Running 1:02:00 
shoes: Nike Free 5.0
Run through Royal Park with RHamil. Had a pack with 5kg or so in there, no sternum strap and old school canvas style meant it bounced around a lot and pulled wide on the shoulders. Was a good comparison to the new style packs that I've been using. Interestingly, the hipbelt really didnt matter... this pack just had webbing and a friction buckle and it was fine. I dont sit the hipbelts on my hips on the other packs when i run, so it makes sense. Anyway, this was over 10km, some nice long grass running, steep hills, etc. Warm, too.
note: after picking up the raft today (Friday) I definitely ran with more weight yesterday, which is a nice feeling.