Question: Can Long-Term Use Affect the Flex, or Other Characteristics, of My Shafts?
Answer: Repeated, long-term use of a golf shaft does not affect its playing characteristics, so long as the shaft is not damaged (i.e., no kinking or pitting/rusting of steel shafts, and no chipping or delaminating of graphite shafts).
The idea that an undamaged shaft will "wear out" or suffer from "fatigue" to the point that it no longer performs the same after long-term use is a myth.

