Increasing Nitric Oxide increased satellite cell activity - Center for Exercise Science in Gainesville, Florida (L-arginine and nitric oxide precursers effectively increased satellite cell activity - "rescued satellite cell activation in older mice."
Hawke, TJ. and D.J. Garry. Myogenic satellite cells: physilogy to molecular biology. Journal of Applied Physiology, 91:534-551,2001.
Greco EA, Pili M, Bruzziches R, Corona G, Spera G, Aversa A. Testosterone: Estrodial ratio changes associated with long-term tadalifil administration: A pilot study. J Sex Med, 2006;3:716-22.
There are MANY more - if initerested in pursuing, this will get you started or simply do a search - more out there than you will care to read. In fact, your time is better spent actually building some muscle than in searching and reading all this shit.
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