Ok, maybe I am the exception but I work in a company full of the exception. We’re a reasonably sized company for New Zealand being about 160 people, with roughly 90-100 of those in my office. We have 2 indoor football (soccer) teams , 2 touch rugby teams, a dragon boating team, many keen cyclists. I’d say that the rate of the overweght is less that 10% here, and it is much lower amongst the developers too.
I’m of the opinion that exercise should be fun, sure if you’re not into sports then get into that recumbent cycle and play your war-crack. I’m a firm believer that workmates that play together, in any way, will work together better. Heck we even have a group that play BF2 together!
I fell victim to the sedentary job + dropping metabolism due to age + good food trap and put on 30kg (~66lb) in an old job. I’ve since shed over 2/3 of that simply by playing sports again! I’ve not modified my diet as yet, but will be doing so to help shift the last of the excess.