Meredith, a sixtysomething CPA from Brisbane, tells us she wears her backpack on the StairMaster at the gym.

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This could include continuing the bike and using the elliptical machine or StairMaster.

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And if someone futzes around in a workout, then the punishment comes in the form of 300 floors on a StairMaster.

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Then, about a year and half ago I hurt my leg, and I couldn't run for several months, and I began to work on the Stairmaster.

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Greenberg and her team of students travelled to Burma, and devised a cheap and efficient treadle pump that looks like a Stairmaster, which the farmer steps on in order to extract water.

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The other Rio, the rounded S30S, is being aimed at people in the gym who wear a radio strapped to their arm while they run on the treadmill or climb the Stairmaster.

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