Agreed never DOMS from the bike, just fatigue. The gym will put me in a world of hurt for days with squats and lunges. Last week, I was toast for 3 days after 3 x 20 lunges and squats. Granted it was my first gym session in a month for my legs. My immune system literally ramps up to where I feel sick for day 2 and 3 when my legs get that sore. If I want to be intense on the bike in a training block leading up to a race, my body can not handle any proper lifting without having to skip some bike training.