As somebody touching 20st (127kg) I recently started working on a client site and had a choice, drive by car or catch a train and cycle the 5 miles to the client site. Into my second week and finding the cycling is really making a difference and can get desk to platform in 31 minutes (unlocking of bike etc) down from 35 minutes at the beginning. I'll weigh myself at some point but honestly feel I'm physically getting…
After I started restricting calories nearly a year ago I also started driving around 30 min every single on the ergometer bike (always the same amount of kilojoules per day to be consistent, first 1,000 and now 1,350, first at 120 Watt and with breaks, now at 210 Watt and with no breaks). I also started taking long walks every day, around 6km. (I know people have strong opinion about what is right and more correct to do and I know that my exercise plan is weird and unbalanced, but the most important thing to me is to have something that works and that I can easily get into the habit of doing. Habits are fucking powerful and wondrous things if you make them work for you, devilish, evil things if they work against you. For now I have something that works and that I’m very comfortable with. I can always make improvements, sure, and I want to. Just slowly and with consideration.)
To my astonishment my vitals started improving almost immediately, before I had lost any significant amount of weight. My pulse was down to around 60 (resting) or lower only a couple of weeks after I started, when I was still very much extremely obese. I’m a coward when it comes to measuring blood pressure, so I have no data on that, but I do know that it’s either optimal or normal right now that I’m merely very slightly overweight (94 kg). All the discomfort went away almost immediately, also before I had lost any appreciable amount of weight.
My dad also always has been struggling with his weight, but doctors have told him repeatedly that health wise he's actually doing relatively well, presumably because he also has a similar and very consistent exercise regiment (that also includes daily cycling).
The nice thing with exercise was that I felt its effects on my health more or less immediately. Weight loss is much, much harder to notice and a much more longer term process.