I am 70 years old and take blood thinners for AFib. Starting with archery to share with my granddaughter. I get impressive bruising on my bow arm from just below the elbow to about halfway down to the wrist. I was using the ranges heavy nylon fabric arm guard. Do I just get a more heavy duty arm guard and carry on? It doesn't seem like it would be conducive to accuracy to have the string slapping me on the arm every time. But I am asking you.