Gym folks. Need help tracking

It's never all that accurate. If they are cardio machines, there are a couple like treadmill that will be kind of similar and I always edit what mfp guesses lower. If you mean resistance weight machines, then yeah, circuit training. I usually log an hour in the gym somewhere between 300 and 500 depending on how hard I pushed myself and how much of the time I was moving. I usually do ARCTrainer at a pretty stiff setting for half an hour and circuit train a half hour pretty much non stop and log ~450 between the two.