1.   Frequently our younger engineers had leisure activities involving strenuous physical activity.

2.   The doctors advised against any strenuous activity for six weeks.

3.   And he says he can no longer summon the energy, mental or physical, to engage in the more strenuous activity of writing.

4.   And the townspeople, most who needed their sleep because of the strenuous activity of the previous day, were wide awake.

5.   And the outdoor education organization Outward Bound has offered to sponsor its second school, which would bring to the classroom its emphasis on strenuous physical activity and teamwork.

6.   And women may unknowingly be using the wrong muscles during strenuous activities, a new study has shown.

7.   As long as the extra heartbeats continue, doctors are advising that Horry not participate in any strenuous activity.

8.   As New York City activated its emergency operations center Tuesday, Giuliani appealed for residents to avoid strenuous activity and stay indoors near fans and air conditioners.

9.   Athletes - and others who perform strenuous activities outdoors - are prime candidates for dehydration, which is accelerated by extreme heat and humidity.

10.   Avoid strenuous activity.