# How do you calculate expiratory reserve volume?

Expiratory Reserve Volume Explained A different form of this, which emphasizes the residual volume formula, is RV = TLC − IRV − TV − ERV. Likewise, the expiratory reserve volume is given by: ERV = TLC − IRV − RV − TV. Your ERV will be higher when you are standing than when you are sitting.

Also, how do you calculate reserve volume?

It is calculated by summing tidal volume, inspiratory reserve volume, and expiratory reserve volume. VC = TV+IRV+ERV. It is the amount of air remaining in the lungs at the end of a normal exhalation. It is calculated by adding together residual and expiratory reserve volumes.

Subsequently, question is, what happens to expiratory reserve volume with exercise? The amount of air you breathe in is your tidal volume. You can tap into this reserve volume when you exercise and your tidal volume increases. To sum up: Your expiratory reserve volume is the amount of extra air — above anormal breath — exhaled during a forceful breath out.

Considering this, what is expiratory reserve volume?

Medical Definition of expiratory reserve volume : the additional amount of air that can be expired from the lungs by determined effort after normal expiration — compare inspiratory reserve volume.

What is the expiratory capacity?

Expiratory Capacity (EC) Total volume of air a person can expire aftera normal inspiration. This includes tidal volume and expiratory reservevolume (TV+ERV).