I have seen numerous top trainers recommend this as well as top bodybuilders utilize bananas post work out. Evan Centopani comes to mind, Hany Rambod hell Nark has it in with my pwo nutrition.
I remember DSM posted a 10 top myth about pwo nutrition myths and one of things it suggest that protein synthesis is our main goal pwo and using fast acting carbs helps us accomplish this.
Also the belief that fruit is just pure fructose is false it in fact contains a mixture of fructose, glucose, and sucrose which can be used for both muscle AND liver replenishment.
Bananas will cause a rise in blood sugar as we all know we would like a high spike of insulin pwo workout (the reason why insulin itself is utilized pwo), also the high level of potassium which is lost pwo, low cholesterol, and low fats pwo instead of utilizing something such as oats. Also the ability to digest so fast is very beneficial as we can then eat our meal sooner.
I have traveled to other boards and I understand there is a ton of debate on low GI and high GI pwo but for me I don't give two shits about how much science one can pull.
Done low and high GI pwo and I'll personally stick to the high GI carbs when bulking as I become much fuller pwo and hunger sooner then when I eat a low GI carb. I go how I look and feel, not what some science nerd on a board half my size thats telling me what science says cause we all know science and real world application can have different results; though I will utilize their advice to formulate what works for me.
But just so you know I'm not full out it here we are.
The studies reviewed here indicate that nutritional mixtures containing protein hydrolysates, added leucine, and high-glycaemic CHO greatly augment insulin secretion compared with high-glycaemic CHO only. When post-exercise hyperinsulinaemia is supported by protein hydrolysate and leucine ingestion-induced hyperaminoacidaemia, net protein deposition in muscle should occur. Thus, post-exercise recovery drinks containing these nutrients in conjunction with appropriate resistance training may lead to increased skeletal muscle hypertrophy and strength. If so, such post-exercise supplements would be of considerable benefit not only to athletes but also to anyone who has lost muscle function through disease?for example, Duchenne muscular dystrophy. Future studies should evaluate their long-term effects on body composition and exercise performance.
The full article:
http://bjsm.bmj.com/cgi/content/full/40/11/900