Rev Bras Fisiol Exerc 2020;19(5):409-420
doi: 10.33233/rbfex.v19i5.4239
ORIGINAL
ARTICLE
Acute
effects of Mat Pilates on ambulatory blood pressure variability in post
menopause women
Efeito agudo do Mat Pilates sobre a variabilidade da pressão arterial ambulatorial
em mulheres após a menopausa
Jaqueline Pontes
Batista¹, Igor Moraes Mariano¹, Ana Luiza Amaral¹, Larissa Aparecida Santos
Matias¹, Tállita Cristina Ferreira De Souza¹, Ana
Paula Magalhães Resende¹, Guilherme Morais Puga¹
1Physical Education and
Physical Therapy Department, Federal University of Uberlandia, Uberlândia/MG, Brazil
Received
on: June 29; 2020; Accepted on: September 10, 2020.
Corresponding author: Prof. Guilherme
Morais Puga, Faculdade de Educação Física e
Fisioterapia, Universidade Federal de Uberlândia, Rua Benjamin Constant, 1286
Aparecida 38400-678 Uberlândia MG, Brazil
Jaqueline Pontes
Batista: jaquebpontes@gmail.com
Igor Moraes Mariano:
igormmariano@gmail.com
Ana Luiza Amaral:
anaribeiro.am@gmail.com
Larissa Aparecida Santos
Matias: larissa_matias02@hotmail.com
Tállita Cristina Ferreira de
Souza: tallita_crystina@hotmail.com
Ana Paula Magalhães
Resende: anapaulamrb@gmail.com
Guilherme Morais Puga: gmpuga@gmail.com
Abstract
Background: After menopause, women increase the risk of developing cardiovascular
disease. Physical exercise is one of the treatments for reducing the incidence
of these diseases, and the Pilates method consists of a complete conditioning
program. Aims: To verify the responses of Ambulatory Blood Pressure
Monitoring (ABPM) and Blood Pressure Variability after a single session of Mat
Pilates in non-obese post menopause women. Methods: This is a randomized
crossover study with 15 normotensive postmenopausal women, who participated in
a single Mat Pilates session and a control session. The Mat Pilates session
lasted 50 minutes, with 5 minutes of warm-up. In each exercise, there was 1 set
of 10 repetitions with 45 seconds of rest between sets. The control session
should have the same duration, but the volunteers remained seated. ABPM was
assessed for 24 hours after the intervention. Statistical analysis: Two-way
ANOVA with Newman-Keuls post hoc was used to analyze
ABPM variables and Student's t test for analysis of blood pressure variability.
Results: There was no significant difference (p < 0.05) in systolic
blood pressure nor diastolic blood pressure responses during 24h, awake and
sleep phases and in its variability between Pilates and Control sessions. Conclusion:
Acute Mat Pilates did not reduce ABPM or its variability in non-obese
postmenopausal women.
Keywords: menopause, arterial pressure, exercise therapy.
Resumo
Introdução: Após a menopausa
mulheres tem maior risco de desenvolver doenças cardiovasculares. A prática de
exercício físico é um dos tratamentos para e redução da incidência dessas
doenças, e o método Pilates consiste em um programa completo de condicionamento
físico. Objetivos: Verificar as respostas da Monitorização Ambulatorial
da Pressão Arterial (MAPA) e da Variabilidade da Pressão Arterial após uma
única sessão de Mat Pilates em mulheres após a
menopausa não obesas. Métodos: Este é um estudo cruzado randomizado com
15 mulheres pós-menopáusicas normotensas, que participaram de uma única sessão
de Mat Pilates e de uma sessão de controle. A sessão
de Pilates durou 50 minutos, com 5 minutos de aquecimento. Em cada exercício,
houve 1 série de 10 repetições com 45 segundos de descanso entre as séries. A
sessão controle teve a mesma duração, mas as voluntárias permaneciam sentadas.
A MAPA foi avaliada durante 24 horas após a intervenção. Estatística:
Utilizou-se ANOVA de dois fatores com post hoc de Newman-Keuls
para análise das variáveis da MAPA e teste t de Student
para análise da variabilidade de pressão arterial. Resultados: Não houve
diferença significativa (p < 0,05) nas respostas da pressão arterial
sistólica e diastólica durante 24h, vigília e sono ou em sua variabilidade
entre as sessões de Pilates e Controle. Conclusão: O Mat
Pilates não reduziu os valores pressóricos da MAPA ou sua variabilidade em
mulheres após a menopausa não obesas.
Palavras-chave: menopausa, pressão
arterial, terapia por exercício.
Aging is one of the risk factors for cardiovascular diseases
development, especially hypertension (HT) [1]. When comparing HT prevalence
between sexes, it is observed that men have greater presence of HT, but after
menopause, this prevalence becomes higher in women [2]. The lack of estrogen
production, changes in the lipid profile and social factors, which make women
become more sedentary [3], generate physiological dysregulations after
menopause and therefore may explain this inversion of prevalence.
Among the strategies for treatment and prevention of cardiovascular
diseases, the practice of physical exercise is noteworthy. These are
responsible for several hemodynamic responses, including reducing blood
pressure (BP) after a single session of different exercises (i.e. post exercise
hypotension; PEH), both in normotensive and hypertensive individuals [4]. Among
the resistance exercises, the Pilates method stands out for the great
adherence, especially of middle age women [5].
Pilates method is a complete conditioning program, which aims to work
out strength, flexibility and balance [6]. Thus, this method has six essential
principles: concentration, control, precision, movement fluidity, breathing
control and use of the strength core [7]. Although Joseph Pilates (the creator
of the method) and Miller affirm that this method is capable to improve the
cardiovascular system [6], few are the studies that demonstrate this [8,9].
In this sense, one of the methods used to evaluate cardiovascular
responses to exercise is ambulatory blood pressure monitoring (ABPM). Through
this evaluation it is possible to check BP for 24 hours after a physical
exercise session [10], making it possible to analyze how these values vary
(i.e. blood pressure variability; BPV) [11]. Thus, we have as primary objective
to test the hypothesis that a session of Mat Pilates can alter the pressure
values of ABPM and secondary, to test the BPV in normotensive post menopause
women.
Study
design
This is a randomized cross-over study with normotensive postmenopausal
women. As inclusion criteria, participants were required to be: in post
menopause (amenorrhea for at least 12 months and [FSH] > 40 mUI/mL); aged between 50 and 70 years for being the age
group in which menopause occurs, and able to perform exercises, since our study
evaluates variables after a successful exercise protocol. The study did not
include women under hormonal therapy, since the use of these drugs generates
physiological variables that we will not analyze; that have history of stroke
or acute myocardial infarction, or have diagnosis of diabetes mellitus, and
smokers as a way of standardizing the sample. All participants went through a
medical evaluation before the intervention, obtaining a certificate to attest
individual suitability for exercise practice. Exclusion criteria was applied to
volunteers who failed to perform the protocol test and volunteers in which the
ABPM presented more than 25% of error. Table I presents the general
characteristics of the sample.
Table
I - General characteristics (n = 15)
SBP
= Systolic blood pressure; DBP = Diastolic blood pressure; HR = Heart Rate
Before the body composition measurement, all participants were instructed
not to perform vigorous physical exercise 24h before the test and to avoid
alcohol and caffeine consumption 72h before the test. Regarding the order of
execution of the experiment, a simple randomization was performed using a
program on the web (https://www.random.org/lists/). The volunteers were
randomly selected to know the order of execution, being an acute Mat Pilates
session and a control session. The evaluations were carried out in the morning,
respecting less than 48 hours between them.
The study was conducted between January and June of 2016, at the
Laboratory of Cardiorespiratory and Metabolic Physiology of the Federal
University of Uberlândia, Uberlândia/MG,
Brazil. It was approved by the local Ethics Committee (002095/2015) and all
volunteers assign a consent term.
At the first visit, an anamnesis was performed followed by
anthropometric assessments. On the second visit the familiarization with the
method was carried out, followed by an explanatory lecture about the six
principles of Pilates. On Pilates session, volunteers arrived at the site at
07:00 am and remained in seated position for 20 minutes to assess BP at rest.
The exercise protocol was then performed for 50 minutes and soon after the ABPM
device was placed on the volunteer's non-dominant arm, being withdrawn 24 hours
later. On control session, the same process was performed, but without the
exercise protocol, being that the volunteers performed the same exams, however,
they sat at rest for 50 minutes, not performing any type of exercise. All
participants were instructed to maintain their living habits, including
feeding, and not to perform vigorous activities within 48 hours prior to the
sessions.
Experimental
sessions
The control session lasted 50 minutes. The volunteers were seated, being
able to perform some quiet activity, such as conversations, reading books or
magazines and even using their cell phones.
The Mat Pilates session lasted 50 minutes, with 5 minutes of warm-up. In
each exercise there was 1 set of 10 repetitions with 45 seconds of rest between
then. Was used only body weight and auxiliary materials, such as mats, swiss
ball and flexible ring, in addition we use the rate of perceived exertion scale
(RPE) for intensity control, the session was performed in RPE between 11-14,
regarding moderate exercise intensity [12]. Twenty exercises were chosen from
the classics, classified as such by the method creator [6], and are described
in detail in the supplementary table. During the sessions, the volunteers were
instructed not to perform the Valsalva maneuver.
Baseline
characteristics
Baseline BP and heart rate (HR) were monitored through calibrated and
validated automatic oscillometric monitors (Omron
HEM-7113, Shimogyo-ku, Kyoto, Japan) in 3
non-consecutive days. At each time frame, 3 measurements of systolic BP (SBP),
diastolic BP (DBP), mean BP (MBP) and HR were performed and considered the mean
for analysis. The anthropometric evaluations were performed in an isolated
environment during the morning. The following variables were evaluated: body
mass, through an electronic scale (Filizola, São
Paulo, SP, Brazil); height, measured with a fixed stadiometer (Sanny, São Bernardo do Campo, SP, Brazil) and waist and hip
circumferences, through an inelastic tape 0.5 cm wide (Filizola,
São Paulo, SP, Brazil).
Ambulatorial
Blood Pressure Monitoring
To evaluated SBP, DBP and HR in 24-hour, wake and sleep phases, the
Dyna-MAPA+ device (Cardios, São Paulo/SP, Brazil) was
used. This device took measurements every 15 minutes from 07:00am to 11:00pm
and every 30 minutes from 11:00pm to 07:00am. The device was placed shortly
after the end of the experimental sessions. Through 24 hours recording, the
mean BP values were calculated every two hours for point-to-point analysis.
From the information reported in an events diary in which volunteers indicated
the moment they slept and woke up during the use of the device, the values of
the 24h, wake and sleep phases were performed. Through ABPM records, BPV was
evaluated through the indices: SD24 (mean of 24-hour standard
deviations), SDdn (mean values of diurnal
and nocturnal standard deviations corrected for the number of hours included in
each phase) and ARV (mean differences weighted by the time interval between
consecutive readings).
Statistical
analysis
The sample size (n = 15) was calculated using G*Power 3.1 (α =
0.05; power = 0.80; effect size = 0.7). This effect size was calculated from
the average difference in systolic hypotension between the Pilates and control
sessions, considered as 3.3±3.6 mmHg [13]. Since we did not find studies with
Pilates and 24-hour measurements, the effect size found (ES = 0.91) was reduced
to 0.7 to suit a more pessimistic situation with 24-hour measurements. The
descriptive results are presented in mean ± standard deviation. The
Shapiro-Wilk test was applied to verify data normality. The two-way ANOVA for
repeated measurements was used to compare the sessions in 24-hour, sleep and
wake phases, as well as every two hours in ABPM. The Newman-Keuls
post hoc was applied when necessary. For BPV analysis, the Student t-test was
applied. All analyzes were performed using the software Statistica
10.0 (TIBCO Software Inc., Palo Alto, CA, USA), adopting a level of
significance of p < 0.05.
After we recruited twenty women that fit in the inclusion criteria, five
volunteers did not agree to participate, and fifteen non-obese postmenopausal
women finished all the sessions. Figure 1 shows the results of ABPM from all
women. There were no differences in SBP, DBP and MBP responses during total 24
hours, awake and sleep phases between sessions. Figure 2 shows SBP, DBP and MBP
responses over time (every 2 hours). Statistical analysis showed no significant
difference between the Mat Pilates and control sessions. Additionally, table II
shows BPV variables (SD24, SDdn
and ARV) from SBP, DBP and MBP, and t student test did not show significant
differences between sessions.
SBP
= Systolic blood pressure; DBP = Diastolic blood pressure; MBP = Mean blood
pressure. Statistical difference by two-way ANOVA
Figure
1 - Systolic, diastolic and mean blood pressure
during the 24 hours, sleep and wake phases
SBP
= Systolic blood pressure; DBP = Diastolic blood pressure; MBP = Mean blood
pressure. Statistical difference by two-way ANOVA
Figure
2 - Systolic, diastolic and mean blood pressure
every two hours, for 24 hours
Table
II - Blood pressure variability
SD
= Standard deviation; CI = Confidence interval; SBP = Systolic blood pressure;
DBP = Diastolic blood pressure; MBP = Mean blood pressure; SD24 =
mean of 24 hours standard deviations; SDdn
= mean of day and night standard deviation corrected for the number of hours
included in each phase; ARV = mean differences weighted by the tine interval
between consecutive readings. Statistical difference by Student t-test
The current study indicated that a single session of Mat Pilates did not
change ambulatory BP responses during 24 hours after its performance in
non-obese postmenopausal women. Moreover, this exercise did not change BPV
during this period in these population.
Blood pressure analyzes after physical exercise have been studied in the
last decades, and BP reductions after a single exercise session were observed
in both high cardiometabolic risk [14] and healthy populations [4,15]. When
comparing BP responses between different types of exercise, aerobic exercise
seems to be more effective in promoting BP reductions, either in 24-hour, awake
or sleep phases [10], but that are still little explored after Pilates
performance. Thus, to our knowledge, the present study was the first to
investigate BP responses through ABPM in postmenopausal women after a Mat
Pilates session. Therefore, despite having a relatively small sample size, but
which is in accordance with the sample calculation and similar studies, it has
clinical relevance, since this is a population predisposed to develop
cardiovascular diseases [1], and who is also the one who most seeks the
practice of the Pilates for treatment or prevention of various diseases [5].
In this sense, a review [16] about Pilates in hypertensive patients
suggested that the benefits of this method are like traditional isometric
exercises in BP reduction, since they are widely used in Pilates. They also
suggest that this type of resistance training is more attractive to
practitioners than usual weightlifting training, thus increasing adherence to
physical exercise. This characteristic gains great importance in hypertensive
patients due to the low adherence to the drug treatment [17], being that the
use of non-pharmacological strategies as a form of antihypertensive treatment
has become one of the main demands of patients, caregivers and health
professionals [18].
However, when analyzing a single session of Pilates, hypotensive
responses do not look promising in healthy populations. In studies similar to
the present study, with normotensive women after menopause [19], young men [13]
or women already trained in the modality, mostly normotensive [20],
demonstrated that there was no hypotensive effect of a single Pilates session
when comparing to the control in the first 60 minutes post exercise. This
result is maintained even though it has increased the bioavailability of
salivary nitrite (nitric oxide precursor, a potent vasodilator) [19]. On the
other hand, a study with hypertensive patients [21] demonstrated SBP and MBP
falls between 5 and 8 mmHg, 60 minutes after the Pilates session compared to
the control. Is important to note that these studies, monitored the BP
responses for a short period of time (around 60 minutes) and not during 24h as
our study.
Although in normotensive patients Pilates does not appear to be
effective in promoting BP responses acutely, studies with chronic interventions
[8,9] have also been investigating this phenomenon and found promising
cardiovascular outcomes, mainly fall in resting SBP [8]. However, clinical
trials are still quite conflicting. For example, SBP falls were found after Mat
Pilates training phase in young women [7] and in elderly women [8]. On the
other hand, in another study [22], it was found that 20 sessions of Pilates are
not able to decrease BP in sedentary young women.
Besides the direct benefits in BP, there is evidence that the practice
of Pilates can bring benefits to body composition [23], lipids profile [24],
fasting glucose [25], bioavailability of salivary nitrite [19] and symptoms of
anxiety and depression [26]. These data may suggest indirect control of BP in
long term, by reduction of associated factors.
In addition to BP values being important predictors of cardiovascular
risk, the way these values fluctuate during the day (i.e. BPV) are also
important to identify low risks of cardiovascular diseases [27]. Although the
practice of regular exercise has an apparent correlation with lower values of
BPV [28], in the present study we did not find differences in any BPV index
after Mat Pilates performance. These results corroborate with several exercise
studies with healthy men and women with same age [29-31]. However, it is worth
mentioning that these studies analyzed chronic effects of exercise and most of
them intervened with aerobic exercises [29-31], some with dynamic resistance
[32] or isometric [33], but we do not know about these variables after Pilates
training.
It is also worth mentioning that the characteristics of exercise can
influence these responses. In the present study, the intensity of exercise was
moderate (RPE between 11 and 14) and duration of 50 minutes, and no BP
reduction after the exercise performance was evidenced. In this sense, although
some studies show that exercise intensity does not influence the hypotensive
response of exercise [34], others demonstrate that exercise intensity may
influence the duration of such response [35,36], just as the magnitude may be
dependent on the duration of the exercise [37]. In addition, this relationship
with intensity and duration of training also seems to influence the responses
of BPV [38]. It is important to note that it is not easy to control the
exercise intensity during Mat Pilates performance due the characteristics of
the mixed movements (aerobic, resistance and isometric) when compare with the
performance of only aerobic (running, jogging or walking) or resistance
exercise for example.
Another interesting point is that, in general, Pilates proves to be
quite safe for practice, since it causes minor changes in HR, SBP and Double
product during exercise [13,39]. In addition, the parasympathetic parameters of
heart rate variability do not change after a Pilates session in a normotensive
population [19]. These results may suggest a low degree of autonomic stress
post Pilates session in this population, whereas traditional resistance
exercise seems to generate the highest post-exercise autonomic stress [15,19].
However, in hypertensive patients these values were altered [21].
Finally, an important characteristic of this population that might have
limited the occurrence of PEH is the resting BP value, since baseline BP was
normal, which prevents a large magnitude of BP falls, but which may be
different in hypertensive patients [40]. In this sense, in populations with
cardiometabolic dysfunctions the results in BPV after exercise also seem to be
promising [41], which may suggest a more interesting regulatory effect in this
type of population, but which are still little studied after Pilates training.
These differences may occur due to compensatory mechanisms, such as the
baroreflex, which prevent large magnitude in hypotension in normotensive
individuals [40]. It is worth mentioning that the present study did not
evaluate those mechanisms associated with variations in BP or BPV, as it was
not proposed for this analysis.
Considering the above mentioned, this study has clinical relevance since
it provides an alternative to traditional exercises when trying to understand
the responses in women's BP after menopause to the Pilates method. In addition,
this study will be the basis for possible future studies with hypertensive
women, since we verified the safety of the method session in the cardiovascular
system in women without the disease. Thus, more studies are needed to
investigate the physiological mechanisms using different devices of Pilates
Methods. In addition, for the best application in clinical practice, it is
necessary to conduct investigations on chronic responses to Pilates training
and in hypertensive individuals.
Based on our results we conclude that a single session of Mat Pilates
does not change post-exercise ambulatory blood pressure responses nor blood
pressure variability during 24 hours in non-obese post-menopausal women.
Disclosure
of potential conflicts of interest
All authors declare no conflicts of interest.
Funding
This study was funded by the Minas Gerais State Research Foundation
(FAPEMIG) (APQ-00750-14) and the National Council for Scientific and
Technological Development – CNPq (456443/2014-2) e CNPq (794078/2013).
Authors
contribution
Conception and design of the research: JP Batista, LAS Matias, TCF de
Souza, APM Resende and GM Puga;
Obtaining data: JP Batista, IM Mariano, AL Amaral, LAS Matias, TCF de Souza,
APM Resende and GM Puga;
Analysis and interpretation of data: JP Batista, IM Mariano, AL Amaral, LAS
Matias, TCF de Souza, APM Resende and GM Puga; Statistical analysis: JP Batista and IM Mariano;
Obtaining financing: JP Batista, GM Puga; Writing of
the manuscript: JP Batista, IM Mariano, AL Amaral, LAS Matias, TCF de Souza;
Critical review of the manuscript for important intellectual content: APM Resende, GM Puga.
Academic
linkage
This article represents part of the master's dissertation of Jaqueline
Pontes Batista, supervised by Professor Guilherme Morais
Puga at the Federal University of Uberlândia,
Postgraduate Program in Health Sciences - FAMED-UFU, Uberlândia,
MG.
MacDonald J, MacDougall J, Hogben C. The effects of
exercise intensity on post exercise hypotension. J Hum Hypertens 1999;13:527-31.
https://doi.org/10.1038/sj.jhh.1000866
Supplementary table
I - Pilates exercise program.