I m having trouble maintaining my balance while working stocking grocery items, ie. leaning over to place items on a low shelf or walking in the aisle to another location with a carton to unpack. Listing forward or to the left side gets somewhat worse as the day progresses. Also have to be very cautious walking outside on rough ground to keep from tripping or falling. I m 76 and still working 8 hours 4 days a week. Norm Sill YYYY@YYYY