Yesterday I took my first bicycle ride for a genuine errand, rather than just practicing how to stop and start and not fall off. I went to the village and back for a bottle of wine, about a 4 mile round trip.
All was going well until I tried to cycle over a railway bridge. I made it over the bridge (barely) but it took everything I had, and afterwards I had jelly legs. I had to get off and push for the last mile, but even then my legs kept giving out on me.
I'm familiar with this phenomenon from when I used to do distance running. Your legs don't hurt, they just won't hold you up. It happens when you push too hard. I used to get it doing speed work (when you sprint for a while, then jog for a while, then sprint, then jog etc.) So I understood why the railway bridge had done for me. When I got back home I sat down, ate a banana and drank some water and I was right as rain in a few minutes, so don't worry. I didn't do any damage, I just tried to do something my legs aren't strong enough for yet.
More practice required, I think. I'm determined to get the family cycling to school next September. I've just won an auction for a pink girls' bike on eBay for Eleanor, so now we all have bikes. The summer holiday has just begun so daily cycling trips are in order - avoiding bridges.