Does anyone else use a heavy cheap fixed gear for strength training? I like my geared bikes, but I keep a westport cruiser from walmart, specifically for building leg strength, it's a heavy fixed gear, and it seems to really give me a workout going up and down the small but steep hills around here, I figure it's cheap, and I already owned it, why not use the weight to my advantage? It wouldnt hold up for every day use, and the dam tires are already rotting, but at least it's being used for something