Ectomorph: This is your regular skinny person who never adds weight no matter what they eat. I am sure we have some friends like this. They are lean built, has little muscle and no body fat. they alway have trouble gaining weight. But if they choose to build muscle or gain weight, they will have to do heavy muscle training, do little cardio and consume more calories than they burn.
Endomorph: this is really common, heavy built, gains weight easily and struggles to loose body fat like myself. To maintain a healthy weight balance we must burn more calories than we consume. A vigorous work out regime, exercise for 4 to 5 times a week. Also do lots of cardio like jogging for 30 minutes daily. Eat 5 small meals a day each meal should comprise of mostly lean protein and green vegetables remember everything you chew on is a meal. Avoid regular junk food like sweets, soda etc.
Mesomorph: This is the ideal body build. Easy to gain if he chooses and easy to loose. This body type is great for body building.
Every one has a combination but each individual predominantly leans towards one, so find you and enjoy your weight loss or weight gain.
*There is no guarantee of specific results and results may vary for individuals.*