We just got a peloton at the end of October - we've had a tread+ for a long time (wife runs marathons) but I'm not interested in that. I had my bike on a stand in my office and was spending half an hour on it a few times a week (and usually on other nights taking a 2.5 mile walk with 40 pounds in a backpack). Wife decided we should get a peloton bike which was fine with me and holy shit I did not realize how easy the bike on the stand was in comparison to the Peloton. Anyways, I'm still fairly early in the peloton game but 3000 miles is like 8.2 miles a day, I'm doing more like 6-7 in a twenty minute class which I'm not doing every day. I could probably up the time and I bet I'll get better on the distance but that number is probably higher than what I'll aim for on the bike. Especially since I do also like walking around with the weighted backpack and won't hit it every night anyways.
I am not a learned man when it comes to most of the exercise stuff, but to the extent that I do planks it's something I hit for a few minutes to try and work my abs, not something I'm doing to try and burn calories or work up a sweat. I figure if you're exerting yourself lifting or doing pushups or whatever else to target muscles, that's going to get your heart rate up a bit, but I assumed that isn't the point of that kind of exercise? For me, I feel like if I'm on the bike that's good cardio and working on my vo2 max or whatever, rucking around is a mix of moderate cardio and moderate core strength, and doing planks is something I've tried to work a bit in just to try and build some muscle under the skin that used to hold more fat. I was doing some other stuff - situps, leg lifts, etc but I kept tweaking shit or just rubbing my back raw. I'm sure there's a lot of user error in there. I do feel like pushups would do that thing while also working other muscles and that will probably be one of my number targets next year.
I weigh myself every day, but I really like the Happy Scale app because it gives you a smoothed average. If I eat a junky meal for dinner (especially lots of salt), my weight will pop up the next morning but it's obviously inflammation, and the line doesn't creep up much.