discouraged and disappointed

You must not give up. After running for years while in the military - my knees are just not my friends anymore... I completely relate to your situation.
I now walk. No aerobic, no jogging. Just walking - lots. And swimming - lightly. You can do this do not be discouraged! As you get lighter you will get more mobile. Believe in yourself!

Congratulations on the great success you've had! And if that's your actual pic, and you are actually 54, congrats on that too! Please don't be discouraged! Many of my MFP friends and I have joint issues, a couple having had, or in need of, knee replacements and we all actively use Leslie Sansone dvds. You didn't mention what type of aerobics you tried, but L.S. are "walking" dvds- actually low-impact aerobics (one foot always in contact with the floor)- and are gentle on the joints. Just find something that works for you!

Almost 7 years ago ,when I first started aikido on the advice of a friend, I was 39 years old, 285 pounds with bad knees and asthma and just really really out of shape. An hour of class would leave me soaked with sweat. It poured off of me. I panted like an overheated dog through the whole thing and was incredibly sore for three days after each class. I pulled muscles in my groin learning to fall and roll. I strained muscles in my shoulders. about a year into it I tore a meniscus in my right knee, making my knee problems much worse. I was so sore I could barely get out of bed in the morning and the pain was often indescribable.

Being a very overweight, large breasted female made wearing an all white outfit pretty uncomfortable. Finding uniforms that fit was difficult. I was clumsy and had difficulty keeping my body parts going in the right directions. It was kind of embarrassing. I felt about as out of place as a whale in a kiddie pool. Just deciding to walk into a dojo, a place I had never been and to be in close physical contact with people I didn't know took every ounce of courage I had. I was so far out of my comfort zone in every respect that it was a wonder I continued. My teachers told me recently that they did not expect me to last more than two or three classes before I quit.

I can't really explain why but somehow I toughed it out. I was determined. And I was learning and feeling things that, despite the discomfort, were new and wonderful and making me feel a little better about my life. I tested and achieved first degree black belt last June.

Today I am 245 and working on continuing to lose. My weight stalled out around 276 for quite a while until I learned about MFP and started getting food under control. Today I can easily train through two hours of class in which I a usually the teachers main demonstration uke. I get thrown repeatedly many times in a row and don't get winded. I am never sore after a class. I have done weekend seminars where I trained for 8 hours over 3 days and still had the gas to go to two more hours of class in my own dojo on Sunday night.

Anyway. I hope my example can encourage you. Okay you only did the warm up. A few months ago I bet you could not even do that. So do the warm up every day. Do the warm up until it does not make you that tired and then do a little more. Nobody will know what point you stopped at since you are doing this in the privacy of your home.

You have come so far already. You can do anything you put your mind to.

You can do this! I am 54 too and my knees and back and hip are not happy campers with most exercise from years of dancing and yoga. But I am going to keep on trying and hope you will too. Add me if you like ! I need to lose about 30 lbs and have been stalled for a year!

lol. I'm 29 and there are workout videos I can't get through, don't feel too bad.