The reason I'm so tired lately is the lifting that my job entails. From waist level to about mid ribs, up to about 90lb 40 or more times an hour for 8 hours. Some bending to set stuff in bunkers. Well sort of bunkers. Anyway finished lumber or decorative purposes, molding for doors, windows, etc. Some big baseboards and crown moldings that measure up to 5" wide and 1/2" thick... I'm exhausted...