working out after work.. possible???

It's definitely possible and might make you feel more energetic! If I were you, I'd have a small snack as soon as I got home and then immediately get dressed and go work-out. If I worked 12 hour days, I'd probably do 30-45 minutes on those days and then 1 hour on off days. You can do it!!

Is it an option to run/walk/cycle to and/or from work?

I have to work out after work as well. During the week I work 2-10pm and on the weekends I'm usually doing a 12 hour shift, but just make myself go to the gym. I do it after work during the week because my wife and daughter are usually already asleep so I can still get my workout in without taking time away from my family. Good luck!

Eeek! I was going to say it is totally possible until I saw that you work 12 hour shifts. Ouch. Right now I work 8 hour shifts, but drive an hour each way, so my day is 10 hours and that is hard enough! You will find a way to do this though!

Find someone that works the same shift as you and go walking or jogging right after work...that is how I get mine in 4 times a week! If it weren't for my workout buddy, I don't know if I would be as motivated!

I work 10 hour days (7a-5p) with a 40 minute commute each way, too. I'm already up at 5, so waking up earlier is not really an option haha but I am also too tired when I get home...so I've started exercising on my lunch break! I only get 45 minutes, but I've done a few 20-minute brisk walks or slow jogs, which gives me enough time to change into/out of workout clothes, and enough time to grab a small snack. So that's my cardio for the day. Even though I NEVER feel like doing it, and I'd always rather relax and eat my lunch, I always feel great afterwards and it's nice to feel the sunshine after being in my office all day. It's the only daylight I see during the week!
And then I usually do a strength training/circuit training for 20-30 minutes or so at night...something that makes my muscles work hard!
Your workouts don't need to be super-long, because mentally preparing yourself for an hour of working out is harder than actually doing it, especially when you're exhausted after a long, stressful day at work. Try to find super-effective workouts instead, like HIIT, circuit training like 30DS or NerdFitness Body Weight workouts, or setting a goal like "Run/Walk 3 miles every day for a week." Good luck!

I also work long hours and struggle to work out after...I usually spend all day trying to convince myself why its okay if I didn't go, haha. What works for me when I am really tired or dreading the gym is to set my goals for the workout low, like 10-15 minutes of cardio and I tell myself something is better than nothing, right? It is a lot easier to convince myself to at least set foot in the gym, which is always my biggest hurdle. If Im having a bad day and struggling and can only do 10 minutes than hey, I reached my goal and did SOMETHING. But what usually happens is I get started and I feel great and those tend to be my best 60+ of cardio days. And in turn, I sleep better when I finally get home and I have more energy for the next day.

Goodluck! Remember SOMETHING is better than NOTHING, and you WILL feel better if you go.

Don't let yourself sit down when you get home. Put your work out clothes on right away . That is when I feel I have no other options. If you let yourself relax on the couch when you get home you will never get up!