[paulpauper]

It is even worse than that. The conversion rate of activity to net calorie loss is not 1 to 1 . It can be zero or even negative, at least based on my own experience and other people. You see people on Reddit subs do 10k steps and tons of walking, hardly lose any weight. It's all about not overeating.

[nradov]

Walking is great for many reasons, but 10K steps isn't much. It would be silly to expect much weight loss from that. And most people significantly understand their caloric intake.

[tonyedgecombe]

One of the problems is people naturally adjust their activity levels after exercise. After a two hour bike ride they will spend the evening on the sofa. It seems we naturally adjust without consciously thinking about it.