A couple of years ago I was exercising a lot and in pretty good condition for a man of my advanced years. For a number of reasons I stopped going to the gym and ended up overweight and unfit. This year I'm trying to get back into shape and thought I might add some technology to my sessions because there's nothing like a new gadget to get you motivated, am I right?

I walk and cycle a lot - most fitness trackers can handle that (even Google Fit on my phone handles that) - but I also go to the gym six days a week, where I alternate between cardio (rowing machine, stationary bike and treadmill) and light weight sessions. Does anyone know of a tracker that does a good job with those gym activities? I mean, tracking distance/time/speed is easy when GPS is plotting you all over town, but what can they measure (apart from heart rate) when the bike is not moving? Can they even tell the difference between, say, rowing and cycling?

I'd be interested in any insights/experiences people have had. Thanks...