Can you build muscle on a water fast?

When you do prolonged fasting, your body goes into ketosis and breaks down the fat for fuel. Depending on your fasting experience, ketosis usually kicks in between the 36h to 48h mark and when you hit that, your body starts producing HGH which is a highly anabolic hormone that many body builders inject themselves at ridiculous amounts. When you go into prolonged fasting, your body tries to preserve your muscles and burns your fat for fuel so its important not to eat anything because any rise in insulin from food will halt hgh secretion. You can build mass on prolonged fasting if it is scheduled and properly strategized, otherwise you will just maintain mass or get leaner and cut. What is important is weekly calories. 

So in my case, i try to hit 12,000 calories a week to look ripped. If i eat twice a week that would mean each feeding day would be 6,000 calories so i tend to eat healthy calorie dense foods in a day like oatmeal, bananas, raisins and coconut milk for example (am a struggling vegetarian btw) and seitan and beans. 

The results in this strategy is that i rip up and cut up, 6 pack and vascular. If i want to gain weight and a bit of mass, what i do is an alternate day fast which is a 48h window so if i work out tues, thurs, sun, i only eat on those days and only eat 2 - 3 hours after my workout and consume 4000 calories a day which makes me look bigger and my muscles rounder and fuller at the expense of a ripped dry look or i stick it out to 3000 calories a day to maintain the lean look with the goal of just having more days in a week to enjoy food. I try to finish my workout within 50 to 80 min and try to lift as heavy as my body can properly lift in good form. If you are new to prolonged fasting and want to bulk up, you first need to repair your body and reset your insulin sensitivity and your immune system. 

You can do that by going into a 72 hour fast then feed, then another 72hour fast, then refeed and so on until you burn all your excess fat and reset your body. Yes the muscles will look a bit smaller because the fat content in the muscles are also eaten by your body as fuel but once you reset your insulin sensitivity and immune system, when you adjust to an alternate day fast, which is technically a 48hr fast, you will notice your response to food is anabolic (assuming you only eat healthy nutritious food and stay away from junk) and that you are getting more defined. Just add 100-200 calories per feeding window to bulk up and reduce by the same amount to rip up. But as we are all different, you need to find out how many calories to add or subtract to your feeding window to get the results you want.