WHY THIS HAPPENS
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Hand numbness (ulnar nerve): pressure on the outside of the palm from poor handlebar position
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Hand numbness (median nerve): flexed wrist position stretching the carpal tunnel
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Foot numbness: cleat position too far forward, shoes too tight, or overly aggressive arch support
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Saddle position pushing too much weight onto hands
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Stem length or reach too long — stretching to the bars
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Fore-aft saddle position too far forward — weight on hands instead of sit bones
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Cold weather + compressive gloves/shoes compounding circulation issues