I'm no expert and I'm sure you'll get better imput from the hammerheads/tri gals on here, but when I change positions from say the drops to a more upright posture, I get more power from the change and angle of my body. Your chest opens up increasing your oxygen intake and less pressure on your diaphram. When my husband got fitted for his P2C, we were told the whole idea of the tri-bike is to use a different part of your leg, more hamstring in order to save your legs for the run. You can also use Chrissy Wellington's training suggestion. She's a power rider, get into a bigger gear and hammer. She rides in an average of 65-75 cadence rather than an 85-95 training cadence. Thats all I have to give.