Let's see... I'mma try and answer that...
Multiple sets to failure and heavy negatives are certainly geared to producing the most muscle TEAR.
Contractile protein synthesis is a job done by, and only by, the myonucleus. The more myonucleii, the more you can tear down your fibers and still get them repaired prior to your next workout. Of course, testosterone increases the activity level of the myonucleii, which repairs the fibers more.
If you've done multiple androgen cycles, you've noticed that eventually it becomes harder and harder to make and keep the gains. That is because use of androgens stimulates the myonucleii, but doesn't INCREASE THEIR NUMBERS.
Well, that process happens naturally, but there is no way that natural myonuclear number increases can keep up with the demands put on them when you suddenly stop your cycle. Hence, loss of strength and mass.
Heavy negatives and such, which tear down the contractile tissue more, do increase the need for myonuclear number increases. Such increases are done through the merging of the satellite cell into the muscle cell proper. Note that myonuclear number is the main determinant of muscle fiber SIZE and also of its ability to repair itself. Of course, for a gear user, there is imbalance between the amount of contractile tissue and the myonuclear number.
IGF-1 outside the muscle cell increases the multiplication of satellite cells. IGF-1 inside the muscle cell increases the merging of those cells into the myocyte proper. Both effects are required for continued muscle hypertrophy.
If I used IGF-1, which I probably will, it will be about 4 times a year, with a heavy training without excessive negatives and such. That will promote proper balance between ability to regenerate the tissue and muscle tear/regeneration and the accompanying strength increases.
Err... Am I making some kind of sense?
Man, my avatar is hot. That's why I post so much.
