Dug up some articles you'll enjoy. This forum gets more attention then the educational section so I'll create quick links for you guys:

Intramuscular Testosterone Injections Increase Satellite Cell Activation

Important "Medical Mistakes" to Avoid During Your Next Cycle

***Androgens, Estrogens, and Libido: New Evidence***

Testosterone Accelerates Muscle Recuperation

Acute Increases In Anabolic Hormones Do Not Enhance Protein Synthesis

Growth Hormone Stimulates Collagen Synthesis, But Not Protein Synthesis