Through her monthly chemotherapy, Fitzgerald dealt with nausea and fatigue. Her treatment was going well, and side effects were mild, so Fitzgerald thought the worst could be over.
The information it provides allows a coach closely to monitor the stamina of an athlete, determine his level of fatigue more accurately and help work out where he might be wasting energy.
On a tiring afternoon I'll habitually monitor my odometer and do the math - 23 miles to go, two hours if the wind doesn't turn; I'll be in my motel by 5:15.
And in addition to helping individual soldiers, the system can also benefit those in the command centre, by indicating when a particular unit has its hands full or is too tired to move elsewhere.
ITF is campaigning to protect seafarers' right to shore leave as essential to their rights as workers, and to minimise the effects of fatigue through work at sea and thus ensure maritime safety.