Ooh sneaky Quak, you pulled out the "brisk walking" card. That kind of trumps everything doesn't it . Brisk walking is the Mary Poppins of exercise, "practically perfect in every way"
I guess everyone's body is different and reacts differently to calories and exercise. I know that I feel more bouncey at the beginning of a run when I have had carbs[ ie xmas] and have a store of glycogen in my muscles. I also know that after the first 10 minutes I then feel about the same as when I am in ketosis on low carbs and calories. So it is different for sure. Lifting my fat old body off the ground when I run is resistance training a plenty and I have been amazed to feel my thighs are not actually made of marshmallow as I have always thought but there is muscle in there and it is are pretty firm now, well when I tense them up anyway. I have Jillian Michaels 30 day shred DVD.It is only 20 minutes and I really recommend it. It is a good short intense all round workout to keep your body guessing, you need some hand weights though, good for preventing flabbiness post weight loss.
The most important thing for me in this debate[ and I am sure you agree] is that we don't feed the idea you shouldn't do any exercise on a VLCD as that is the sort of thing my inner car junkie food addict likes to hear and uses to sabotage my weight loss and health goals. This discussion started with a new to the diet person asking the question about exercise so I was just keen to promote the idea that yes , listen to your body, but get moving, and if you have been a gold medal couch potato like me, that probably means moving a bit out of your comfort zone in order to push yourself into new healthy habits and then really feeling the benefit of exercise...... So you had a good time at xmas, jumped straight back on the diet afterwards and lost a mighty 4lbs.... you're not Mary Poppins are you?????