Altitude training could decide the extent of Hamish Bond's cycling time trial dream.
Bond, wife Lizzie and two-month-old daughter Imogen have packed up and headed to Colorado Springs at an altitude of 1839m. That's where he will be based for the next month, testing his mettle in rarefied air.
The 32-year-old has previously only ridden at that height for about 15 minutes, through a pass in France. In Colorado, he'll hunt oxygen for two to three hours at a time.
Bond has previously admitted to getting satisfaction from doing things other people would not, as two Olympic rowing gold medals and eight unbeaten seasons in the pair with Eric Murray will attest. Cycling keeps offering a fresh canvas.
"Altitude training presents a big part of a lot of successful endurance athletes' calendars. It's something I've never tried before, so given my need to make improvements, it seemed an obvious thing to do.