The biggest mistake I've made was to pack on 25-30 pounds within a year of my diagnosis. Mayo scared me into doing it and I did it all wrong. I was always very muscular but lean. I weighed about 120 when I was diagnosed. Now I weigh 145 and feel that all of it is belly fat. I still have core strength enough to do situps (I don't but I could if I tried.)
My GP and I both believe a high fat diet with plenty of protein, lots of fresh, organic fruit and veggies is the way to go. I know when I cut out all the sugar (except for fruit) and got rid of the grains, I felt lots better and had more energy. When I fell off the wagon and ate some sugar a few days in a row, I felt tired and depressed. I believe processed foods are bad for everyone, not just PALS.
My BMI is 23. The reason it is low is because I'm VERY small boned and BMI's don't take into consideration bone weight/size. My waist went from 26 to 31 and I felt like all the fat went to my middle.
The Keto diet is neuroprotective but you will probably lose weight and some of that weight will be muscle.
After reading tons of studies, articles, opinions, and studying human nutrition at the graduate level, I decided to cut out all processed food, all grain (except my morning fiber), and I'm reducing dairy (I only eat organic Greek yogurt.)
I honestly believe rapidly gaining all that weight contributed to my spraining my ankle.
I'm going to lose 5 pounds VERY SLOWLY. I'm also walking on the treadmill for 1/2 mile a day to see if I can build some of my leg muscles up again. My good leg atrophied after sitting on my butt for 6 months with the sprained ankle.
I also think too much fat around the middle makes it harder to breathe.