Ooh yeah, Jogging is something different alright! I thought the same, because I'm good on the bike, cross trainer and rower, I thought I'd have no issues with jogging! But it really is a shock to the system!! I actually started running in my Kickboxercise class where we do a circuit type thing including running laps of the room. That helped to improve my fitness sooo much! The first time I tried to jog on the treadmill I managed 20 mins at 8.5km! I was so proud
I had the WORST first experience with jogging though. During my fitness course I mentioned to a lady who I was doing the course with that I was curious about jogging. At this point I didn't do ANY cardio at the gym, just weights, cos I was at a really crappy gym. Anyway, this lady was like "Oh, I'll take you out!!! I love to jog". Anyway, she made me jog on the footpath around the block for 10 minutes without stopping. I was DYING, could not catch my breath and was spluttering and trying desperately to slow down and she kept yelling "NO!!!!" and dragging me along by my arm.
It was HORRIBLE!!! That put me off for months!!!
The best thing to do is to just DO IT YOUR WAY!!! If you can only jog for 30 seconds before you need to walk to calm your breathing down for a minute, do it that way!! Just try to jog again as soon as you catch your breath.