I could jog on my way home, but since I sweat a lot, running to work is probably not a good idea. I've thought about biking, but it'd be a hassle because of the narrow staircases in my building. The subway is just slightly faster than walking (when it's on time anyways)
In any case, I do ~6 hrs of martial arts per week, and I find that walking is a nice low-impact type of activity to complement it.
Well, you have to factor in changing out of your running clothes and showering if you're in a "professional" environment.
Also I have bad knees that make even the mile I walked to the job I just quit a little difficult. I doubt they will ever heal enough that running is a good idea.
I had bad knees for years, but found that running exclusively up-hill on uneven ground for about 2 years completely cured them.
This might not be practical or work for you, but I found a steady improvement after I started walking gently down hills and only running up. I also made a conscious effort to minimize the impact of each footfall.
After 2 years, I found I could even run downhill again without pain or injury.
You can try bicycling, it's faster and you won't sweat unless you have to go uphill. Also, if your office has showers (a rare but nice feature) you can go running/bicycling and have a shower.
