How to lift your backpack
Although sitting in an office in front of a computer day after day can more frequently lead to lower back pain than hiking, it is wise to be careful when shouldering a heavy backpack. Here is how to do it:
Put one foot on a bigger stone. Pull the backpack up until it stands on the knee. The backpack is now already at the proper height.
Move the arm at this side under the corresponding strap and take the backpack on one shoulder.
Slip with the other arm through the other strap.