And how to develop muscles (without going to a Gym)?
gene therapy, perhaps? You'd need cash, some persuasive skills, and it's risky.(supposedly new non-viral vector techniques that simply inject the raw dna, achieve safe gene expression for months... if you're going to do it I'd recommend you find out more about these new raw techniques and use'em, viral vectors can do some nasty stuff)
As for muscle-fat ratio, I've heard CLA(conjugated linoleic acid, supposedly something found in beef, and dairy products.) is good, it seems to make more of the calories go on to maintain muscle mass instead of fat.
The randomized, double-blind, placebo-controlled study is the first to document the long-term safety and efficacy of CLA supplementation over a 12-month period without additional lifestyle or dietary restrictions. This clinical trial is an ensuing study to previous animal and human trials that found CLA improves body composition by reducing fat and preserving lean muscle tissue.
CLA has been clinically proven to aid in the maintenance of lean tissue and may help tone the body without necessarily causing overall weight loss. It is thought to do this by decreasing the amount of fat stored after eating, increasing the rate of fat breakdown and metabolism - helping the body use its existing fat for energy - and decreasing the total number of fat cells....
At baseline, there was no difference between the groups for either weight, BMI, body fat mass, or lean body mass. After only 6 months of observation, individuals taking either form of CLA experienced a significant reduction in body fat mass, while those in the placebo group saw no change.
Daily caloric intake and exercise was not different between groups either at 0 or 12 months and thus most likely did not play a role in body composition changes observed in the CLA groups.
I'd also recommend calcium for improving muscle-fat ratio, I've heard a 120%(1200mg) to 130%(1300mg) daily intake is the best quantity, and speeds up the muscle-fat ratio change(more than that shows no increase in speed, IIRC). Of course you can't take more than about 50% of your calcium daily intake per meal(supposdly you absorb up to 500mg per meal, and the rest is not absorbed), so you should distribute it amongst a few of yer meals.
http://www.nutritionadvisor.com/calcium_weightloss2.htm
http://www.florida-agriculture.com/foodprograms/calcium.htm
http://health.discovery.com/centers/womens/calcium/calcium.html
http://my.webmd.com/content/article/23/1728_56703
"Even in the absence of calorie restriction, three servings of dairy a day caused a significant loss of body fat and an increase in lean body mass," Zemel said. "Total weight didn't change, but there was a corresponding improvement in lipids, blood pressure and insulin resistance."
http://www.active.com/story.cfm?story_id=10701&sidebar=573&category=eat_right
The yogurt eaters lost 22 percent more weight, 61 percent more body fat and 81 percent more trunkal (stomach) fat during the 12-week study.[than placebo]
http://www.scienceblog.com/community/article1474.html
And as others have said, an increase in calories will yield weight gain. Meats, particularly beef, is good(cla), but there are some bad stuff in it, so you have to make the choice.
PS There's also my favorite supplement RESVERATROL, no it's not a drug or cheap sh@t. It's found in grapes, and wines. You can obtain it in a grape or grapeseed extract, just make sure it's a HIGH QUALITY supplement. It activates mechanisms akin to caloric restriction, that is it should confer some of its benefits(slow the aging process, confer added tissue resistance to a vast number of toxins/radiation, protection against cancer, diabetes, cardiovascular disease, preserved muscle and brain tissue through the decades, reverts to/preserves youthful expression of vast number of genes, and the like). I recently read that the sirtuin(enzyme) it activates is one that orders the body to burn it's fat storage.( note: do not consume dairy and resveratrol at the same time, the proteins in milk have been found to interfere with dark chocolate polyphenol absorption, it's speculated it might do the same with veggie, fruit plant substances. So try to keep your veggie, grapeseed extract for a separate meal without veggies, ok.)
Guarente—who has made a career out of studying sirtuins—and colleagues have now found that a sirtuin called Sirt1 promotes fat metabolism in mice.
http://www.ncbi.nlm.nih.gov/entrez/...bMed&list_uids=12939617&dopt=Abstract