the group with high-intensity interval training at a ratio of 1:2 (HIIT) 3 days per week, over a total period of 12 weeks.

the group with moderate continuous training, 3 days per week, over a total period of 12 weeks.

The participants performed HIIT programs for 12 weeks involving walking/running on a treadmill preceded by a 10-min warm-up at low intensity and exercise with high intensity for 1 min at 85%-90% of the maximum heart rate alternating with low intensity at 50%-55% of the maximum heart rate for 2 min, for 24 minutes, and 10-min cool down.

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)

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.

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.

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.

Nasal secretions collection was performed bilaterally with filter paper strips (7x30 mm Whatman No.42, Whatman, Clifton, NJ). Three filter paper strips were sequentially placed on each anterior portion of the inferior turbinate for 10 min. This filter paper strips were collected into appropriate tubes and centrifuged at 3,000 rpm for 5 min at 4 °C and immediately frozen at -70 °C until later analysis.The levels of cytokines were determined by using Sandwich ELISA technique