no motivation to exercise

Start with walking. Go at your usual pace first,then a little faster. Walking helps with relaxing and it can also be a good workout

But as I read above,find what you like and then just do it.

Sometimes the hardest part of exercise is putting your shoes on. Do that first and then just do it.

You should find something that you enjoy doing. For me, that means Zumba. It's my main form of cardio, and I love it because it doesn't even feel like a workout.

I suggest trying something other than walking on a treadmill for an hour. There are so many other fun things you can do like cycling outside, swimming, kickboxing, etc.

I know getting started is the hardest part, but you can do it!

I found some fun zumba routines on youtube. A good channel to look up is the one by Lauren Fitz. She mixes some hip hop into zumba moves and it's very fun (just with less of a latin flare). She has a good selection of songs to pick from ("Timber" is a good one). If it's something you like, there are tons of free videos on youtube that you can exercise with without paying money (and do it in your own home).

So don't. Don't make it into a chore or something you "have" to do. Unless and until you are excited about something "oh my gosh, I'm so looking forward to seeing this waterfall everyone talks about at the end of this hike. I heard it's beautiful." or "I haven't gone rollerskating in ages. This is going to be so much fun!" don't bother. As you get slowly more active, "exercising" will become easier and more rewarding.

Sustainable changes happen one day, one habit at a time. No reason to rush things :-)

Oops, double post!

For the unmotivated to exercise: here's a true story. I hope it motivates you.
Several years back when I was 18 before starting my first year of college. I decided to make a change. Honestly I don't remember what precipitated this. I just started going out and walking a couple miles a day. I was 188 pounds at 5'2. As weight came off me, my walks became easier, and at the time, we had a membership to YMCA so I went there too, to cross train. I got to know lots of people there and looked forward to coming into the gym and greeting everybody everyday.
One summer day the gym was closed. At that point I had lost about 40 lbs and I was really bored of walking (too easy, needed more of a challenge). So I just ran that day. I didn't know how long I ran at first. I decided to do the route I normally did walking twice. I found out after that my very FIRST run ever was five miles. It was easy. I was like "look what my body can do. I rock. I can kick @$$" and I can. I went on to do the tufts 10k for women, then several half marathons for charity, then my first marathon was new York city. Ill never forget at 20 miles how I hit the wall hard, tired and unable to move, but a man leapt out from the crowd and said "I've been there--but you worked hard for this--keep running! You can do it!" I was the little engine that could--"i think i can, i think i can---i KNOW I CAN, I KNOW I CAN."One hour later, in central park, I cried as a lady put my finishers medal around my neck. I went on to do the Chicago, new York again, then Boston marathon. I also did Honolulu a few times and San Diego rock n roll. I'm doing my 8th next year. I know now I can do anything I put my mind to. You can too. Head into that gym or out for a walk or whatever you feel comfortable doing g to move your body. You never know what may come of it. It is an awesome, inspiring feeling. I workout 6 days a week. I cannot imagine not wanting to or making some sort of excuse not to move my body. It might be hard for you at first, but after a while it feels wonderful.

You know what, without reading what everyone else has said, I'm going to say: you'll get there when you get there. For now, if you can get your eating under control and you're being successful with your goals in that area, that is AWESOME. Sometimes, I don't want to work out for weeks at a time, and I just focus on staying under my calorie limit and that's it. And -- I think that's okay. Not all of us are instant athletes, or constant athletes. There are times when I love working out, I'm in a groove and a routine, and I work out hard and often and consistently. But -- I can't always maintain it. It happens! Just try to make a plan for beginning to work out at SOME point, and you will get there if you're motivated enough.

About a 10 second look in the mirror should be enough. That's what it took for me years back. Sure you don't need to exercise at all to lose weight. But without exercise, you will over time and age is no friend here develop bat wings. You know the floppy skin on your underarms that just hang there when you raise your arms. Or the ole skin kind of wrinkled above the knee cap due to no quad toning. Or the cottage cheese look in the glute area. It is nice and healthy to lose weight without exercise, but I prefer not allowing my skin to flop in the wind. Good luck.