omandren/deca cycle leaving me winded

[Rockin Z28]

i just started my 3rd week of 500mg omna 250gm deca and i will say the strength gains are enormous, but so is the weight gain lol..i went from 225
(pre cycle) to a staggering 242 today..im trying to icnrease my cardio with low intensity sessions after workouts but they seem to be full of fail, before the cycle even at 18% bodyfatable to do 45 mintues without a second thought 4-5 times a week while lifting, now im lucky to do 20 after an intnse workout at a very conservative pace..im trying to avoid the aromatization effects through nolvadex and eatign clean and drinking plenty of water (1 gallon a day and a low carb (50-60grams) very high protein diet), has anyone else experienced a feeling of very winded on a cycle like this? i realize the slight insomnia and increased metabolism are one of the effects i just didnt expect it to be so pronounced..i realize at 18% i was a little fat to be cycling but i was down from 31 and was eating good

[10nispro]

How is your blood pressure? Sounds like you are holding lots of water weight. Notice any lower edema? swelling in your legs?

You may be hitting the wall after your workouts? No gas in the tank. Also, gaining 17lbs in 3 weeks may be taxing your cardiovascular system.