Im 5ft 6 115lbs how can I put on some healthy weight and get up to 120-125lbs?

fuel up on healthy, carb rich foods before workout so you're not burning calories you need to add mass and make sure you take protein afterwards.

Drink a GALLON of WHOLE milk a day. Eat plenty of eggs, lean ground beef (or other red meat), tuna, almonds, walnuts, whole-wheat pasta, multigrain bread, beans of all sorts, and plenty of raw vegetables and fruits to balance it out. You should be eating a meal every 2-3 hours and consuming between 2000-4000 calories a day. Also make sure you are getting no less then 6 hours of sleep a night.

Get a workout that looks like this, and make sure you start with a fairly heavy weight 75-100 lbs and make sure to rest at least 2 minutes between working sets (not warm up sets):

Workout A:

Squats 3 sets of 5

Bench press 3 sets of 5

Dead lift 1 sets of 5

Workout B:

Squats 3 sets of 5

Shoulder press 3 sets of 5

Power Cleans 5 sets of 3

Alternate every other day (EX: Monday – workout A, Wednesday - workout B, Friday - workout A. Next Week: Monday - workout B, Wednesday – workout A, Friday – workout A. Etc.) Add 5 lbs everyday (10 lbs to dead lifts).

You should warm up for each lift like this:

2 sets of 5 with just the bar

1 set of 5 with 25% of the weight

1 set of 3 with 50% of the weight

1 set of 2 with 75% of the weight

You can add dips to the workout if you also want prettier arms.

If you want more details about this workout you can find everything you want to know at http://startingstrength.wikia.com/

lift weights, eat lots of tuna and chicken they are high in protien and will help you build muscle. Drink skim milk, and eat lots of green vegetables. Doing all this along with lifting weights will get you up to the body weight you wanna be at....Here are some videos that might help you

http://www.youtube.com/user/Superfitforlife

Mussles!!!

Just dont put on any fat.

im 5'7 125, and as often as I get told your a healthy weight, skiny ect. I still want to lose some weight, or tone up !

Protien shakes really help with that. I know my old bf put on about 40 pounds of muscle when he started taking the shakes. He got his from Vitamin World online. You probably can to :)

http://www.vitaminworld.com/pages/file.asp?

xs=B6716599D5414CA58A9705CB5C318CAE&PID=1676&CID=593&CPID=2885

lift weights, eat lots of protein and complex carb rich foods.

Try to eat some high calorie foods that are also good for you. How about some nuts (packed with calories and fat (good)).