is running with a bagpack bad for you?

thats a good bit of stuff you have there in that backpack.  I don't think it would be TOO bad for you.  Just depends on how far/fast  you have to get to work.  I wouldn't recommend it for everyday though.

Not sure that running would be really good on your laptop's hardrive.  I know jarring can screw then up quite a bit. 

The bouncing up and down of 20-25 lbs would be an issue for me. 

I ride my bike over a monster hill to get to work.  If I get out of the saddle to fly up the hill and let my bag bounce around, then I'm sore the next few days.  Interestingly, if I minimize the bounce with straps and sitting most of the time, I seem to do ok.  Running has a lot more bounce so I would watch the weight.

I use to do ruck run races when I was in the Army with 45 pounds and I never suffered from injury. The important part to running with a back pack is to find one thatcan be compartmentalize and keep everything as close to your body as possible. Chest and waist straps are also needed for comfort. People will tell you that running with a pack is horrible on your knees, back and shoulders so keep that in mind after you get back from your runs.

It's a problem if you try to run as much or as fast as you would without it.  You're basically adding additional stresss to your body.  Just like with running in general, as long as you build up that stress gradually then your body will adapt.  Stress it too far, too fast and you will end up injured.  Obviously, using a good pack that allows you to distribute the weight well, will help.


Edit:  And to the poster above, clydes and athenas should generally be even more careful in building their running up since they have more relative impact to their joints.  It's not that they shouldn't do it, but they should be careful to ensure their body adapts to the increased stress.  So not different, just a greater degree.