How about instead of an age limit you need to meet certain criteria - at least one joint in your body must creak, pop, crack or ache when moved.
Only one joint that creaks, pops, cracks, or aches? I'd say we set the minimum at 2 or 3.
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How about instead of an age limit you need to meet certain criteria - at least one joint in your body must creak, pop, crack or ache when moved.