@Rocio- Thanks for your comment! And thanks for reading my books – I really appreciate it. A number of people have tried Toggl as a first shot at time-tracking. It’s free for the basic version, and pretty simple. After you try it for a few days you can figure out if you need more bells and whistles and then go into the time-tracking market knowing what you need (which is better than starting blindly and trying to figure out if features like invoice creation or charts matter to you).

I read one of your articles in Verily a couple of weeks ago and loved it! I bought three of your books right after, I just read one and I am reading 168 hours…I am so excited and already being more conscious about the use of my time…I will email you with my progress! I would like to track my time for a week, I tried to download that one but I have an iphone, do you know any other app to track time that you would recommend? Thank you!

Hi Joanna, thank you for signing up, hope you find the app useful!
Re the smart watches, we are not connected to them yet, partly because we use Wi-Fi for our learning algorithms, and most watches don’t have that. But we do know that’s something we’ll have to tackle in the future.
I also had trouble keeping my phone with me all the time at the beginning, but I got used to it in the long run – mine is waterproof though, which helps in many situations!

I will be interested to see this study replicated on those who take a more modest route to weight loss. The measures (both in terms of eating and exercise) are so extreme that it does not seem surprising that the body would “rebel.”

@cathy- I think that’s the key part of it. It can be done, but it’s generally unsustainable with any sort of normal life. What did seem interesting is that bariatric surgery was not (as) associated with the same problems — figuring out why might be key to successful obesity treatment.