Originally Posted by Master-Classter
I used to do the cardio before and was completely drained of energy by the time it came to a workout. I didn't stop lifting because my muscles were sore, I stopped doing reps because I just ran out of general energy. so my 2cents is to do it after or on a recovery day instead.
Sounds like you were doing too much
I used to bike to the gym when I lived like a mile away from it, and that 10 minute or w/e ride warmed me up enough that I could jump into the weights. I think 10-15 mins beforehand is the max... and that should just be to warm up. I cycle a bit now, big ride is about an hour and a half, and that is on a completely separate day from any lift days.