Last year's cycle trial event showed how road closures can effectively reduce local traffic pollution but endurance athletes are especially vulnerable to ground-level ozone because of their accumulated pollution dose during long events.
The feeling was that with the advancement of age he was now just a little vulnerable over five sets, that his endurance could be tested and even exploited by the younger guns.
It has demanded new resilience — not only from Haitians and Haitian-Americans, who often lay claim to a legendary, divinely inspired endurance, but also from faith itself, suddenly more vulnerable to doubt, disillusion and competition.
As a vulnerable group, females are significantly different from males in terms of physical function and mental endurance.
It is clear that family caregivers of dying patients find themselves in the most vulnerable and fragile positions they have probably ever occupied, with a level of physical exertion and emotional endurance probably unrivaled by any other experience they are likely to encounter.
The Land Cruiser's steel body is more vulnerable to rust than the Land Rover's aluminum husk, but Cruisers have a great reputation for reliability and endurance, with engines routinely lasting for 200,000 miles.
As films of the teenage Girls Aloud show them looking wide-eyed and vulnerable, their Abbaesque version of the Pretenders' I'll Stand By You transforms into an anthem of togetherness and endurance.
