Link to LS saves How to use Put one of those into GTA San Andreas User Files which is in your Documents directory. The number in the save file name is the slot, change it to your liking. For "casual" runs, just use the 45 percent muscle, else read further.

Save Details They have 100% cycling skill, 100% stamina, infinite sprint, 2.5% fat, 45% or 100% muscle, depending on the save.

How fat/muscle affect speed: Running:

• fat and muscle do not make a difference until a threshhold is reached
• if you have 50% muscle, you run slower, with 0 to 49% muscle you run with "normal" speed
• maybe the game adds fat and muscle, I forgot (that would mean: 20% muscle + 30% fat = 50% -> running slower)

Cycling:

• every bit of fat slows you down
• every bit of muscle makes you faster (did not test insane muscle like 100%, though)
• cycling skill makes you faster

--> It is a tradeoff, someone test. ^^ I cannot because I had to use some old HDD with a cluttered OS to boot, everything is slooooow, including SA.