scientists are trying to develop new treatments for heart attack victims by monitoring the effects of running on a treadmill on geese.
Researchers hooked the birds up to sensors then encouraged them to waddle as fast as possible while altering the amount of oxygen they could breathe.
They discovered the bar-headed geese could hit top speeds even when the oxygen levels dipped to seven per cent.
The bizarre experiment at the University of Exeter was designed to mirror the conditions on Mount Everest where the creatures thrive in spite of the thin air.
Researchers want to know how they can exercise at such low oxygen levels so they can consider how humans might be able to better cope with heart attacks and strokes.