80mg to 100mg seems to be the top end of testosterone per week without side effects. That being said you lose the other benefits of testosterone at that dosage such as a sense of well being, energy and desire and rock hard erections every day. My point in this is that its give or take but if anyone is thinking testosterone as a performance enhancer in running is silly.
I'm currently taking 200mg every 2 weeks. I done an initial 10 weeks of injections and was tested and given 4 more weeks to stay at this level. I have not seen any benefits to my running and have put on unwanted weight. When I go back for more blood work I am going to request a smaller dose as the weight bothers me.