The purpose of this study was to determine the acute effect of high intensity interval exercise on respiratory function and rhinitis symptoms in allergic rhinitis patients.
Twelve patients with allergic rhinitis aged between 19 and 31 years who had a positive skin prick test to house dust mite (D. pteronyssinus). The experiment was a crossover design in which each participant was given two types of high-intensity interval training exercise (HIT): HIT 1:1 (high intensity for 1 minute at 85-90% of maximum heart rate, then alternating with low intensity 50-55% of maximum heart rate for 1 minute) and HIT 1:2 (high intensity for 1 minute at 85-90% of maximum heart rate, then alternating with low intensity 50-55% of maximum heart rate for 2 minutes). Rhinitis symptoms, nasal blood flow, peak nasal inspiratory flow, pulmonary functions, respiratory muscle strength, and fractional exhaled nitric oxide were measured before and immediately, 15 minutes, 30 minutes, 45 minutes, and 60 minutes after exercise for each exercise program.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
12
The participants received a high-intensity interval exercise program of walking or running on a treadmill for approximately 40 minutes. The training included a 10-minute warm-up at low intensity. High-intensity interval exercise at a ratio of 1:1 (high intensity for 1 minute at 85-90% of maximum heart rate, then alternating with low intensity 50-55% of maximum heart rate for 1 minute).
The participants received a high-intensity interval exercise program of walking or running on a treadmill for approximately 40 minutes. The training included a 10-minute warm-up at low intensity. High-intensity interval exercise at a ratio of 1:2 (high intensity for 1 minute at 85-90% of maximum heart rate, then alternate with low intensity 50-55% of maximum heart rate for 2 minutes).
Faculty of Sports Science, Chulalongkorn University
Pathum Wan, Bangkok, Thailand
Rhinitis symptom scores change
Nasal symptoms were assessed using Total Nasal Symptom Score (TNSS) questionnaire. The subjects were asked to score symptoms of persistent allergic rhinitis before and after yoga training protocol. The total nasal symptom scores were computed as the sum of four individual nasal symptom scores; nasal congestion, itching, sneezing, and rhinorrhea. The scores ranged from 0 to 3 scale (0=none, 1=mild, 2=moderate, 3= severe)
Time frame: Change after each exercise immediately, 15 minutes, 30 minutes, 45 minutes, and 60 minutes
Peak nasal inspiratory flow change
The subjects placed a mask, which is turned onto a plastic cylinder through which the air passes during inspiration, over the nose and mouth and inspired forcefully through the nose, with lips tightly closed. Inside the cylinder, there is a diaphragm that moves to the airflow, and the maximum peak flow is registered in a scale range from 30-370 L/min. During the procedure, the subjects placed a mask over the nose and mouth and inspired forcefully through the nose, with lips tightly closed.
Time frame: Change after each exercise immediately, 15 minutes, 30 minutes, 45 minutes, and 60 minutes
Nasal blood flow change
Laser Doppler flowmetry (DRT4 moor instrument, UK.) was used to measure of the nasal blood flow (NBF). Before the test each subject rested for one hour in a separate room. During the test, they were instructed to breathe normally breathe and not to speak, cough, or move. A lateral endoscopic probe with a flexible nylon sheath 1.34-mm-diameter flexible nylon sheath was placed to the front of the nose. Nasal blood flow measurements were performed before immediately, 15 minutes, 30 minutes, 45 minutes, and 60 minutes after exercise for each exercise program.
Time frame: Change after each exercise immediately, 15 minutes, 30 minutes, 45 minutes, and 60 minutes
Pulmonary functions change
The participants were asked to wear a nose clip while sitting on a chair, and the researcher gave the participants the step-by-step protocol to prevent an incorrect maneuver. For the FVC maneuver, three cycles of slow normal breathing were performed before demonstrating forced inspiration and expiration.
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Time frame: Change after each exercise immediately, 15 minutes, 30 minutes, 45 minutes, and 60 minutes
Respiratory muscle strength change
Respiratory muscle strength was assessed by measuring Maximal Inspiratory Pressure (MIP) and Maximal Expiratory Pressure (MEP) in cmH2O. The participants were in a sitting position using a portable handheld mouth pressure meter (i.e., MicroRPM) with a nose clip. For the MIP measurement, the participants were asked to exhale until they felt no air remaining in their lungs (starting with the functional residual capacity \[FRC\] point), then held the device on their mouth and inhaled forcefully for 1-2 seconds. For the MEP measurement, the participants were asked to inhale until their lungs were completely filled with air (starting with the total lung capacity \[TLC\] point), then they kept the device on their mouth and exhaled forcefully for 1-2 seconds
Time frame: Change after each exercise immediately, 15 minutes, 30 minutes, 45 minutes, and 60 minutes
Fractional exhaled nitric oxide
Participants inhaled deeply for two to three seconds before exhaling slowly. Normally, it took 10 seconds to exhale.
Time frame: Change after each exercise immediately, 15 minutes, 30 minutes, 45 minutes, and 60 minutes