The effect of nasal breathing tolerance trainings on Oronasal Switching Point in healthy and non smoking man

Nasal breathing is the normal breathing route of most people during rest. During training, by increasing ventilation, nasal breathing switches to Oronasal so called OSP. Despite the researches that has done about determination of effective factors on OSP, the effect of nasal breathing tolerance trainings on OSP has not been studied and it is been taken into account in this research. Ten youth and healthy volunteers (5 men and 5 women) were involved in three protocols: (1) measuring the ventilation, working load and OSP during exercise, (2) entering to the training program of nasal breathing tolerant in condition of 40 minutes per a day, 3 times in week during 8 weeks and finally (3) performing the first protocol again. it was proven in presented research that the amount of working load and OSP in both genders after exercise training is significantly increased in regard to the non training period and in spite of no changes in amount of basic ventilation and during exercise after these trainings in comparison to before that time, ventilation slope has a significant reduction in regard to the time of switching. according to the outcomes of this research it can be announced that both working load and ventilation are important elements involved in OSP and they are able to increase OSP. Therefore it is possible to use this method on increasing training tolerance of asthmas during trainings or for athlete subjects in order to proper halituous infiltration.