I can think of no better place to post this than in a forum aimed at bike mechanics.

I've read that trainers can be hard on bikes and that we should use older "backup" bikes on trainers instead of our high-end super light road bikes. I've also read that this isn't the case at all and you can pedal away on your Colnago C50 hooked up to trainer during the winter months without fears of any damage.

What's the real story?

Thanks