Question

How would volume measurements change (pulmonary volume and capacity) if data were collected during vigorous exercise (TV, IRV, ERV, VC, RV) in comparison to collecting data at when at rest? Please provide reasonable quantitative estimates, rather than just a qualitative description.

Answer 1

Lung volumes and capacities during rest and during vigorous exercise

   During exercise, muscles work harder, and the body uses more oxygen and produces more carbon dioxide. To cope with this extra demand, breathing has to increase from about 12 litres of air100 litres of air during exercise. Lung volume increases by as much as 15 per cent during exercise. To meet the metabolic demands of your body during vigorous exercise.

TV: At rest, the tidal volume is about 600 millilitres in males and 500 millilitres in females.

IRV: the inspiratory reserve volume is the maximum amount of air that can be inhaled over and above the tidal volume The average value is 3000 mL

ERV,: the expiratory reserve volume. the maximum amount of air that can be actively expired by end of tidal volume and through the activity of expiratory muscles and the average value is 1000 mLto1.200 ml

VC,: The maximum volume of air that can be moved out during a single breath following a maximal inspiration. The subject first inspires maximally and then expires maximally

VC=IRV + TV + ERV and is valuable in determining the functional capacity of the lung which is approximately 4500 mL

RV: Residual volume, The minimum volume of air that remains in the lung even after a maximum exhalation and the person is not able to exhale this air which is 1 to 1.2 litres.

Lung volume/capacity	At rest	During exercise
TV	500-600milli litre	575-690milli litre
IRV	3000millilittre	3500millilittre.
ERV	1000-1200millilitr.	1150-1380milliltr
RV	1000-1200millilitr.	1150-1380milliltr
VC	4800millilittr	5000 Milli littre.