"A well-known strongman, world's record holder and ex-world's champion weight lifter has put it on record on several occasions that he never trains for a record lift without a strong chest expander.
He has given full credit to this type of chest expander, and I am quoting him here in order to endorse what I am about to say from my own experience...
"With but little training I have made records on the "dumbbell swing," the "single handed press," the "Crucifix" and on some special feats of my own. I wish to make it quite clear that not only my muscular development but my great strength as a weightlifter and strongman was obtained solely by the use of the chest expander."