The original Buddhist monastic precepts required that food be restricted to one meal a day before noon. It's a good way to live, but I've only ever kept it up for a couple of months at any one time. It's socially restrictive.
here in california, we often expend more energy in our daily routines, rest less, and use up more mental energy doing all our problem solving and anxieties and such, than would be the case if we were practicing mindfulness most of the day, instead of feeding into our concerns (attachments) to the various things we do. during mindfulness and zazen, the mind goes into a different mode, which is in many ways, rejuvenating in itself, but this is not the case with how we - or at least i - approach problems at work.
comprehending why a practice is done, and then being true to your comprehensions is where it is at, and it is not in mimicking the implementations/practices of others.