Plateau time again

Well, for the shoulder injury issue, you would need to check with your doctor on your limitations.
Definitely mix up your program and add in something different--whether it's weight training, HIIT or whatever and I would actually think you may want to increase your calories. Are you eating back your exercise calories? I am losing and haven't eaten less than 1500 and yes, I know everyone is different but 1250 for a male and exercise for an hour seems too low

Eat more

^^This.. and lift weights.

You are eating too little, unless you are a midget! But if you follow the forums at all you are probably aware of that. I reset my weight goals and it bumped me down to 1250 to lose 1/2 lb. a week. Friend said I need to customize it and so called a friend and he walked me thru the process. (ok, I am a bit inept at some of this stuff). Set it at 1600 calories and said I would lose 1 lb. a week. I dunno why MFP sets itself to 1200 or 1250 and then the customization says something totally different.

http://scoobysworkshop.com/calorie-calculator/

That is a site that was given to me. There is a huge thread on forums for roadmap which says to eat more to lose more too.

I don't want to eat 1250 calories for the rest of my life. For me this is a health thing, not one time lose the weight fast as I can, plus at my age I would get lose skin issues if I lost fast...eww.

And I think a plateau lasts longer than a week, but I could be wrong.

I am just plodding along, doing one day at a time. Wanted to reach my goal by Sept. I can see now that is so not going to happen, but I feel better and my body is thanking me daily for the weight that has come off, so will continue to be the turtle.

Good luck.

I have been exercising (mostly cardio) and dieting since the beginning of the year and I have hit my second plateau.

2nd?

I am thinking that I cannot cut my calories much more ( already at 1250 / day) or walk/run much more (about 1 hour a day).

Eat more, you are a man not a bed ridden old lady.

So the next step I think is to start weight training...am I right?

Should have been the first step but we will excuse that

The only problem here is that I broke my shoulder three months ago and I am currently a little restricted with how much I can actually do.

No problemo, http://www.nerdfitness.com/blog/2009/12/09/beginner-body-weight-workout-burn-fat-build-muscle/

Does anyone have any ideas? Should I just do core and legs for now? Or try to do arms / chest /back too?

Compound lifts

Strength training a must. I will add in my 2 cents that bodybuilding.com has some great programs for that. I too reached a plateau and became very frustrated that I couldn't lose the last 5 pounds so switched to sculpting the body and that has helped with the weight as well as toning.

two pounds a week isn't a healthy goal.

Why not?

It depends on how much you have to lose, and is the reason MFP recommends 1lb a week, for people with 50lb or less to lose 2lb a week isn't the healthiest way to do it because it would probably mean eating below BMR

Eat more

^^This.. and lift weights.

^^