It can be, if it becomes a pattern. I’m speaking for myself and it’s a temptation I actively resist.
Exercise not that helpful for weight loss because
kib
(karen)
#22
True, but I was thinking little ones - true mistakes, not “accidents” like having cake for dessert. Like, I’m halfway through my salad and realize that the reason it’s so tasty is that it has 25 cherry tomatoes in it. Or I’m making my husband pasta for dinner and at some point it occurs to me that tasting it five time to see if it’s done is not a good idea. Or I have a snack of vinegar peanuts and fail to notice they’ve got 15 carbs of added sugar. Happens less and less, but if ten minutes of jogging around the kitchen could keep me in ketosis or get me back there faster, I’d go for that. 
LeCheffre
(Banting & Yudkin & Atkins & Eadeses & Cordain & Taubes & Volek & Naiman & Bikman )
#23
I did some work around this idea the first time I did LC for large weight loss. I was able to take some fast carbs directly after hard workout to no negative effect. I forget the why, but once your muscle GLUT-4 receptors are on, you can replenish glycogen preferentially.
Maybe you get a pump look, but beyond that, I’m not sure of the value.
On the top line, Weight loss is inherently slowed by anything that preserves or promotes growth in lean body mass. I only use a scale number as a short hand for a weight goal that is based on composition. And I assure you, exercise is useful for composition goals.
Pete_A
(Pete A)
#24
I love this. My view is this is what a “healthy” body will do. Be overall more efficient, and ultimately stronger.
jshaf
(James H Shaffer)
#25
started keto back in early october, the first month was just getting used to the food, when I started walking the weight loss doubled, when I threw in fasting and omad the weight loss tripled. lost 28 lbs one month then 25 the next. can’t tell me exercise didn’t play key part. in my experience it is helpful and is a part of my three pronged approach!
4dml
#26
All exercise is not created equal. Strength training is more important than cardio when trying to maintain (or build) muscle while losing weight. Without exercise, on average, 25% of the weight loss will be muscle. Increased muscle mass increases metabolism.
Varady, in her Every Other Day Diet book, has conducted studies comparing exercising dieters vs non exercising dieters. Her results are unequivocal- the exercising dieters had substantially better results.
HIIT cardio is better than lower intensity cardio. Studies have shown that HIIT creates a hormonally favorable state for fat burning for several hours later.
Exercise doesn’t make sense from a CICO, perspective, but it supports the insulin hypothesis. Over the long term, exercise increases insulin sensitivity in the muscles, helping lower BG.
During extended fasting, my BG is usually in the 50s-60s and BK 4-5. If I exercise for too long, my BG will increase (liver generates the needed fuel via gluconeogenesis) and my pounds lost will be less than my average. This doesn’t bother me at all. I’d much rather have the benefits above and slower weight loss. BTW, HIIT doesn’t adversely effect my numbers.
Screenack
(less is more, more or less)
#27
One tweak to your otherwise excellent summary. What do you enjoy doing? I love to run. I can, and do, run for hours. Not for weight-control, but I love the experience, the me-time, seeing new areas, full immersion when traveling.
Keep it fun. Life is too short for more chores. 
4dml
#28
My “just for the fun of it” activities are bicycling and standup paddle boarding. I like being outside so much that I moved to a tropical island.
Determined
#32
Victoria, As far as the fasting goes, I was heavy into fasting and the pounds just dropped away. Then, at a point, I stopped losing!
Needless to say, I was really frustrated. So I started eating, small meals, and the weight started coming off again!
I still fast, but it’s only a day or two at a time. I’m still losing at a good rate. I don’t know if this would work for you, but it’s kept me from giving up.
I started Keto in April and I’ve lost 22.8 lbs.
jmbundy
(John)
#33
There was an interesting study a while back link to Time article that shows this.
The findings are remarkable: No matter how much P.E. they got during school hours, by the end of the day, the kids from the three schools had moved around about the same amount, at about the same intensity. The kids at the fancy private school underwent significantly more physical activity before 3 p.m. than the kids at the other two schools, but overall, when you look at entire days, they got no more activity. “Once they get home, if they are very active at school, they are probably staying still a bit more because they’ve already expended so much energy,” says Alissa Frémeaux, a biostatistician who was the primary analyst on the data. “The others are more likely to grab a bike and run around after school, or maybe join a sports club.”
Victoria_McCoy
(Victoria Mc Coy)
#34
Interesting result. Thanks for sharing. I’m in the IDM program, and I plan to discuss your shift with my coach at our next session. I think something must be off for me, and it’s more likely related to my crazy metabolic disregulation than the addition of exercise. Last stall I had my coach advised increasing my intake on eating days and it actually worked. Maybe I’m overdoing the 5 day fasts and not replenishing enough in the two feasting days. Thanks everyone for your thoughts on this.
PaulL
(You've tried everything else; why not try bacon?)
#35
Dr. Fung and Ms. Ramos, in the presentations of theirs that I’ve seen, advise against fasting for too long at a time or for too many days a week. Certainly Dr. Phinney would agree.
Alecmcq
(Alec)
#36
Do we understand how this process works? Why do our muscles become more insulin sensitive from exercise? I am not disputing the idea, I think it is right, but I don’t understand it!
4dml
#37
If by “we” you mean me, then nope. I don’t understand the mechanisms at all. But I don’t geek out over the science. Just tell me the hypothesis and I’ll test it for/on myself. To that end, I know when my BG is elevated it will drop 15-20 points per day if I fast. If I add exercise it can drop 30-40 points. That’s all I need to know.
If you’re more curious than me, here are a couple of abstracts to get you started: