ANKLE TWIST/KNEE INJURY

You can lose without exercise--most of weight loss is a calorie deficit. As for exercise, you can always try swimming. When your ankle heals you can bike or use the elliptical.

As long as you are moving you are burning calories. Fidget when you sit to watch TV or walk in place. You can also use canned food as weights when you are just sitting. Pace while you wait for food in the microwave. Listen to upbeat music, it tends to put a little bounce in your step. Swing your arms like a madwoman whenever you get the opportunity. If you sit at a desk or computer bounce your legs if it doesn't hurt your knee/ankle. Basically do anything you can think of to add extra movement into your day.

Plus like the above poster said, losing weight happens in the kitchen getting fit happens in the gym. You are just starting your journey so don't worry about what you can't do, just do what you can and be pleasantly surprised when you can do things you never thought you could.

I started my journey with a double knee injury and had lost all range of motion in both knees. I have osteoarthritis in both knees, they are bone on bone, and can be extremely pain and limiting. I started getting Synvisc injections a year and a half ago, and the difference is incredible. The thing with knees is that once they are damaged, they go downhill, but honestly, the worst thing you can do for them is to NOT move. I began with chair exercises to keep strain off of my knees, there are a lot on YOUTUBE. Also, water aerobics is great when you have knee/ankle issues. YOUTUBE has a really huge amount of helpful exercise videos for those with limited mobility. The more you move, the more you will be able to move. You should always check with your doctor and/or physical therapist about which exercises are safe before starting. Also, the Tony Little Easy Shaper is great for very large folks to get started with a safe and effective exercise routine. I love mine!

I feel for OP because the first time I became truly overweight was after a Jones foot fracture when I was in a cast for 3 months. Not only did I gain when I was laid up, but I continued to gain afterwards because my metabolism had slowed down. I had a milder injury last summer, a sprained tendon. What I did was pilates, yoga (favoring the good leg or going on knees for some positions because downward dog could be strain), and upper body training. I didn't lose, but I didn't gain. Also, you have to really watch your food because you're not burning the way you do just walking around.

There are free Zumba Chair workouts on youtube. You can work out while sitting in a chair.