose case study findings reported a forward bending increase
by 3 cm after four training sessions with the Wii Fit system accompanied by balance
training. Two of the 6 participants improved in backward bending excursion. None
of the participants met the MDC value of 7-cm improvement. One participant improved in right sidebending excursion and one in left sidebending excursion. No
MDC values exist for lateral bending, although achievement of symmetry is desired (Newton, 2001). One participant achieved equal left and right sidebending
symmetry at posttesting. Our results are consistent with Brown et al. who found a
3-cm improvement in right sidebending excursion and a 1-cm improvement in left
sidebending excursion.
While the COP excursion results were not statistically significant, the results approached significance for left and right COP excursion (p = 0.075 and 0.075 respectively). Three of the 6 participants increased their right and left COP symmetry
indicating more equal weight bearing between extremities. Although there is no
MDC value for COP excursion, the percentage of weight bearing between extremities should be equal (Nichols, 1997).
Throughout the first 3 weeks of the study, researchers observed excessive use
of the hip strategy for balance correction (Horak & Nashner, 1986). It was hypothesized that this may be due to decreased ankle dorsiflexion range of motion;
therefore, ankle passive range of motion was measured during week 3. These measurements indicated that 4 participants lacked functional bilateral ankle dorsiflexion with knees flexed while 5 lacked functional bilateral dorsiflexion with knees
Effects of Nintendo Wii Fit on Older Adults
133
TABLE 3. Dorsiflexion Passive Range of Motion Measurements in
Degrees
Subjects
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1
2
3
4
5
6
Knees Flexed R/L
Knees Flexed R/L
8/6
10/13
14/12
4/4
8/12
3/1
2/0
10/13
5/3
−4/−2
2/2
3/0
extended (Root, Orien, & Weed, 1977). These findings are displayed in Table 3.
This confirmed our hypothesis that decreased ankle range of motion and absent
ankle strategies may have inhibited participant success with the Wii games that require subtle movements more consistent with the ankle strategy.
Although this study suggests that the Wii Fit system may be effective in improving balance in older adults, findings should be interpreted within the boundaries
of its limitations. The results are limited by the small sample size, which was constrained due to the memory size of the Wii gaming system that only allows 8 participants to be saved. The number of participants was also small due to researchers’
availability, time, and space restrictions. The sample included only one male participant, which also limits the generalizability of results. The results of this study also
cannot be isolated to the Wii Fit intervention due to the absence of a control group
and the inability to control subject’s physical activity outside of the study.
Recommendations for future research include a larger, more representative sample of older adults with more stringent inclusion and exclusion criteria. It is suggested to have a BBS score of less than 48 to prevent a ceiling effect from occurring. A history of falls in the 6 months prior to study initiation may also help to
determine the Wii Fit system’s impact on fall risk. To obtain this information, a
screening exam may be a useful tool for inclusion in the study. An activity journal
is also recommended so that activity outside of the Wii Fit training sessions can
be documented. A frequency and duration of 2×/week for 6 weeks was chosen to
mimic a typical physical therapy plan of care. A frequency and duration should be
considered as this may not be sufficient to improve balance. Also, a greater consistency in games performed by participants during each session should be considered,
given that older adults may have deficits in the learning of new motor skills (Boyd
et al., 2008; Tunney et al., 2003).
CONCLUSION
The results of this study suggest that the Wii Fit may be an effective tool for physical therapists to consider when choosing interventions for older adults with balance
deficits. While further research is needed, the trends evidenced among our participants indicate that the Wii Fit is a promising, low cost alternative to expensive force
plate systems.
Declarations of interest: The authors report no declarations of interest.
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Bainbridge et al.
ACKNOWLEDGMENTS
The authors wish to acknowledge and thank the following: Lebanon Valley College
for providing equipment and space, Alicia Reese and Charissa Nordall for their
time and assistance in implementing the interventions, Carol Brashear for her assistance in recruiting and scheduling participants, and all of our participants and
their families for their time and effort.
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ABOUT THE AUTHORS
Emily Bainbridge, Sarah Bevans, and Brynne Keeley are doctoral students in the
Physical Therapy program at Lebanon Valley College, Annville, Pennsylvania,
USA (Note: this study was completed to fulfill requirements for the DPT degree at
Lebanon Valley College). Kathryn Oriel, PT, EdD, is an assistant professor in the
Department of Physical Therapy at Lebanon Valley College, Annville, Pennsylvania, USA.
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