Hanel and Secher (1991) Maximal oxygen uptake and work capacity after inspiratory muscle training: a controlled study

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Maximal oxygen uptake and work capacity after inspiratory muscle training: a controlled study

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CONTRIBUTORS:

	Author:	Hanel, B.
	Author:	Secher, N. H.

JOURNAL:

Journal of Sports Sciences (JSS), 9(1), ?? - ??.

YEAR:

1991

PUB TYPE:

Journal Article

SUBJECT(S):

MUSCLE; EXERCISE; TRAINING; AEROBIC-CAPACITY; ADAPTATION; RESPIRATION; COOPER'S-12-MINUTE-RUN-TEST

DISCIPLINE:

No discipline assigned

HTTP:

LANGUAGE:

English

PUB ID:

103-366-306 (Last edited on 2002/02/27 18:45:01 US/Mountain)

SPONSOR(S):

ABSTRACT:
The effect of inspiratory muscle training 10 min twice a day for 27.5 days were evaluated in 20 human subjects, of whom 10 formed a training group and 10 a sham training group. The maximal oxygen uptake (VO2max), maximal ventilation, breathing frequency during maximal exercise and the distance run in 12 min on a track were determined in addition to resting peak expiratory flow, forced vital capacity (FVC) and forced expiratory volume in 1 s (FEV1), with alveolar oxygen tension (pAO2) during maximal exercise being calculated. Inspiratory muscle training increased maximal inspiratory pressure from 93 (range 38-118) to 10 (65-165) mmHg in the training group, but did not affect VO2max, ventilation during maximal exercise, peak expiratory flow, FEV1 or FVC. However, breathing frequency during maximal exercise decreased slightly from 56 (44-87) to 53 (38-84) breaths min-1 in the training group only; but the calculated pAO2 did not increase from the pre-training value of 126 (116-132 mmHg. The maximal distance run during 12 min increased similarly in the training and sham training groups by 8 percent (3-12 percent), respectively. The results of this study show that inspiratory muscle training resulting in a 32 percent (0-85 percent) increase in maximal inspiratory pressure does not change FEV1, FVC, peak expiratory flow, VO2max or work capacity.

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