L arginine and l citrulline?

hi iv been taking mega men sport (the vitapack) and it comes with l arginine and l citrulline its serving sizing is only 500 mg of both. and iv looked only line and people say they take twice that. should just open another pack and take to of those pills intead of one cuzz to be honest i havent seen a lot of imrovement in my workout. one mor thing iv been getting pains in my leg muscle when i do ab workouts and shoulder pain when i do tricep workouts.is this beacuse of the pills in mega men sport or am i doing something wrong ? i.e. the pill in the vitapck are =multivitamins,burn 60,l arginine, l citrulline, and l glutamine. please answer i dont want to get injured in my workouts as i do kickboxing and my dream is to go pro