⇒ gym re-boot

i started gymmin again today. pretty bad in terms of fitness. the results follow:
2.5km in 23'45" about 150 KCals on treadmill
9.5km in 20' about 100 KCals on bike
benched, pressed, curled, etc.

not too bad, but i question my fitness. Why is it, that at my peak, I still feel out of breath after light exercise? It might be my iron-ratio in my blood...i'll look into it.

♥♣♦♠