Even for someone fit, the climb uphill is testing.

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They give him a field impairment test (FIT test), examining his eyes and testing things like his balance and co-ordination.

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Athersys is testing a stem cell product called MultiStem that could fit the bill.

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My testing will be a breeze because I am physically fit.

CNN: Student log: Charna-Marie Dixon

It would have to be safe in crash testing, smooth on the highway, maneuverable around town and compact enough to fit into a crowded city garage.

CNN: A reality check on Tesla

Committee chairman Anne McIntosh said the FSA has to become more "fit for purpose" and should be given statutory powers to force producers to carry out testing.

BBC: Chiller room in a slaughterhouse