I have mixed feelings about the daily long walk he needed though, which was an added commitment to an already full day. However, it had to be done so I did it - and got fit in the process.
Writing a novel is like having to walk the dog. It should be done every day, for at least an hour, more if possible. Some days, the dog has to make do with a quick scoot round the block, but you try to make it up with an extra long walk the following day.
Novels don't have the same big brown eyed appeal that a dog has so it's easier to ignore them, but unless you do a bit every day - and the bit might only last 10 minutes - you lose touch with the work.
Walk every day, and become fit. Write every day, and get a novel written.