The Effect Of Respiratory Resistance Training On Pulmonary Function And Ventilation Threshold On Beijing Sports University Male College Students

Objective:To examine whether eight weeks of inspiratory muscle training(IMT) have influences of the lung function or ventilation threshold(VT) in Beijing Sport University male students.Methods:24 normal college students without the system training and 18 swimmers (national athlete level 5 people, accounting for 28%, the level of national level athletes 13 people, accounting for 72%) were randomly divide to intervention group and control group(ordinary intervention group, n=13, ordinary control group, n=11;athletes intervention group, n=10, athletes control group, n=8). All participants for eight weeks used breathing training apparatus for inspiratory muscle resistance training. Intervention groups have 30 breaths twice daily at 50%of maximal inspiratory pressure (MIP), intermittent 3 minutes between times. Control groups have 60 breaths once daily at 15%of MIP. Intervention group and control group were training every Monday, Wednesday and Friday. Every two weeks taked the MIP test to real-tine adjust the subjects’training load. Pre-and post-training measurements of MIP, pulmonary function, and VT were taken.Results:After eight weeks inspiratory muscle training, mean MIP increased significantly in both ordinary groups (P<0.01, nomal intervention group:16.7%and control group:9.2%). Athletes intervention group was a significant increased(P<0.01,17.4%). In pulmonary function test, athletes intervention group’maximal voluntary ventilation(MVV) had significant growth(Pre vs Post:134.7+17.1 vs 155.0+20.2, P<0.05).In ventilation threshold test, mean VT was very significant growth in ordinary intervention group(Pre vs Post:41.9+6.5 Vs 45.5+5.5, P<0.01), and Rating of Perceived Breathlessness (RPB) was also dropped significantly compared with nomal control group after the training(P<0.05,5.6+1.6 vs 6.7+1.3). VT and RPB of athletes intervention group had no significant change before and after the training.Conclusions:Eight weeks of inspiratory muscle resistance training can significantly improve MIP of the ordinary students and swimming athletes, and MIP had the largest growth in the first two weeks and in the first four weeks. Swimming athletes’MVV and ordinary students’VT was significantly inproved.Due to the inspiratory muscle resistance training in inspiratory muscle strength increase, the inspiratory muscle fatigue and rating of perceived breathlessness reduced in the increasing load test.