Immediate Spirometric Response to Submaximal Exercise in Healthy Young Adult Males

Area of Science:

• Exercise Physiology
• Respiratory Medicine
• Pulmonary Function Testing

Background:

• The immediate impact of submaximal exercise on respiratory mechanics is not consistently reported across studies.
• Variability exists in spirometric responses following a single exercise session.

Purpose of the Study:

• To investigate the acute effects of a single submaximal exercise bout on spirometric parameters.
• To analyze immediate changes in lung function in healthy young adult males.

Main Methods:

• Prospective pre-post interventional study involving 200 healthy males (18-30 years).
• Exclusion criteria included smoking, respiratory/cardiovascular diseases, asthma, and allergies.
• Spirometry (FVC, FEV1, PEFR, FEV1/FVC) was performed before and immediately after the Harvard Step Test.

Main Results:

• Forced vital capacity (FVC) significantly decreased (p=0.001).
• Forced expiratory volume in one second (FEV1) and peak expiratory flow rate (PEFR) significantly increased (p=0.020 and p<0.001, respectively).
• The FEV1/FVC ratio showed no significant change (p=0.337).

Conclusions:

• Submaximal exercise induces significant immediate changes in lung function parameters in healthy young males.
• Expiratory flow rates (FEV1, PEFR) improve post-exercise, while FVC declines.
• The FEV1/FVC ratio remains stable, indicating preserved airflow limitation characteristics.