As I have continued to read on the metabolism I'm also becoming less convinced of the protein sparing of fasts. As we have no way to store amino acids, any abundance of protein we ingest will be oxidized or simply gotten rid off. I have more or less become convinced of the greater benefits of a steady stream of ingested proteins, such as Lyle's modified PSMF. I happened to see some graphs of a study in Exercise and Sport Science by Garret & Kirkendall (see
link to Google books) where 3.3 grams of protein were ingested per kg, and whoa... they gained twice as much as those who ate 2 grams/kg over a 4 week period (2,8 kgs vs. 1.5 kgs). I have no clue as how much calories they ate (must check up on the study), but according to another source hypertrophy will occur during complete starvation, but protein will modulate the magnitude of hypertrophic response. Lyle's modified PSMF is based on proteins, omega-3/vitamine/mineral supplementation and a lot of veggies. Upping the proteins to 3.3 grams/kg/day might be potent enough to actually grow on. That's a lot of protein to eat. For me, that's 250 grams a day (ouch, that would be expensive too).
I'm sorry if I have misled you on IF, Quad. I have been doing IF whenever I had opportunity ever since, but it is hard to be a social person with this diet, eating breakfast or lunch with the family (and it is soo hard to get enough calories in during the few evening feeding hours). After reading Lyle's The Rapid Fat Loss Handbook, I've added more protein to the 'fast' and eating more veggies. I'm not sure if I can grow on this, unless I get enough protein... I will not drop IF entirely, but somehow I need to get more calories in. Snacking proteins might be a solution. I'm also making sure I get my protein shake quickly after my workout. The future will be judge of this ongoing experimentation.
Edit: The study reported on was Fern BE, Bielinski RN, Schutz Y. Effects of exaggerated amino acid and protein supply in man. Experientia 1991:47:168-172 (
link)
Edit2: For more info see 'Optimal cutting/bulking PSMF/IF' thread.