Yep. I've done it, so have thousands over others using my program. But the best way to prove it is to try it yourself.
There are plenty of free Isometrics on my site - and a complete free guide with loads of exercises and workouts here - https://samuraistrengthtraining.com/starting-isometrics-the-ultimate-guide/
Download that, for free. Commit to training for 7 weeks doing the workouts in that. Do the work, make the commitment, get the results. ;-) Then if you want even better results, you can pick u my Perfect Body course.
On page 262 of the 7 seconds to a Perfect Body book, you state that eating quicker can give you 2 days worth of calories. I wanted to know if you meant