Alright ladies I need some ideas here. Despite my walking patrol 5 days a week I've still gained 3 lbs since I started this job, putting me back up at 319. Here's my problem. I'm not a morning person, I am a night owl by nature. I don't have time in the mornings before work to make it to my gym (a 20 minute drive), do a 45-60 minute workout, back home to shower and get back to work on time. At the end of my shift, I'm already tired due to my patrol so I don't go to the gym then either.
I need some ideas for cardio exercises I can do in my guardhouse prior to my patrol. But there are some limitations. I have to be able to see incoming traffic so floor exercises are out. With the problems on my left knee anything that requires jumping (such as jumping jacks, etc) is also out. I have a set of hand weights, I have a roughly 3 foot by 7 foot opening of floor space. I don't know if the counter would hold my weight so I'd prefer not to use it. I have a stable chair and a rolling computer chair.
So with that said, does anyone have any ideas for some form of cardio exercises I could do?