Another benefit of testosterone is that it has been shown to increase the number of red blood cells in the body, which increases oxygen flow through the body, aiding endurance in athletes. (testofuel.com)
This yoga pose opens up chest muscle and improves oxygen flow to the entire body. (rishikulyogshala.org)
When you work out, you're increasing the amount of oxygen flowing into your brain while releasing various other chemicals that help improve your memory and concentration. (inc.com)