when did that become difficult??

When I was in elementary school I was a member of the skipping team. Yep, nerd alert here, I was a skipper. I LOVED skipping. I was great at skipping. Skipping was EASY! Me and my teammates were on the Telethon of Stars once and we skipped on a float in a parade (whether it was the Santa Claus one or the St Patty's one, I can't remember. I DO remember that it was wet and cold!).We had skip-a-thons for the Heart & Stroke foundation where we'd skip for a loooong time and collect money. That skipping for a looooong time was never difficult. It was like breathing. I loved it.Skip ahead (ha) to age 35 and yesterday's Body Design class (the one I left early due to illness) and how difficult I found it to skip 100 times in a row. That's it! Just 100 times! We had to do 3 sets of that in the first rotation of exercises. When I left there were another 3 sets of 100. Whereas I only got in 300 skips, my friends did 600.My legs, thighs, knees and shins are killing me. At least they were yesterday. I'm sore today but it's not as bad a I thought it would be with my reaction. I could hardly breathe after 100 skips. I thought my heart would burst from my chest.I can't believe how something I find nearly impossible to do now was as easy as breathing 25 years ago. (Gah! I can't believe it's been 25 year since I was TEN! *weeps*)When we got to class and the instructor told us to get the jump ropes I was thrilled. I was thrilled to be skipping again, too, even though it was crazy hard. I don't really have anywhere to skip at home. I can't do it in the back yard and I have annoying neighbours on one side and I don't wan to be skipping out there and having them see me. Yes, I'm self-conscious. What of it?I'd rather skip than jog, but if I am being honest with myself, I sort of want to do both.