Air resistance of your chest, sitting up is part of the problem.
Part of Mr Merckx, setting his Hour Record , was location .. lower air density of Mexico City , at altitude.
Inverse; a Friend's mother was on Bottled Oxygen As many with Smoking history people are ,
she moved from Colorado to the Salton Sea basin which is below sea level, in southernmost California ,
and with greater air density got off the bottled O2..
air resistance is greater the faster you try to go .. It's better if you were shaped like a fish..
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Last edited by fietsbob; 04-20-19 at 03:28 PM.