Quote (TempoONE @ Mar 6 2012 12:05am)
Why is it better to go up in weights as you progress through your sets as opposed to going down in weights?
i.e. Starting off at 60% 1RM, then 70%, 85%, 85%, 90%?
as opposed to
Starting at 90% 1RM, then 85%, 85%, 70%, 60%?
Because this way you are burning out the muscles more thoroughly. For strength purposes, this is the best way to assure maximum strength gains.
However for size purposes, this is NOT ideal. The best way for pure size gains is to go up and back down. ie:
Set 1 - 60%
Set 2 - 75%
Set 3 - 90%
Set 4 - 60%
Set 5 - 40%
This style increases the amount of punishment dealt to the muscles in the form of microtears which will increase your size.
To build strength is the opposite in the respect that you must gradually work closer to the 1RM and stop once you achieve maximum weight per set. This works synergistically betwen the physical and psychological systems, enabling a form of "muscle memory." The term is used improperly, as there is no real memory to the muscles, however it's a memory to your body that the highest weight you did the last time was achievable and can be surpassed the next time, and so forth.