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Are you good at balancing on a normal bike?
I just feel this might tax a lot of abdominal muscles.
I could be wrong, though.
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You're not balancing this yourself. It has Segway-like self-orientation.
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Still need to hold on especially when you are at speed.
All ab, leg, and arm muscle there.
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No, which is how I'll convince myself to ride one given the chance.