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.
About 1200 mL in males and 1000 mL in females D. Pulmonary Capacities (Calculated) 1. Minute Respiratory Volume (MRV) [Respiratory Minute Volume (RMV)] a. The amount of air breathed in and out using normal breaths in one minute b. Tidal Volume x Breathing Rate i. 500 mL x 20 BPM = 10,000 mL/min 2. Inspiratory Capacity (IC) a. The maximum amount of air that can be taken in by the lungs b. Tidal Volume + Inspiratory Reserve Volume i.