Postural Balance Clinical Trial
Official title:
Effectiveness of a Postural Control Exercise Program on Balance and Risk of Falls in Sedentary Older Adults.
Introduction: Balance is one of the physical capacities that are altered due to the changes
produced by aging. This represents an increased risk of falls in older adults. In Spain, the
percentage of older people who fall each year is high and carries a series of important
economic and social consequences. Sedentary lifestyle complicates this process, further
increasing the risk of falls in older adults.
Objective: To design and apply a postural control exercise program to improve balance and
reduce the risk of falls in healthy sedentary older adults.
Material and methods: Longitudinal, prospective, quasi-experimental study, in which a balance
program of one weekly session for 24 weeks was developed. 112 healthy people over 60 years of
age participated and were randomly divided into three work groups: Active Intervention Group
(GIA), Sedentary Intervention Group (GIS) and Control Group (CG). His steady state and risk
of falls were analyzed with the following functional tests: Tinetti Scale, Timed Up & Go
Timed Test (TUG), One-Legged Stance Test (OLS), Fullerton Advanced Balance Scale (FAB) and 30
Second Chair Stand Test (30SCST). The GIA and GIS carried out the balance program and
received a workbook to carry out at home. The CG only performed the home exercises.
INTERVENTION PROTOCOL The target population of our study were older people belonging to one
of the older people's associations in the town of Salamanca. The program was offered in the
different associations and an inscription sheet was passed in which they had to provide
different information related to their personal situation. All the people he wanted signed
up.
Once all the participants enrolled in the program, a draw of places was done to guarantee the
randomization of the sample, assigning the participants to the intervention group or the
control group.
To ensure a sample size with a confidence level of 95% and an error rate of 10%, a larger
sample of 96 people was assumed. A total of 112 participants were included in the program.
An initial assessment was made of all program participants, regardless of the group to which
they were assigned. In this session, they were given an informed consent that they had to
sign it in order to participate in the program.
The most important data when selecting the elderly is the level of physical activity they
carry out in their day to day. In this way, the elderly were divided into two groups: a
trained group, that is, who was doing physical activity at the current time and had done it
during the previous year, regardless of the type it was, according to the criteria
established by WHO; and a sedentary group, which included those elderly who did not meet the
minimum criteria for recommended physical activity.
Initial Assessment
The initial assessment was carried out during the first week of the intervention. All the
participants did it regardless of the group to which they belonged. The following tests were
carried out to evaluate the participants:
- Anthropometric analysis (weight, height, BMI).
- Fullerton Advanced Balance Scale.
- Tinetti Scale (balance and gait).
- Timed Up & Go Test.
- One-leg Stance test.
- 30 Second Chair Stand Test.
Intervention Groups Both the intervention group made up of active people (AIG) and the group
made up of sedentary people (SIG), started the intervention after carrying out the initial
assessment. To avoid bias, the participants and the physiotherapists in charge of giving the
sessions were blinded without knowing the group to which they belonged. Only the principal
investigator responsible for conducting the initial assessment knew about the division.
Participants developed the balance program for a total of 24 weeks. The sessions were
performed once a week, lasting 55-60 minutes.
The sessions had an individual part and a group part, with a short break within them.. In
addition to the exercise protocol as such, guidelines were taught to perform the home-based
workbook in a safe and appropriate manner.
After this period, a final assessment was carried out, where all the participants were
reviewed again.
Intervention
For the design of the standard session, warm-up exercises, muscle strength, postural control
and stretching were included, in addition to dedicating time to hydration. Hydration is not
considered exercise as such, but it is considered necessary during the session, since it is
essential for older people. The plan used to design the sessions is detailed below:
1. Warm-up.
2. Muscle strength exercises.
3. Individual postural control exercises.
4. Hydration.
5. Groupal postural control exercises.
6. Stretching and ventilation exercises. It is recommended to wear comfortable and wide
clothing that allows the necessary movements to be carried out and avoids friction and
discomfort. The indicated shoes are comfortable sports shoes, avoiding high-heeled
shoes, shoes that are too tight or shoes that do not fit well and produce imbalances.
Before starting the program, the participants were informed that they should try to carry out
the exercises as correctly as possible, making an effort, but that each person should adapt
the exercise to their level, carrying out the activity safely and avoiding dangers. In
addition, the physiotherapists in charge of directing the activity, during the progression of
the sessions indicated to the participants those variations that they considered necessary
for the exercise to be safe but effective, progressing in the difficulty as the physical
condition of the participant required it.
At the beginning of the session there was a greeting and a count of the participants, to
control attendance and check the clothing of each one.
1. - Warm-up The warm-up always includes the same exercises, which allow the participants
to become familiar with them and introduce the exercises of strength and postural
control. This part of the session includes the first 10 minutes of it.
2. - Exercises of muscular strength These exercises are performed for approximately 10
minutes. The exercises are alternated throughout the sessions, in such a way that, each
week, the upper or lower body is worked more.
3. - Individual postural control exercises The duration of this part of the session is
approximately 10 minutes, alternating exercises throughout the program. During this part
of the session, the physical therapists who lead the activity pay special attention to
how the participants perform the exercises, correcting and giving the appropriate
instructions when necessary.
4. - Hydration Each session is given a break of approximately 5 minutes to hydrate. In each
session, participants are reminded to bring a bottle of water or juice to hydrate
properly. Older adults are a risk group for dehydration. This can be aggravated during
physical exercise. Therefore, it is recommended to hydrate during the sessions, to avoid
problems associated with dehydration, such as urinary infections, constipation or
hypotension.
5. - Groupal postural control exercises After hydration, the session is continued with
postural control exercises, but including group activities so that there is a more
playful part and, thus, increase the motivation of the participants.
6. - Stretching and ventilation exercises At the end of the previous activity, stretching
exercises of the different muscle groups are carried out, as well as mobility exercises
accompanied by respiratory movements to return to rest and lower heart rate. This part
of the session lasts approximately 10 minutes.
7. - Precautions and exercises to avoid Exercises that keep the head below the level of the
waist, which involve hyperflexion, hyperextension, or hyperrotation of the spine or
other joints, should be avoided.
Exercises must be done safely and comfortably. Any exercise that causes discomfort or pain on
the participants should be avoided.
All exercises must be carried out safely, if they require supports they must be stable and
physiotherapists must ensure that no participant is in danger of falling..
Control Group The target population were older people who decided to enroll in the program
voluntarily and who were sedentary, that is, who did not meet the WHO criteria of recommended
physical activity for their age group.
The objective of having this control group was to determine the effectiveness of the program
and the usefulness of having a professional who teaches and trains individuals. We wanted to
see if the program improved the physical capacity of the participants and if the presence of
a professional as well as attendance at a regular activity is beneficial and determines
greater changes in the subjects' abilities.
The control group should be composed of sedentary people, since in previous studies it was
seen that attendance at physical activity programs, such as the Geriatric Revitalization
Program (PReGe) carried out by the University of Salamanca, determined sufficient changes to
improve the balance of participants.
The group consisted of those participants who during the draw were not selected for the
intervention group. Not all of them formed the group but after the initial assessment and
determine the level of physical activity each were selected those who were sedentary, and
those who were active were excluded from the study.
During the assessment session, they were also given a notebook where some exercises to
improve balance were explained in detail and they were instructed to do them at least twice a
week.
After 24 weeks, they were asked to pass the assessment tests again and thus it was determined
whether the indication of home-base exercise had any effect on the physical abilities of the
subjects.
Final Assessment At the end of the intervention period, a final assessment was carried out by
both groups, which included the same tests as the initial assessment.
Statistical analysis of the data For the storage, treatment and statistical analysis of the
data, the statistical package IBM-SPSS-Statistics, version 23.0, for Windows was used.
The data was digitized and, afterwards, an exhaustive descriptive analysis of all the
variables was performed to detect possible errors in the collection or digitization of the
data, mainly affecting the maximum and minimum of the quantitative variables.
Once the definitive data matrix was defined, a descriptive analysis of the different
variables and data collected during the initial assessment was carried out, as well as an
analysis of data by protocol. To determine which statistic corresponds to them, firstly, a
normality test of each variable was performed with the Shapiro-Wilk Test, one of the most
powerful tests, especially with small samples, as is our case.
In the event that the variable followed a normal distribution, the mean (M) and standard
deviation (DT) were calculated. If the variable did not follow the normal distribution, the
median and interquartile range were calculated. In the case of categorical variables, the
results were expressed in percentages.
The descriptive study was carried out, segmenting the sample and dividing it by sex, age,
activity level and BMI.
In the descriptive analysis of the variables related to balance and the risk of falls, the
percentage of people who were at risk of falls was calculated for each of the variables.
For the comparative analysis between two quantitative variables, the T-Student test was used,
if the variables behaved normally, and the U-Mann-Withney test when any of the variables did
not follow a normal distribution.
In the case of categorical or qualitative variables, they used contingency tables and the
Chi-square test to analyze the results obtained.
For the inferential analysis of the data, whenever there were more than two variables for the
analysis, the F-Snedecor test (ANOVA) was performed if the variables were normal, or the
H-Kruskal-Wallis test, when any of the variables were not maintained a normal distribution.
Contrast tests were performed, in the event that there were significant differences in the
tests of multiple variables. To determine between which groups there were differences, t
tests were used to determine the contrast.
The calculation of correlations was also performed, using the Pearson's correlation
coefficient, for quantitative variables, or the Spearman correlation coefficient, in the
event that any of the variables was categorical.
In all analyzes, a 95% confidence interval was established with significance indices of p
<0.05. The results obtained have been expressed with the value of the statistician, as well
as the p-values and those data that are most interesting for the interpretation of the
results.
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