Rapid Acting Testosterones
Topical Testosterone gel (like AndroGel, Fortesta, Testim) is prescribed by medical doctors. Usually used once a daily. 1.62% Testosterone per. Common application is 5gr. But for performance enhancing purposes, usually 20gr is needed to start to see increase in performance.
Testosterone Suspension is perhaps the oldest anabolic steroid preparation, first isolated and synthesized in the early 1930s by German scientists. It is the very first preparation of Testosterone to ever be created for use, and pre-dates the slower acting esterified variants of Testosterone by a matter of several years.
Athlethes that uses Testosterone Suspension reported rapid muscle growth and water retention. Increased aggression was also reported with use of testosterone suspension. Users found that Testosterone Suspension provided the best results when it was run for at least 8 weeks. More experienced users found they had better results when extending their cycle slightly longer. Also endurance and strength increases were reported while following an intense training routine[1-2].
As with all of the Testosterones, the most common report by subjects using testosterone suspension was immense gains in strength. Change in size, shape, and appearance of the muscle were also reported. There was roughly a 15% gain in Lean Body Mass from 20 weeks of 600 mg/week of Testosterone therapy. 
 Effect of androgen on erythropoietin in patients with hypogonadism
 Androgen receptor in human skeletal muscle and cultured muscle satellite cells: up-regulation by androgen treatment
 Testosterone dose-response relationships in healthy young men