Yoga Practice Has Minor Influence on  Respiratory Function at Rest in   Men and Women

Research background and hypothesis. Hatha yoga breathing has the potential of training the respiratory system in such a way that it helps an individual to cope with the respiratory demand (Ray et al., 2011).Research aim was to compare pulmonary function variables between physically inactive subjects and the ones practicing hatha yoga and to evaluate changes after 6 months of yoga practice in the latter group. Research methods. Pulmonary function was measured by means of the gas analyser “Oxycon Mobile” (Germany) before and after 6 months of yoga training in men (n = 11) (age – 30.8 (7.06), BMI – 25.6 (2.6)) and women (n = 11) (age – 28.9 (6.86), BMI – 22.5 (2.3)) practicing yoga and control subjects (n = 22) of similar age. Measurements included forced vital capacity (FVC), forced expiration volume in one second (FEV(1)), forced inspiratory volume in one second FIV1, vital capacity (VC), peak expiratory flow (PEF), forced expiratory flow rate (FEF (25–75)%), forced inspiratory flow at 50% of the vital capacity (FIF50%), maximum voluntary ventilation (MVV), vital capacity (VC MAX), peak inspiratory flow (PIF), etc.Research results. Pulmonary function measures FEF 75/85 (L/s) (p = 0.036), total volume inspired FVC IN (L) (p = 0.014), FIV1 (L) (p = 0.045) were significantly higher in the group practicing yoga than in the control group of women, and VC MAX (%) (p = 0.018), FEV 1 (%) (p = 0.041), FEF 25 (L/s) (p = 0.017), FVC IN (L) (p = 0.002) in men practicing yoga, than in men not practicing yoga. They also demonstrated higher values of MVV (L/min) (p = 0.068) and FVC (L) (p = 0.050). After 6 months of practicing yoga we found higher FEF 50 (L/s) (p = 0.003), FEF 50% (L/s) (p = 0.003) in women’s group and VCMAX (%) (p = 0.028) in men’s group. We also found a tendency of the increase of VCMAX (L) (p = 0.053), PIF (L/s) (p = 0.051), FVC IN (L) (p = 0.061), FIVI (L) (p = 0.064) indexes in men and PIF (L/s) (p = 0.072), FVC IN (L) (p = 0.076) in women.Discussion and conclusions. Yoga practice appeared to have minor influence on respiratory function at rest in men and women of middle age. Additional studies examining various yoga practices are warranted to gain a more comprehensive understanding of the effects of yoga techniques on pulmonary functions.Keywords: pulmonary function at rest, yoga training, yoga breathing.

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The efficacy of two-year yogic practice on selected pulmonary function test in postmenopausal women

Biomedicine ◽

10.51248/.v39i2.197 ◽

2020 ◽

Vol 39 (2) ◽

pp. 292-297

Author(s):

Bhat Ramesh ◽

Pratik Kumar Chatterjee ◽

Budihal Suman Veerappa ◽

Arun Kumar Nayanatara ◽

Kunal . ◽

...

Keyword(s):

Pulmonary Function ◽

Postmenopausal Women ◽

Vital Capacity ◽

Control Group ◽

Yoga Practice ◽

Group I ◽

Respiratory Parameters ◽

Expiratory Flow ◽

Group Ii ◽

One Year

Introduction and Aim: Menopausal transition has been well associated with a series of hormonal changes that has been linked to impairment of respiratory function. The present study was designed to evaluate the cumulative effect of practicing yoga on certain respiratory parameters in postmenopausal women. Materials and Methods: Sixty postmenopausal women were divided into two groups (n=30 each). Based on the duration of yoga, they were grouped into Group I – (Regularly doing yoga for one year) and Group II (Regularly doing yoga for the two years). The women not doing any yogic exercises were taken as the control group; Group Ia (for One year) and Group II a (for two years). The respiratory parameters were measured with the help of vitalograph. Results: All the observed respiratory parameters such as vital capacity (VC), Forced vital capacity (FVC), FEV1 (Forced expiratory volume during the 1st second.), FEV1 ratio, PEFR (Peak expiratory flow rate). FEF50 (Forced Expiratory Flow at 50%), showed a significant (P<0.0001) improvement in Group II when compared to the Group I. Conclusion: Yoga practice can be advocated to improve pulmonary function tests in post-menopausal women which might help in preventing respiratory diseases during aging process. Optimum benefit of yoga was observed during the two years of yoga practice in the postmenopausal women. Continued practice of yoga might be also considered as a preventive exercise to impair age related morbidity and improve the quality of life.

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Pulmonary function in men after oxygen breathing at 3.0 ATA for 3.5 h

Journal of Applied Physiology ◽

10.1152/jappl.1991.71.3.878 ◽

1991 ◽

Vol 71 (3) ◽

pp. 878-885 ◽

Cited By ~ 24

Author(s):

J. M. Clark ◽

R. M. Jackson ◽

C. J. Lambertsen ◽

R. Gelfand ◽

W. D. Hiller ◽

...

Keyword(s):

Pulmonary Function ◽

Forced Vital Capacity ◽

Vital Capacity ◽

Large Change ◽

Forced Expiratory Volume ◽

Diffusing Capacity ◽

Mild Degree ◽

Oxygen Breathing ◽

Multiple Organs ◽

Expiratory Flow

As a pulmonary component of Predictive Studies V, designed to determine O2 tolerance of multiple organs and systems in humans at 3.0–1.5 ATA, pulmonary function was evaluated at 1.0 ATA in 13 healthy men before and after O2 exposure at 3.0 ATA for 3.5 h. Measurements included flow-volume loops, spirometry, and airway resistance (Raw) (n = 12); CO diffusing capacity (n = 11); closing volumes (n = 6); and air vs. HeO2 forced vital capacity maneuvers (n = 5). Chest discomfort, cough, and dyspnea were experienced during exposure in mild degree by most subjects. Mean forced expiratory volume in 1 s (FEV1) and forced expiratory flow at 25–75% of vital capacity (FEF25–75) were significantly reduced postexposure by 5.9 and 11.8%, respectively, whereas forced vital capacity was not significantly changed. The average difference in maximum midexpiratory flow rates at 50% vital capacity on air and HeO2 was significantly reduced postexposure by 18%. Raw and CO diffusing capacity were not changed postexposure. The relatively large change in FEF25–75 compared with FEV1, the reduction in density dependence of flow, and the normal Raw postexposure are all consistent with flow limitation in peripheral airways as a major cause of the observed reduction in expiratory flow. Postexposure pulmonary function changes in one subject who convulsed at 3.0 h of exposure are compared with corresponding average changes in 12 subjects who did not convulse.

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Evaluation of Major Airway Lesions Using the Flow-Volume Loop

Annals of Otology Rhinology & Laryngology ◽

10.1177/000348947508400514 ◽

1975 ◽

Vol 84 (5) ◽

pp. 635-642 ◽

Cited By ~ 14

Author(s):

Robert E. Hyatt

Keyword(s):

Vital Capacity ◽

Inspiratory Flow ◽

Flow Volume ◽

Flow Volume Loop ◽

Expiratory Flow

The flow-volume (FV) loop is another way of representing spirometric data from combinations of forced expiratory and forced inspiratory vital capacity breaths. The FV loop is of use in identifying, and often localizing, lesions of the larynx and the trachea (down to the carina). Three general patterns have been recognized. When the lesion behaves in a fixed fashion (as might occur with an artificial orifice), maximal expiratory and inspiratory flows are almost equally compromised. This results in a rectangular FV loop, irrespective of whether the lesion is located intrathoracically or extrathoracically. When the lesion behaves in a variable fashion, two distinct patterns are seen, depending on the location of the lesion (intrathoracic or extrathoracic). The variable lesion acts as a fixed lesion during one phase of forced respiration only. The extrathoracic variable lesion results in a predominant reduction in forced inspiratory flow, with little effect on expiratory flow, whereas the intrathoracic variable lesion produces a characteristic reduction in expiratory flow. These patterns reflect the transmural forces existing at the site of the lesion.

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Forced vital capacity (FVC), peaked expiratory flow rate (PEFR), are additional parameters in the assessment of the reversibility test.

Journal of the Faculty of Medicine Baghdad ◽

10.32007/jfacmedbagdad.v60i1.35 ◽

2018 ◽

Vol 60 (1) ◽

pp. 24-27

Author(s):

Mustafa N. Abd Ali ◽

Ahmed H. Jasim ◽

Abdulrasool N. Nassr ◽

Monqith A. Kaddish

Keyword(s):

Pulmonary Function ◽

Airway Obstruction ◽

Flow Rate ◽

Forced Vital Capacity ◽

Social Order ◽

Vital Capacity ◽

Chronic Obstructive ◽

P Value ◽

Cross Sectional ◽

Expiratory Flow

Background: Spirometry is an important test performed in patients expect to have airway obstruction, assessment of intense reaction to inhalers (the trial of reversibility of airway blockade) is a normally utilized technique in clinical and academic studies. The consequences of this test are utilized to take choices on treatment, consideration, exclusion from diagnosis and other research think about, and for analytic marking [asthma versus chronic obstructive airway disease (COPD)]. Usually, the (FEV1) or (FVC) standards before and after giving of the bronchodilator are compared and the adjustment is processed to distinguish variations from the norm in lung volumes and air flow.Objective: The aim of this study was to investigate the effectiveness of FVC and PEFR as further constraints to evaluate bronchodilator reaction in asthmatic peoples with severe or moderate airflow blockade.Patients and methods: This study is cross sectional study performed in Baghdad teaching hospital where one hundred patient were enrolled in this study patients were detected with asthma and confirm airway blockade according to (GINA) guide lines. The pulmonary function for all members was investigated with a convenient spirometer (spiro-lab3 Spirometer) as stated by those measures from claiming American thoracic particular social order, The mean and standard deviation results of the predicted% values pulmonary function test were also used for comparisons were measured by t-test. A p-value of ≤ 0.05 considered to be significant statistically.Results: The post bronchodilator (post –BD) results of FVC, PEFR are greater than pre- bronchodilator where are statistically significant P value = 0.00. the amount of the changes of FVC post (BD) was more than 400ml from pre (BD) and the amount of the changes of PEFR post (BD) more than 1000ml from the pre (BD) both were p-value = 0.00.Conclusion: The asthmatic patients with moderate and severe airway obstruction, we observed that FVC and PEFR is a valuable important limit to FEV1 to evaluate reversibility reactionKeyword: forced vital capacity(FVC), peaked expiratory flow rate (PEFR), spirometry and forced expiratory volume in 1st second (FEV1). السعة الحيويه القصوى ومعدل الجريان الزفيري الاعلى وصفات اضافية في تقييم اختبار المعاكسه القصبيه أ.د. مصطفى نعمه عبد علي احمد حسين جاسم عبد الرسول نوري نصر منقذ عبد المحسن كاظم الخلاصه : خلفية البحث : ان جهاز قياس التنفس هو وسيله لقياس تضيق المجاري الهوائية ومدى استجابتها لموسع القصبات عند التشخيص للحالات السريريه , وفي تحديد نوع العلاج , وفي التمييز بين الربو القصبي وانسداد القصبات المزمن . في هذا البحث تم قياس السعة الحيويه القصوى والحجم الزفيري الاعلى في الثانيه وذلك قبل وبعد اعطاء موسع القصبات وقياس الفرق في الحالات الطبيعيه لحجوم الرئه وجريان الهواء فيها . هدف البحث : استخدام عنصر السعة الحيويه القصوى وعنصر معدل الجريان الزفيري الاعلى كعوامل اضافية لتقييم اختبار توسع القصبات في مرضىالربو القصبي ذوي تضيق القصبات المتوسط والشديد. المرضى وطرق العمل:اجريت دراسه مقطعيه في مستشفى بغداد التعليمي على 100 مريض يعانون من الربو مع تضيق المجاري الهوائية حسب التصنيف العالمي (GINA) , وقد اجريت لهم وظائف الرئه . تم استخدام اختبار - testt و p – value على مستوى معنويه اقل او يساوي 0.05. النتائج : اظهرت نتائج السعة الحيويه ومعدل الجريان الزفيري الاعلى بعد اعطاء موسع القصبات هي اكبر من قبل اعطائه مع قيمة p- value تساوي صفر .كما ان معدل التغيير للسعة الحيويه بعد اعطاء موسع القصبات كانت اكثر من 400ml من قبل اعطاء موسع القصبات . وقد بلغ معدل التغيير في الجريان الزفيري الاعلى بعد اعطاء موسع القصبات اكثر من 1000ml بالمقارنة ما قبل اعطاء موسع القصبات , وكانت p- value تساوي صفر . الاستنتاج : في هذا البحث ,كانت السعة الحيويه القصوى ومعدل الجريان الزفيري الاعلى لمرضى الربو القصبي ذات قيمه مهمه لدعم الحجم الزفيري الاقصى في الثانية الاولى لتقييم تفاعل المعاكسة لتوسع القصبات . مفتاح الكلمات : السعه الحيوية القصوى , معدل الجريان الزفيري الاعلى , جهاز قياس التنفس , لحجم الزفيري الاقصى في الثانية الاولى

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Positive effort dependence of maximal expiratory flow

Journal of Applied Physiology ◽

10.1152/jappl.1987.62.2.718 ◽

1987 ◽

Vol 62 (2) ◽

pp. 718-724 ◽

Cited By ~ 6

Author(s):

J. L. Allen ◽

R. G. Castile ◽

J. Mead

Keyword(s):

Chest Wall ◽

Conformational Changes ◽

Vital Capacity ◽

Transpulmonary Pressure ◽

Normal Subjects ◽

Forced Expiration ◽

Respiratory Inductive Plethysmography ◽

Maximal Expiratory Flow ◽

Expiratory Flow ◽

Normal Males

The maximal expiratory-flow volume (MEFV) curve in normal subjects is thought to be relatively effort independent over most of the vital capacity (VC). We studied seven normal males and found positive effort dependence of maximal expiratory flow between 50 and 80% VC in five of them, as demonstrated by standard isovolume pressure-flow (IVPF) curves. We then attempted to distinguish the effects of chest wall conformational changes from possible mechanisms intrinsic to the lungs as an explanation for positive effort dependence. IVPF curves were repeated in four of the subjects who had demonstrated positive effort dependence. Transpulmonary pressure was varied by introducing varied resistances at the mouth but effort, as defined by pleural pressure, was maintained constant. By this method, chest wall conformation at a given volume would be expected to remain the same despite changing transpulmonary pressures. When these four subjects were retested in this way, no increases in flow with increasing transpulmonary pressure were found. In further studies, voluntarily altering the chest wall pattern of emptying (as defined by respiratory inductive plethysmography) did however alter maximal expiratory flows, with transpulmonary pressure maintained constant. We conclude that maximal expiratory flow can increase with effort over a larger portion of the vital capacity than is commonly recognized, and this effort dependence may be the result of changes in central airway mechanical properties that occur in relation to changes in chest wall shape during forced expiration.

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In-brace alterations of pulmonary functions in adolescents wearing a brace for idiopathic scoliosis

Prosthetics and Orthotics International ◽

10.1177/0309364619839856 ◽

2019 ◽

Vol 43 (4) ◽

pp. 434-439 ◽

Cited By ~ 3

Author(s):

Gozde Yagci ◽

Gokhan Demirkiran ◽

Yavuz Yakut

Keyword(s):

Idiopathic Scoliosis ◽

Pulmonary Function ◽

Peak Expiratory Flow ◽

Forced Vital Capacity ◽

Respiratory Muscle ◽

Vital Capacity ◽

Forced Expiratory Volume ◽

Pulmonary Functions ◽

Significant Difference ◽

Expiratory Flow

Background:Despite the common use of braces to prevent curve progression in idiopathic scoliosis, their functional effects on respiratory mechanics have not been widely studied.Objective:The objective was to determine the effects of bracing on pulmonary function in idiopathic scoliosis.Methods:A total of 27 adolescents with a mean age of 14.5 ± 1.5 years and idiopathic scoliosis were included in the study. Pulmonary function evaluation included vital capacity, forced expiratory volume, forced vital capacity, maximum ventilator volume, peak expiratory flow, and respiratory muscle strengths, measured with a spirometer, and patient-reported degree of dyspnea. The tests were performed once prior to bracing and at 1 month after bracing (while the patients wore the brace).Results:Compared with the unbraced condition, vital capacity, forced expiratory volume, forced vital capacity, maximum ventilator volume, and peak expiratory flow values decreased and dyspnea increased in the braced condition. Respiratory muscle strength was under the norm in both unbraced and braced conditions, while no significant difference was found for these parameters between the two conditions.Conclusion:The spinal brace for idiopathic scoliosis tended to reduce pulmonary functions and increase dyspnea symptoms (when wearing a brace) in this study. Special attention should be paid in-brace effects on pulmonary functions in idiopathic scoliosis.Clinical relevanceBracing seems to mimic restrictive pulmonary disease, although there is no actual disease when the brace is removed. This study suggests that bracing may result in a deterioration of pulmonary function when adolescents with idiopathic scoliosis are wearing a brace.

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Accelerometry of Adductor Pollicis Muscle Predicts Recovery of Respiratory Function from Meeting Abstracts

Anesthesiology ◽

10.1097/00000542-200306000-00006 ◽

2003 ◽

Vol 98 (6) ◽

pp. 1333-1337 ◽

Cited By ~ 130

Author(s):

Matthias Eikermann ◽

Harald Groeben ◽

Johannes Hüsing ◽

Jürgen Peters

Keyword(s):

Airway Obstruction ◽

Neuromuscular Blockade ◽

Forced Vital Capacity ◽

Respiratory Function ◽

Vital Capacity ◽

Upper Airway ◽

Inspiratory Flow ◽

Upper Airway Obstruction ◽

Residual Paralysis ◽

Adductor Pollicis Muscle

Background Residual paralysis increases the risk of pulmonary complications but is difficult to detect. To test the hypothesis that accelerometry predicts effects of residual paralysis on pulmonary and upper airway function, the authors related tests of pulmonary and pharyngeal function to accelerometry of adductor pollicis muscle in 12 partially paralyzed volunteers. Methods Rocuronium (0.01 mg/kg + 2-10 microg x kg-1 x min-1) was administered to maintain train-of-four (TOF) ratios (assessed every 15 s) of approximately 0.5 and 0.8 over a period of more than 5 min. The authors evaluated pharyngeal and facial muscle functions during steady state relaxation and performed spirometric measurements every 5 min until recovery. Upper airway obstruction was defined as a mean ratio of expiratory and inspiratory flow at 50% of vital capacity of greater than 1. The TOF ratio associated with "acceptable" pulmonary recovery (forced vital capacity and forced inspiratory volume in 1 s of > or =90% of baseline) was calculated using a linear regression model. Results At peak blockade (TOF ratio 0.5 +/- 0.16), forced inspiratory flow was impaired (53 +/- 19%) to a greater degree than forced expiratory flow (75 +/- 20%) with a mean ratio of expiratory and inspiratory flow at 50% of vital capacity of 1.18 +/- 0.6. Upper airway obstruction, observed in 8 of 12 volunteers, paralleled an impaired ability to swallow reported by 10 of 12 volunteers. In contrast, all volunteers except one could sustain a head lift for more than 5 s. The authors calculated that a mean TOF ratio of 0.56 (95% confidence interval, 0.22-0.71) predicts "acceptable" recovery of forced vital capacity, whereas forced inspiratory volume in 1 s was impaired until a TOF ratio of 0.95 (0.82-1.18) was reached. A 100% recovery of TOF ratio predicts an acceptable recovery of forced vital capacity, forced inspiratory volume in 1 s, and mean ratio of expiratory and inspiratory flow at 50% of vital capacity in 93%, 73%, and 88% of measurements (calculated negative predictive values), respectively. Conclusion Impaired inspiratory flow and upper airway obstruction frequently occur during minimal neuromuscular blockade (TOF ratio 0.8), and extubation may put the patient at risk. Although a TOF ratio of unity predicts a high probability of adequate recovery from neuromuscular blockade, respiratory function can still be impaired.

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OBSTRUCTIVE DISEASE OF THE AIRWAYS IN CYSTIC FIBROSIS

PEDIATRICS ◽

10.1542/peds.41.3.560 ◽

1968 ◽

Vol 41 (3) ◽

pp. 560-573

Author(s):

Robert B. Mellins ◽

O. Robert Levine ◽

Roland H. Ingram ◽

Alfred P. Fishman

Keyword(s):

Cystic Fibrosis ◽

Vital Capacity ◽

Maximum Flow ◽

Transpulmonary Pressure ◽

Forced Expiration ◽

Lung Volumes ◽

Flow Rates ◽

Maximum Expiratory Flow ◽

Expiratory Flow ◽

Expiratory Flow Rates

A study of the interrelationships of instantaneous air flow, lung volume, and transpulmonary pressure over the range of the vital capacity has demonstrated striking differences in the determinants of maximum expiratory flow in cystic fibrosis and asthma. At high lung volumes, maximum expiratory flow rates in asthma are limited by the mechanical characteristics of the lungs and airways, whereas in cystic fibrosis and in the normal they are dependent on effort. At lower lung volumes, maximum expiratory flow rates are relatively more reduced in cystic fibrosis than in asthma and pressures in excess of those required to produce maximum flow actually depress flow. Also, forced expiration is associated with a transient reversal in the slope of the single breath nitrogen curve in cystic fibrosis and not in asthma. From these studies it is concluded that: (1) airway obstruction is less uniform and involves larger airways in cystic fibrosis than in asthma, and (2) increased expiratory pressure is associated with collapse of some of the larger airways over most of the range of the vital capacity in cystic fibrosis. A major clinical implication of these studies is that the effectiveness of cough is impaired by large airway collapse in cystic fibrosis.

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Peak In- and Expiratory Flow Revisited: Reliability and Reference Values in Adults

Respiration ◽

10.1159/000511694 ◽

2021 ◽

pp. 1-8

Author(s):

Shane Hanon ◽

Eef Vanderhelst ◽

Walter Vincken ◽

Daniel Schuermans ◽

Sylvia Verbanck

Keyword(s):

Clinical Practice ◽

Reference Values ◽

Intraclass Correlation ◽

Inspiratory Flow ◽

Forced Expiration ◽

Flow Measurements ◽

Flow Rates ◽

Reference Equations ◽

Expiratory Flow ◽

Age Range

Background: While peak in- and expiratory flow rates offer valuable information for diagnosis and monitoring in respiratory disease, these indices are usually considered too variable to be routinely used for quantification in clinical practice. Objectives: The aim of the study was to obtain reproducible measurements of maximal inspiratory flow rates and to construct reference equations for peak in- and expiratory flows (PIF and PEF). Method: With coaching for maximal effort, 187 healthy Caucasian subjects (20–80 years) performed at least 3 combined forced inspiratory and expiratory manoeuvres, until at least 2 peak inspiratory flow measurements were within 10% of each other. The effect on PIF preceded by a slow expiration instead of a forced expiration and PIF repeatability over 3 different days was also investigated in subgroups. Reference values and limits of normal for PIF, mid-inspiratory flow, and PEF were obtained according to the Lambda-Mu-Sigma statistical method. Results: A valid PIF could be obtained within 3.3 ± 0.6(SD) attempts, resulting in an overall within-test PIF variability of 4.6 ± 3.2(SD)%. A slow instead of a forced expiration prior to forced inspiration resulted in a significant (p < 0.001) but small PIF increase (2.5% on average). Intraclass correlation coefficient for between-day PIF was 0.981 (95% CI: 0.960–0.992). Over the entire age range, inter-subject PIF variability was smaller than in previous reports, and PIF could be predicted based on its determinants gender, age, and height (r2 = 0.53). Conclusions: When adhering to similar criteria for the measurement of effort-dependent portions of inspiratory and expiratory flow-volume curves, performed according to current ATS/ERS standards, it is possible to obtain reproducible PIF and PEF values for use in routine clinical practice.

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Effects of Physical Exercises on Pulmonary Rehabilitation, Exercise Capacity, and Quality of Life in Children with Asthma: A Meta-Analysis

Evidence-based Complementary and Alternative Medicine ◽

10.1155/2021/5104102 ◽

2021 ◽

Vol 2021 ◽

pp. 1-12

Author(s):

YiRan Liu ◽

Yan Zhao ◽

Fang Liu ◽

Lin Liu

Keyword(s):

Quality Of Life ◽

Pulmonary Function ◽

Exercise Capacity ◽

Bronchial Asthma ◽

Vital Capacity ◽

Meta Analysis ◽

Current Evidence ◽

Children With Asthma ◽

Expiratory Flow

Objective. This study aimed to systematically evaluate the effect of exercise on pulmonary function, exercise capacity, and quality of life in children with bronchial asthma. Methods. A comprehensive search was performed using PubMed, Cochrane Library, Web of Science, EBSCO, CNKI, and Wanfang Data Knowledge Service platform to identify any relevant randomized controlled trials (RCTs) published from inception to April 2021. The Cochrane risk of the bias tool was utilized to evaluate the methodological quality of the included studies, and RevMan 5.3 was applied to perform data analyses. Results. A total of 22 RCTs involving 1346 patients were included. The results of the meta-analysis showed that exercise had significant advantages in improving lung function and exercising capacity and quality of life in children with asthma compared with conventional treatment, such as the forced vital capacity to predicted value ratio (SMD = 0.27; 95% CI: 0.13, 0.40, and P < 0.0001 ), the peak expiratory flow to predicted value ratio (MD = 4.53; 95% CI: 1.27, 7.80, and P = 0.007 ), the 6-minute walk test (MD = 110.65; 95% CI: 31.95, 189.34, and P = 0.006 ), rating of perceived effort (MD = −2.28; 95% CI: −3.21, −1.36, and P < 0.0001 ), and peak power (MD = 0.94; 95% CI: 0.37, 1.52, and P = 0.001 ) on exercise capacity and pediatric asthma quality of life questionnaire (MD = 1.28; 95% CI: 0.60, 1.95, and P = 0.0002 ) on quality of life. However, no significant difference was observed in the forced expiratory flow between 25% and 75% of vital capacity P = 0.25 and the forced expiratory volume at 1 second to predicted value ratio P = 0.07 . Conclusions. Current evidence shows that exercise has a certain effect on improving pulmonary function recovery, exercise capacity, and quality of life in children with bronchial asthma. Given the limitation of the number and quality of included studies, further research and verification are needed to guide clinical application.

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