Does Interval Hypoxic Training (IHT) Affect the Lung Function of Asthmatic Athletes?

This study demonstrates a statistically significant increase in FVC with IHT in both asthmatic and non-asthmatic participants. IHT was not associated with a significant bronchodilator effect, with no change in FEV1 (forced expiratory volume in 1 second) or PEF (peak expiratory flow). However some asthmatic participants have shown an improvement in symptoms and a reduction in medication use. The reduction in medication usage by half of the asthmatics who had attended follow up is consistent with findings of other research. Redzhebova (1992) found, in a study of asthmatics, after 20-25 sessions of IHT that 33.8% of the participants decreased dosages of medication, 60% commented that attacks became less frequent and symptoms improved. Comments by asthmatics in this study included “less shortness of breath, not having such a tight chest, not as wheezy”. Other studies have also commented on attacks becoming less frequent and mild, periods of remission becoming longer, drug treatment reduced and children showing an improvement in mood

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