Effects of Incentive Spirometry Breathing Exercise on Lung
Function, C-Reactive Protein Level and Lipid Ratio in Individuals
with Chronic Spinal Cord Injury
Meinar Ferryani
1
, Nita Theresia Reyne S
1
, Vitriana Biben
1
, Farida Arisanti
1
, Indriati M.S Tobing
2
,
Rosiana Pradanasari
2
1
Departement of Physical Medicine and Rehabilitation, Dr. Hasan Sadikin General Hospital, Faculty of Medicine,
University of Padjadjaran, Bandung, Indonesia
2
Departement of Physical Medicine and Rehabilitation, Fatmawati General Hospital, Faculty of Medicine,
University of Indonesia, Jakarta, Indonesia.
Keywords: Chronic Spinal Cord Injury, Inflammation, Incentive Spirometry, Lung Function, Lipid Ratio, C-reactive
Protein
Abstract: Spinal cord injury (SCI) is an inflammatory process caused by axon and cell membrane damages, cell
death, leukocyte migration and degradation of the myelin layer. Inflammatory diseases are particularly
associated with cardiovascular disease. The SCI patients can experience decreased sympathetic activity
which influences carbohydrate and fat metabolisms. Decreased catecholamine release which plays a
role in the process of lipolysis and glycogenolysis can increase levels of low-density lipoprotein (LDL)
cholesterol, decreased high-density lipoprotein (HDL) cholesterol. Since the SCI often causes
respiratory problems due to reduced respiratory muscle conservation, the study was conducted to find
out the impact of sustained maximum inspiration with Incentive Spirometer (IS) to CRP level and lipid
ratio in chronic SCI patient. Methods: A quasi interventional design with a pre- and post-test approach
was done to eleven patients with chronic phase of SCI. Conclusion: These findings show although
incentive spirometry breathing exercise after 4 weeks can improve lung function and lipid ratio, it has
not decreased the systemic inflammatory levels in individuals with chronic SCI. Improvement in lung
function has not influenced the systemic inflammatory level (CRP), although a beneficial influence on
LDL/HDL ratio was recorded.
1 INTRODUCTION
Spinal cord injury (SCI) referred to spinal cord
damage due to trauma or particular diseases such as
infections, neoplasms and degenerative processes.
The Global prevalence of SCI demonstrated that 40
to 80 new cases had been discovered per one million
populations every year (WHO, 2013). In worldwide,
SCI patients had been reportedly increasing recently.
Based on the data released by World Health
Organization (WHO) 250,000 to 500,000 SCI
patients were reported per year (WHO, 2013). Data
published by the Fatmawati General Hospital in
2014 presented that there were 104 cases of new SCI
(37 traumatic cases and 67 non-traumatic cases)
(Tulaar, 2017).
The SCI has caused axon and cell membranes
damages, cell deaths, leukocyte migration, and
myelin deterioration. Damages in nerve cells can
activate the immune system response and
inflammation process (Alves, 2013). The continuous
occurrence of inflammation process in SCI leads to
chronic tissue damage. (Alves, 2013).
The inflammation process can be detected by
increasing C-reactive protein (CRP) which is one of
the cytokines that play roles in several inflammatory
responses. The production of CRP from the liver is
controlled by interleukin-6 (IL-6) (Pederson, 2006).
Chronic SCI is commonly associated with increased
CRP serum concentrations defining as an
inflammatory marker of several phases such as
220
Ferryani, M., S, N., Biben, V., Arisanti, F., Tobing, I. and Pradanasari, R.
Effects of Incentive Spirometry Breathing Exercise on Lung Function, C-Reactive Protein Level and Lipid Ratio in Individuals with Chronic Spinal Cord Injury.
DOI: 10.5220/0009088402200226
In Proceedings of the 11th National Congress and the 18th Annual Scientific Meeting of Indonesian Physical Medicine and Rehabilitation Association (KONAS XI and PIT XVIII PERDOSRI
2019), pages 220-226
ISBN: 978-989-758-409-1
Copyright
c
2020 by SCITEPRESS Science and Technology Publications, Lda. All rights reserved
acute and chronic inflammatory, and endothelial
activation (Wang, 2007).
Inflammatory diseases are distinctively
associated with cardiovascular diseases. An
epidemiological study in normal population stated
that high levels of CRP become a predictor of
cardiovascular diseases. The
CRP values in adults’
chronic SCI were consistent with the AHA
classification of high CVD risk, especially those of
persons with tetraplegia (Gibson, 2008). Therefore
cardiovascular disease has become one of many
causes of deaths besides respiratory system disorders
(Zonneveld, 2014).
The SCI patients can experience decreased
sympathetic activity which influences carbohydrate
and fat metabolisms. Decreased catecholamine
release plays a role in the process of lipolysis and
glycogenolysis that can increase levels of low-
density lipoprotein (LDL) cholesterol, decreased
high-density lipoprotein (HDL) cholesterol, and 8–
18% fat mass which is higher than healthy people
(Gibson, 2008). Dyslipidemia is observed in a large
number of individuals with chronic SCI. The risk of
dyslipidemia was seen to have increased in motor
complete SCI patients and patients who could not be
community ambulated (Koyunchu, 2017). The high
percentage of dyslipidemia found in chronic SCI
supports the increased risk of coronary heart disease
(Vichiansiri, 2012). The LDL/HDL ratio is an
indicator of sudden death risk due to cardiac
abnormality (sudden cardiac death/SCD). A high
LDL/HDL ratio (> 4,22) in blood is in accordance
with an increased risk of SCD (Kunutsor, 2017).
Exercise is an important rehabilitation therapy
for SCI patients because it can improve sympathetic
response by increasing catecholamines, inducing the
process of lipolysis and activation of immune cells
in the blood (Alves, 2013). This condition leads to
decreased body fat, especially visceral fat, and
decreased inflammatory cytokines in the blood so
that it will reduce the chronic inflammatory response
in SCI patients (Alves, 2013).
Systemic inflammation has been associated with
decreased lung function in individuals with or
without chronic medical conditions. Individuals with
chronic SCI have clinical characteristics that can
cause systemic inflammation and decreased lung
function. Plasma CRP and IL-6 in individuals with
chronic SCI are inversely related to forced
expiratory volume in one second (FEV1) and forced
vital capacity (FVC) (Hart, 2017). Systemic
inflammation associated with chronic SCI can
contribute to decreased lung function (Hart, 2017).
In patients with spinal cord injury (SCI), the
respiratory function may be affected due to complete
or partial paralysis of the respiratory muscles and
abdominal muscles leading to a reduction in the
ability to breathe (Kim, 2017). Improved inspiratory
muscle strength and endurance could potentially
improve cough and maximal exercise ventilation in
addition to decreasing dyspnea (Sheel, 2007).
The advantages of using an incentive spirometer
are: 1) it is easy to learn how to use the instrument;
2) it is economical, and 3) patients can be motivated
to use it, as it produces a visible improvement. Its
visual feedback helps to train patients to use the
instrument independently and freely and it
maximizes their respiratory motivation (Kim, 2017).
Incentive spirometer can be used to maintain
maximum inspiration by providing predetermined
volume feedback (Restrepo, 2011). The IS enables
the mobilization of large lung volumes and the
increased intra-alveolar pressure at the end of
inspiration. This condition improves breathing
capacity, and challenges the patient with the visual
stimulus generated by the device (Paiva, 2015).
The intervention of inspiratory muscle training
(IMT) in chronic heart failure (CHF) patients have
shown to reduce CRP levels (Adamopoulos, 2014).
Giving IS exercise to patients with chronic
obstructive lung disease (COPD) for 4 weeks also
can reduce inflammatory cytokines of IL-6 and
TNF-α. (Leelarungrayub, 2018).
The effect of IMT on CRP levels and lipid ratio in
chronic SCI patients has not been clearly studied.
Therefore, this study aimed to determine the effect
of inspiratory muscle training with IS on CRP levels
and lipid ratio in chronic SCI.
2 METHODS
This study used a quasi-interventional research
design with a pre- and post-test approach. The
population in the study was all chronic phase of SCI
patients who occupied in the Social Care Center of
Bina Daksa Pondok Bambu, West Jakarta,
Indonesia.
The samples were recruited based on the
inclusion criteria, that were chronic SCI, aged 18
59 years old, paraplegic, no acute infection, stable
spinal structure, able to perform breathing muscle
training inspiration procedure for 30 minutes,
Hamilton Depression Score (HDS) less than 20,
Mini Mental State Examination (MMSE) score
between 22–30. Exclusion criteria unable to take a
deep breath due to pain, taking analgesic opiates and
patients with vital capacity <10 mL/kg. The subjects
Effects of Incentive Spirometry Breathing Exercise on Lung Function, C-Reactive Protein Level and Lipid Ratio in Individuals with Chronic
Spinal Cord Injury
221
signed an informed consent to be included in the
study. After each set, a one-minute rest was allowed.
The IS training program was conducted after the
subjects were given explanations of the exercise
device, watched a video about the use of the exercise
and familiarizing the device for 2 consecutive days.
The subjects maintained a maximal inspiration for 3
to 5 seconds, and then performed maximal
expiration. This exercise was performed for a total
of five sets, with 10 repetitions making up one set.
After each set, a one-minute rest was allowed (Kim,
2017).
The CRP levels and LDL/HDL ratio were
examined 24 hours before the IS training begin and
after the study ended. The study measured CRP
levels by using hs-CRP which has sensitivity range
0.01 to 10 mg/L so that levels of lower systemic
inflammations were able to be measured even in the
absence of clear systemic inflammatory or
immunological disorders (Kamath, 2015).

Lung function was measured with a
computerized spirometer during maximal voluntary
ventilation maneuvers. As the maneuvers were being
measured, the subjects were asked to sit upright and
make sure nothing was restricting chest movement
or airflow. The subjects started the test by breathing
normally through the mouthpiece, followed by
breathing as deeply and rapidly possible for 20
seconds. At the end of the measurement interval, the
subjects were asked to resume normal breathing and
the mouthpiece was removed. Three trials of the
maneuvers were performed, separated by a five-
minute rest, and the average of the results was taken.
The measured values included forced vital capacity
(FVC) and forced expiratory volume in 1 second
(FEV1), and the lung function indices were
calculated automatically by the computer (Kim,
2017).
Continous data including age were presented with
mean values and standard deviations (SD),
maximum and minimum values. The subjects’
characteristic data were presented in frequency
distribution. Categorical variables were presented in
percentage (%). Statistical analysis was carried out
by performing a normality test to determine that the
data were normally distributed or not normally
distributed.
Data distribution was discovered using the
Shapiro Wilks test since the samples were less than
50. Paired t test was used to compare numerical
variables between before and after the intervention if
the data were normally distributed and the Wilcoxon
test if the data were not distributed normally.
The
study was conducted to find out the impact of
sustained maximum inspiration with Incentive
Spirometer (IS) in improving lung function and
decreasing CRP level and lipid ratio in chronic SCI
patients. Significance of the statistical test results
was determined based on p-value (<0.05). All
procedures were performed using the SPSS for
Windows version 24.0.
The study was approved by the Ethics Committee
of Padjadjaran University, Bandung, Indonesia with
ethical numbers of 0318050786. All subjects signed
an informed consent form. The subjects could leave
the study at any time without giving any reason. All
data and information of the subjects will be kept
confidentially.
3 RESULTS
The study enrolled 11 chronic phase of SCI patients.
The mean age of the subjects was 44 years old. The
number of male subjects (90.9 %) was higher than
female subjects. The subjects had SCI
approximately 260 months (mean) due to trauma
(90. 9%) (Table 1). Most of the subjects had
complete SCI (81.8 %) with the body mass index
(BMI), the subjects were mostly underweight, below
18,5, (63.6 %) without any other complications of
chronic SCI. Occupation of the subjects was mostly
as a craftsman. None of the subjects had smoking
history. Also, the subjects did not consume
medicines that could influence CRP levels such as
statins, SSRI (selective serotonin uptake inhibitors),
and aspirin.
The differences between pre- and post-test values
for FVC (2.32 ±0.557 and 2.59 ±0.625) and FEV1
(2.16 ±0.596 and 2.40 ±0.654) was statistically
significant increased (p=0.005 and p=0.007).
However, there are no significant mean differences
between CRP level (p=0.229), before and after
practicing IS exercise (Table 2). The study also
showed that there was a significant mean difference
in LDL/HDL ratio (p=0.007) before and after IS
exercise(Table2)
KONAS XI and PIT XVIII PERDOSRI 2019 - The 11th National Congress and The 18th Annual Scientific Meeting of Indonesian Physical
Medicine and Rehabilitation Association
222
Table 1: Subject’s Characteristics
Variables Total (n=11) Mean (SD) Median
Age (Years old) 44.27±7.695 44
Sex
Male 10 (90.9%)
Female 1 (9.1%)
Body mass index category
Underweight (< 18,5) 7 (63.6%)
Normal 3 (27.3%)
Overweight ( 25) 1 (9.1%)
Occupation
Craftsman 10 (90.9%)
Mechanic 1 (9.1%)
Period of injury (months)
*
259.63±104.375 228
Etiology
Trauma 10 (90.9%)
Spondylitis TB
(inactive)
1 (9.1%)
Pressure sores
(+) 0 (0.0%)
(-) 11 (100.0%)
Medication
Mecobalamin, yes
1 (9.1%)
(-) 10 (90.9%)
Smoking history
Yes 9 (81.8%)
Normal 2(18.2%)
AIS classification
Complete 10 (90.9%)
Incomplete 1 (9.1%)
MMSE Category
Able (score 22-30) 11 (100.0%)
Unable 0 (0.0%)
HAMILTON Depression
Rating Scale Category
Yes 0 (0.0%)
No
11(100.0%)
Effects of Incentive Spirometry Breathing Exercise on Lung Function, C-Reactive Protein Level and Lipid Ratio in Individuals with Chronic
Spinal Cord Injury
223
Table 2 : C-reactive Protein (CRP), LDL/HDL Ratio, Total Leucocyte Comparison, FVC and FEV1 Before and After
Variables
Groups
p Value
Before After
n=11 n=11
CRP (mg/dL) 0.229
Mean+SD 0.44±0.750 0.61±1.073
Median 0.23 0.19
LDL/HDL ratio 0.007**
Mean+SD 3.36 ±0.429 3.04 ±0.603
Median 3.30 3.00
Total leukocytes (/µL) 0.629
Mean+SD 7250.90±1716.347 7022.72±1645.849
Median 6770.00 7360.00
FVC 0.005**
Mean+SD 2.32 ±0.557 2.59 ±0.625
Median 2.24 2.70
FEV1 0.007**
Mean+SD 2.16 ±0.596 2.40 ±0.654
Median 2.20 2.76
the value presented is the mean value + SD. Numerical data the p value is tested by paired T test if the data is normally
distributed with the alternative Wilcoxon test if the data is not normally distributed. Significance value based on the value
of p <0.05. Sign * indicates the value of p <0.05 means significant or statistically significant.
4 DISCUSSIONS
The subjects of the study were mostly men (90,9%).
Although women could have higher CRP levels than
men due to hormonal factors (O’Connor, 2009),
this condition may not significantly influence the
CRP results.
CRP levels did not change significantly due to
several factors, one of them is the high CRP level
since the beginning, although there was no sign of
infection during the study since the leucocyte count
did not increase. The CRP level could be influenced
by BMI, the level and severity of the lesion and
smoking habits. Most of the subjects in this study
were included in the underweight category with an
average BMI was 18.72 ± 2.173 kg/m2. The BMI
values are related to body fat composition. Low BMI
could be caused by decreased fat-free muscle mass
due to reduction in physical activity and atrophy
caused by paralysis. Greater adipose tissue
composition due to impaired fat and carbohydrate
metabolisms can lead to increased CRP levels
(Wang, 2007).
Lesion levels and severity of SCI itself can
influence the CRP levels. The higher lesion levels
and severe SCI indicate higher CRP levels. Those
with tetraplegia have a greater risk of CVD
compared to those with paraplegia in chronic SCI
Gibson, 2008). SCI lesions of the subjects in this
study were as high as the thoracic cord. Since most
of the subjects had complete SCI, high CRP levels
of the subjects were discovered since the beginning.
The smoking habits were not limited during the
study, these may cause a high of CRP level.
Smoking can increase the release of
proinflammatory cytokines in the blood and lung
circulation. It also can cause oxidative stress and
vascular inflammation occurs marked by increased
IL-6 and CRP levels. A previous study presented
that higher CRP levels were mostly found in the
subjects who smoked (O’Connor, 2009).
Unfortunately, this study did not have any data to
analyaze the correlation between the number of
cigarettes (packs per year) and nicotine levels with
distinctive measurements in each subject.
Exercise can decrease inflammatory cytokines in
the blood (Alves, 2013). Muscle contractions can
stimulate the release of IL-6 from muscle cells,
namely muscle derived IL-6.
IL-6 has important
anti-inflammatory effects since it plays a role in the
formation of anti-inflammatory cytokines such as
interleukin-1 receptor antagonist (IL-1ra) and
interleukin-10 (IL-10).
The appearance of IL-10 and
IL-1ra in the circulation contributes to mediating the
KONAS XI and PIT XVIII PERDOSRI 2019 - The 11th National Congress and The 18th Annual Scientific Meeting of Indonesian Physical
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anti-inflammatory effects of exercise and induces a
reduction in CRP levels and suggests that physical
activity may suppress systemic low-grade
inflammation.
The increased plasma IL-6 is related to exercise
intensity, duration, the mass of muscle recruited and
one’s endurance capacity (Peterson, 2005). Physical
activities with moderate intensity are recommended
to reduce CRP levels (Zonneveld, 2014). IS exercise
in this study counted as moderate intensity based on
Borg scale 11-13. Most of the subjects had the same
occupation as a craftsman and did their daily
activities independently, but still there were no
complete data and objective assessment of physical
activities collected.
The IS exercise given in this study had not
decreased the inflammation marker of CRP. This
study given different result from the previous studies
that after 4 weeks of physical training was
associated with significantly improved plasma
concentrations of adiponectin and CRP (Oberbach,
2006), IS exercise for 4 weeks (twice daily, 30
breaths a set for 30 days) in COPD patients was
already showed a significant result in reducing IL-6
and TNF-α inflammatory cytokines
(Leelarungrayub, 2017), IMT combined with aerobic
training provides additional benefits in functional
and serum biomarkers of inflammation (CRP) in
patients with moderate CHF (Adamapoulos, 2014).
The differences in the type of exercise, the mass of
muscle recruited, the intensity and duration of
exercise compared with the previous study, the
markers of inflammation which had been examined
may make the differences of the result.
The study has shown that IS exercise can
improve lung function in an individual with chronic
SCI. The similar results showed in another previous
study (Kim, 2017). The study has not shown
significant change in the circulating level of CRP
however, a potential local effect of IS on
diaphragmatic myocyte cytokine production cannot
be excluded. Whether there was a reduction in local
diaphragmatic muscle inflammation marker after IS
was not tested in this study.
The IS exercise given in this study had influenced
fat metabolism marked by the significant reduction
of LDL/HDL ratio. IL-6 is the first cytokine
released into the circulation during exercise, derived
from the contracting muscle. This cytokine will
activate lipolysis independently of elevations in
Growth Hormone (GH) and/or cortisol and become a
potent catalyst for fat oxidation in muscle cells
(Peterson, 2005). The present study was given
different result from the previous studies that IMT
with low inspiratory loading fails to demonstrate any
significant improvements in blood glucose levels,
serum lipids, and/or HOMA-IR in female patients
with type 2 diabetes (Ahmad, 2017) and after 7 days
of IMT had not able to change metabolic variables
(blood glucose and lipid profile) in women with
metabolic syndrome (Feriani, 2017).
There are some limitations to this study that can
be improved in future research. Firstly, the present
study did not measure other cytokines, such as IL-10
and IL-1ra may be needed to confirm that the
observed increase in IL-6 is muscle derived and not
due to other factors, such as the existence of a
catabolic/inflammatory state due to exercise training
(Peterson, 2005). Secondly, this study did not have
any data regarding the number of cigarettes (packs
per year) and nicotine levels with distinctive
measurements in each subject which can correlate
with the inflammatory state. Thirdly,
there was no
complete data and objective assessment of physical
activities and nutritional intake collected.
Further study can be conducted by giving longer-
term IS exercise intervention or with other exercise
combinations including aerobics. Assessment of
detail physical activity level, other routine activity
(such as smoking), nutritional status and other anti-
inflammatory cytokine levels should be done in
further study.
5 CONCLUSIONS
A 4 weeks incentive spirometry breathing exercise
resulted in improvement in lung function and lipid
ratio. Improvement in lung function has not
influenced the systemic inflammatory level (CRP),
although a beneficial influence on LDL/HDL ratio
was recorded. Further follow up and studies are
required to establish the role of inspiratory muscles
in improving the systemic inflammatory status of
patients with chronic spinal cord injury.
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