The aim of the present study was to examine the effects of a course of aerobic exercise on pulmonary function and tolerance of activity in asthmatic patients.  
Among the asthmatic patients, 36 patients (M= 16, F= 20) were chosen after clinical examinations, pulmonary function test, skin prick test (SPT) for aeroallergen and a six minute walk test (6MWT) on their own free will. A patient was said to have Exercise Induced Asthma (EIA) when he/she fulfilled the following criteria; (1) FEV1 < 80%, (2) 12% increase or more in FEV1 or PEF after short-acting ß2 agonist prescription and (3) 15% decrease in FEV1 or PEF after 6MWT with 70% or 80% of maximum heart rate. The patients were randomly put into two groups of case (M=8, F=10, Mean age=27) and control (M=8, F=10, Mean age=29). Case group participated in eight-week aerobic exercise plan, while control group had no plan of exercise. Pulmonary function tests were done before and after the course of exercise.
There were significant changes in FEV1, FVC, PEF, FEF25-75%, MVV, RF and 6MWT between asthmatic patients of the two groups (P≤0.05), but FEV1/FVC showed no significant change. Mean of changes in FEV1, FVC, PEF, FEF25-75%, MVV, RF and 6MWT were –25.56, -17.19, 32.09, -27.93, -22.18, 5.63 and –307.5 in case group respectively while they were 6.2, 4.67, 1.96, 6.65, 15.56,-2.87 and 18.78 in the control group. 
This study shows that aerobic exercises in asthmatic patients lead to an improvement in pulmonary functions. Aerobic exercise rehabilitation can be a complement to medical treatment of asthma

"Reza Farid

Ahmad Ebrahimi Atri

Asghar Khaledan

Farahzad Jabbari Azad

Javad Ghafari

Mahmoud Baradaran Rahimi

Mojtaba Talaei-Khoei

Ramin Ghasemi "

Iranian Journal of Allergy Asthma and Immunology

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Vol. 4, No. 3, September 2005             IRANIAN JOURNAL OF ALLERGY, ASTHMA AND IMMUNOLOGY /133 Effect of Aerobic Exercise Training on Pulmonary Function  and Tolerance of Activity in Asthmatic Patients  Reza Farid1, Farahzad Jabbari Azad1, Ahmad Ebrahimi Atri2, Mahmoud Baradaran Rahimi1, Asghar Khaledan3, Mojtaba Talaei-Khoei1, Javad Ghafari1, and Ramin Ghasemi1  1 Department of Immunology and Allergy, Ghaem Medical Center, Mashhad University of Medical Sciences, Mashhad, Iran  2 College of Physical Education and Sport Sciences, Ferdowsi University of Mashhad, Mashhad, Iran 3 College of Physical Education and Sport Sciences, Tehran University, Tehran, Iran  ABSTRACT  The aim of the present study was to examine the effects of a course of aerobic exercise on pulmonary function and tolerance of activity in asthmatic patients.   Among the asthmatic patients, 36 patients (M= 16, F= 20) were chosen after clinical examinations, pulmonary function test, skin prick test (SPT) for aeroallergen and a six minute walk test (6MWT) on their own free will. A patient was said to have Exercise Induced Asthma (EIA) when he/she fulfilled the following criteria; (1) FEV1 < 80%, (2) 12% increase or more in FEV1 or PEF after short-acting ß2 agonist prescription and (3) 15% decrease in FEV1 or PEF after 6MWT with 70% or 80% of maximum heart rate. The patients were randomly put into two groups of case (M=8, F=10, Mean age=27) and control (M=8, F=10, Mean age=29). Case group participated in eight-week aerobic exercise plan, while control group had no plan of exercise. Pulmonary function tests were done before and after the course of exercise. There were significant changes in FEV1, FVC, PEF, FEF25-75%, MVV, RF and 6MWT between asthmatic patients of the two groups (P≤0.05), but FEV1/FVC showed no significant change. Mean of changes in FEV1, FVC, PEF, FEF25-75%, MVV, RF and 6MWT were –25.56, -17.19, 32.09, -27.93, -22.18, 5.63 and –307.5 in case group respectively while they were 6.2, 4.67, 1.96, 6.65, 15.56,-2.87 and 18.78 in the control group.  This study shows that aerobic exercises in asthmatic patients lead to an improvement in pulmonary functions. Aerobic exercise rehabilitation can be a complement to medical treatment of asthma.  Keywords: Aerobic exercise; Asthma; Pulmonary function test   INTRODUCTION  Asthma is a chronic inflammatory disease of the respiratory system. Its incidence has been increasing in the last 20 years in many countries all around the world. It is said that 10 percent of people in developed countries suffer from asthma.1  Corresponding Author: Reza Farid, MD;  Ghaem Medical Center, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran. Tel: (+98 511) 8428 014,  Fax: (+98 511) 7610 681, E-mail: rfaridh@yahoo.com  The main goal in the treatment of asthma is to prevent signs and symptoms of asthma, decreasing medication intake, improvement of respiratory system and increasing the patient’s function and quality of life.  Asthmatic patients do not intend to engage in sports and physical exercises due to dyspnea and it leads to decrease in their levels of physical abilities and thus increasing their respiratory problems. In a study, sport exercises were called to be the main cause  Aerobic Exercise and Asthma 134/ IRANIAN JOURNAL OF ALLERGY, ASTHMA AND IMMUNOLOGY              Vol. 4, No. 3, September 2005 0102030405060708090pre test post testcasecontrol Figure 1. Mean FEV1 in pre and post test in case and control groups.  of narrowness of airways in ninety percent of asthmatic patients.2 Several studies were done to investigate the effects of physical activities and sport exercises on pulmonary function in asthmatic patients. These studies had different results which can be explained due to their variety in the kind of tests, measurement tools, exercise schedule and program, disease severity, pulmonary rehabilitation and environmental conditions.2-5 A regular short duration sports activity (less than a few minutes) has fewer problems than long duration sports activity. When courses of exercise within short intervals are embarked, narrowness of bronchus increases gradually. On the contrary, doing light sport exercises before strenuous sport activities can reduce stricture of respiratory airways to minimum.6,7  MATERIALS AND METHODS  Among the patients complaining of asthmatic symptoms who were referred to Dr. Farid Allergy Clinic, 36 patients (M=16, F=20) were chosen on their own free will after confirmation of their asthma with clinical examinations, pulmonary function tests, skin prick test (SPT) for aeroallergen and a six minute walk test (6MWT).  The chosen patients were said to have exercise induced asthma (EIA) when they had FEV1 less than eighty percent and after inhalation of short acting β2-agonist, a twelve percent or more increase was seen in their FEV1 or PEF,8 and the after six minute walk test (6MWT) on the treadmill with 70-80% of maximum heart rate, they showed a fifteen percent decrease in FEV1 or PEF in comparison to what they were before any activity.9-11  Our patients had no problem in cardiovascular and musculoskeletal systems and had no other pulmonary disease. The patients were randomly put into two groups of case (M=8, F=10, Mean age=27) and control (M=8, F=10, Mean age=29).  The case group participated in an eight-week aerobic exercise plan (three 20 minute sessions of aerobic exercise in a week with 15 minutes of warming up and tensile exercise before aerobic practice), while  control group had no plan of exercise during this period of time. Pulmonary function test such as spirometry are the main procedures which are used for lung volumes, lung capacity and respiratory air way resistance.12  Spirometry included FEV1, FVC, FEV1/FVC, PEF, FEF 25%-75%, MVV, RF and 6MWT were done before exercise commencement and at the end of eighth week in both the two groups.  RESULTS  The mean of FEV1changes in the case group before and after the test was -25.56 and in the control group was 6.2 (Figure 1), thus there was statistically significant difference between the two groups (P≤ 0.05). FEV1 R. Farid, et al. Vol. 4, No. 3, September 2005             IRANIAN JOURNAL OF ALLERGY, ASTHMA AND IMMUNOLOGY /135 0102030405060708090100pre test post testcasecontrol Figure 2. Mean FVC in pre test and post test in case and control groups.  The mean of changes in the FVC before and after the test in the case and the control groups were 17.19 and 4.67 respectively (Figure 2), which was statistically significant (P≤ 0.05). However, there was no significant difference between means of changes in FEV1/FVC before and after the test in case and control groups (-11.1 and 4.81 respectively) (Figure 3). The mean of changes in the PEF of the case group before and after the test was -32.9 and in control group was 1.96 (Figure 4) which showed statistically significant difference (p≤0.05). Significant difference (p≤0.05) was also shown in mean of FEF 25%-75% changes in case and control group (-27.93 and 6.65 respectively) (Figure 5). The means of changes in MVV, RF and 6MWT of case group before and after the test were -22.18, 5.63 and –307.5, while they were 15.56,-2.87 and 18.78 in control group respectively. These changes were also statistically significant (P≤0.05).  DISCUSSION  Measurement of FEV1 showed an increase in the case group but decrease in the control group after engaging in an eight week aerobic exercise plan. It can be explained that as both groups had similar conditions at the beginning of the study, aerobic exercise caused the increase among the asthmatic patients.  Table 1. Mean of changes in spirometry indexes (pre test and post test) in case and control groups. Statistical indexes  variables Study groups Pre test x+/-SD Post test x+/- SD Mean of change (case group) Mean of change (control group ) Mean of change in study (post test) P value Significant differences Case 59.33+/- 11.40 84.89+/-11.38 FEV1 Control 61.28+/- 13.88 55.08+/-14.30 -25.56 6.2 29.81 0.000 significant Case 69.36+/- 13.48 86.55+/-8.32 FVC Control 65.78+/- 18.27 61.11+/-14.66 -17.19 4.67 25.44 0.000 significant Case 90.55+/-20.95 101.65+/-12.60 FEV1/FVC Control 98.98+/- 16.35 94.17+/-15.19 -11.1 4.81 7.488 0.117 not significant Case 53.02+/-20.15 85.11+/-16.59 PEF Control 49.13+/-20.44 47.17+/-25.75 -32.09 1.96 37.93 0.000 significant Case 46.81+/-22.36 74.74+/-22.17 FEF 25-75% Control 50.30 +/-22.60 43.65+/-21.73 -27.93 6.65 31.08 0.000 significant Case 63.99+/-18.69 86.17+/-13.21 MVV Control 52.22+/-22.03 36.66+/-12.37 -22.18 15.56 49.5 0.000 significant FVC Aerobic Exercise and Asthma 136/ IRANIAN JOURNAL OF ALLERGY, ASTHMA AND IMMUNOLOGY              Vol. 4, No. 3, September 2005 859095100105pre test post testcase control Figure 3. Mean FEV1/FVC in pre test and post test in case and control groups.   0102030405060708090pre test post testcase control Figure 4. Mean PEF in pre test and post test in case and control groups.  Our results correspond with Emtener’s results who prescribed ten week rehabilitation exercise in water for asthmatic patients13 and also with Beri who showed an increase in FEV1 in fourteen patients after doing swimming exercise.14 However, our results had no conformity with the study done by Farzad Ghafoori.15 This could be attributed to the difference in the administrative protocol (Sport program) in the two studies. In our study, patients performed aerobic exercise three sessions in every week for eight weeks, but in Ghafoori’s study, asthmatic patients did tensile exercise for one session after which effects of such an exercise on FEV1 changes were measured.   020406080pre test post testcase control Figure 5. Mean FEF25-75% in pre test and post test in case and control groups.  FEV1/FVC PEF FEF25-75% R. Farid, et al. Vol. 4, No. 3, September 2005             IRANIAN JOURNAL OF ALLERGY, ASTHMA AND IMMUNOLOGY /137 One of the important advantages of sport activity in asthmatic patients is their accumulative desensitization on fear of dyspnea.16 The physical exercises can increase the asthmatic patients’ residual air flow and decrease the ventilation with reinforcement of bronchi expansion during an exercise.  This makes an asthmatic patient save a air flow during exercise.17 Less than five minute sport activities with low severity can improve asthma and its symptoms.18 In a study, patients started the exercise with four and half minutes of walking and thirty seconds of jogging in the first week. In the next weeks, walking time was decreased and jogging time was increased gradually as in the end of the eight week, patients had no discomfort feeling or dyspnea with the pattern of ten minute walking and ten minute jogging. Studies show that sport exercises can increase residual air flow in asthmatic patients.19 Our study also showed that asthmatic patients were able to have more powerful and more effective inspiration and expiration after three sessions of eight weeks of aerobic sport exercises as opposed to what they had been able to do before participating in such aerobic sport exercises.   In conclusion, this study shows that a course of aerobic sport exercise causes an obvious increase in FEV1, FVC, PEF, FEF 25%-75% in asthmatic patients, and a regular aerobic sports program can be complementary to medical treatment in asthma rehabilitation. Our results may suggest that the method of exercising and regular short duration sports activity are involved in the improvement of pulmonary function. Therefore in each study the methods which are used should be considered for result interpretation.   ACKNOWLEDGMENTS  We gratefully acknowledge Dr. F. Bagherzade, Dr. M. Goudarzi, Dr. T. Aminian, Dr. H. Asadi, and also Tehran University and Ferdowsi University of Mashad for their cooperation and their excellent financial assistance.    REFERENCES  1. Moein M. editor. Asthma; basic and clinical sciences. Tehran: Tehran University Publishing Center, 2003: 22-4. 2. William S. Can regular exercise program improve your patient,s asthma? Torax 1990; 45:345-51. 3. Elpern EH, Stevens D, Kesten S. Variability in performance of timed walk tests in pulmonary rehabilitation programs. Chest 2000; 118(1):98-105.  4. Emtner M, Herala M, Stalenheim G. High-intensity physical training in adults with asthma. A 10-week rehabilitation program. Chest 1996; 109(2):323-30.  5. Bendstrup KE, Ingemann Jensen J, Holm S, Bengtsson B. Out-patient rehabilitation improves activities of daily living, quality of life and exercise tolerance in chronic obstructive pulmonary disease. Eur Respir J 1997; 10(12):2801-6.  6. Belman MJ, Kendregan BA. Exercise training fails to increase skeletal muscle enzymes in patients with chronic obstructive pulmonary disease. Am Rev Respir Dis 1981; 123(3):256-61. 7. Siegel W, Blomqvist G, Mitchell JH. Effects of a quantitated physical training program on middle-aged sedentary men. Circulation 1970; 41(1):19-29. 8. Edington and Vadgerton , Biology of Exercise, Translated by Dr. Hojatollah Nikbakht, 1993; 280. 9. Walling AD, Management of exercise-induced asthma: American family physician , 2000;830. 10. Kukafka DS, Lang DM, Porter S, Rogers J, Ciccolella D, Polansky M, et al. Exercise-induced bronchospasm in high school athletes via a free running test: incidence and epidemiology. Chest 1998; 114(6):1613-22. 11. Virant FS. Exercise-induced bronchospasm: epidemiology, pathophysiology, and therapy. Med Sci Sports Exerc 1992; 24(8):851-5. 12. Wagner jack :pulmonary function testing . A practical approach :Williams and Wilkins , 1966; 251-2. 13. Emtner M, Herala M, Stalenheim G. High-intensity physical training in adults with asthma. A 10-week rehabilitation program. Chest 1996; 109(2):323-30. 14. Berry MJ, Walschlager SA. Exercise training and chronic obstructive pulmonary disease: past and future research directions. J Cardiopulm Rehabil 1998; 18(3):181-91. 15. Ghafoori F, editor. Effects of stretching exercises before physical activity on asthmatic patients, Thesis for master of sciences, College of physical education and sport sciences. Tehran: Tehran University 1993: 75-6. Aerobic Exercise and Asthma 138/ IRANIAN JOURNAL OF ALLERGY, ASTHMA AND IMMUNOLOGY              Vol. 4, No. 3, September 2005 16. Moser KM, Bokinsky GE, Savage RT, Archibald CJ, Hansen PR. Results of a comprehensive rehabilitation program. Physiologic and functional effects on patients with chronic obstructive pulmonary disease. Arch Intern Med 1980; 140(12):1596-601. 17. Patessio A, Donner CF. Selection criteria for exercise training in patients with COPD. Z Kardiol 1994; 83(Suppl 3):155-8. 18. Katz RM. Prevention with and without the use of medications for exercise-induced asthma. Med Sci Sports Exerc 1986; 18(3):331-3.  19. William M, Katch F, Katch V, editors. Essentials of exercise physiology. USA: Williams and Wilkins, 2000: 239.  

"Effect of Aerobic Exercise Training on Pulmonary Function and Tolerance of Activity in Asthmatic Patients "

The aim of the present study was to examine the effects of a course of aerobic exercise on pulmonary function and tolerance of activity in asthmatic patients. Among the asthmatic patients, 36 patients (M = 16, F = 20) were chosen after clinical examinations, pulmonary function test, skin prick test (SPT) for aeroallergen and a six minute walk test (6MWT) on their own free will. A patient was said to have Exercise Induced Asthma (EIA) when he/she fulfilled the following criteria; (1) FEV1 &lt; 80%, (2) 12 % increase or more in FEV1 or PEF after short-acting ß2 agonist prescription and (3) 15 % decrease in FEV1 or PEF after 6MWT with 70 % or 80 % of maximum heart rate. The patients were randomly put into two groups of case (M=8, F=10, Mean age=27) and control (M=8, F=10, Mean age=29). Case group participated in eight-week aerobic exercise plan, while control group had no plan of exercise. Pulmonary function tests were done before and after the course of exercise. There were significant changes in FEV1, FVC, PEF, FEF25-75%, MVV, RF and 6MWT between asthmatic patients of the two groups (P≤0.05), but FEV1/FVC showe

Reza Farid

Mojtaba Talaei-khoei

Ramin Ghasemi

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Effect of aerobic exercise training on pulmonary function and tolerance of activity in asthmatic patients

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"Effect of Aerobic Exercise Training on Pulmonary Function and Tolerance of Activity in Asthmatic Patients "

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