It helps them warm up the muscles especially ancestral-grow for runners and bicycle riders who train in the morning. Studies that have been prudent and fair show results between 25% - 40% increase in the size of the penis as well as increasing the girth. Again this is directly ancestral grow related to blood flow, male extra allows the blood to flow to your penis more easily providing for better erections. The second of the male enhancement exercises that you should know about is the masturbation technique. The additional benefit of increasing blood flow to the penis is to cause erections that are harder and longer lasting.