Keep your leg at a 90-degree angle and your knee and foot at the same height. Avoid rotating your spine at any point during the exercise. Pause at the top for two seconds before lowering your knee to the floor. Repeat 15-25 times before performing the exercises with the other leg.
Inhaled air is about 20-percent oxygen. Exhaled air is about 15-percent oxygen. Therefore, about 5-percent of breathed air is consumed in each breath. That air is converted to carbon dioxide. So, as far as how much air is actually used, human beings take in about 550 liters of pure oxygen per day. A person who is exercising uses a lot more oxygen than that.
1. Record the average breaths per minute for the Rbreather.n breaths/min x 0.5 liters of air = liters/min This value represents the amount of air consumed in one minute and is referred to as the respiratory minute volume. 2.ART I.--Calculations to determine how much air we breathe The average person inhales 500 ml, of air per breath. For simplicity, use 0.5 L. First, grab a partner and a calculator. Decide who will be the breather and who will be the recorder. The recorder will count the number of breaths each minute for five minutes.