The gym I used had massive KBs that were quite light and there were some little ones, obviously all metal instead of sand-filled plastic that were killers.
These ones are not little, nor light. Definitely going to use 20kg for the 500 swings...
@Acliff started
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The gym I used had massive KBs that were quite light and there were some little ones, obviously all metal instead of sand-filled plastic that were killers.