Butterfly and Kidney Breathing

From the Shaolin "form" - Butterfly,
Repeated the first move 40 times and started feeling breathing from kidneys.
This was Felt on Sunday May 11, 2008. Mother's Day.

Inhaled at the rest, and exhaled at the movements.

Does a "hard on" in the morning reduce my energy level ?
Felt very weak when I got up from bed, compared to yesterday.
Did not felt like doing morning exercise.

I need to get up earlier.

Felt much stronger after the 120 reps of modified cloud hands, on each arm.
Note: Cloud hands as taught by Alex Dong (Tung) is a pull and elbowing the opponent.
My intention is a palm strike. or a back palm strike.
Much more like a bird or butterfly spreads one wing .

Still have pain in my right knee.