11.   Some of the tasks required considerable physical strength.

12.   The interviews went beyond the issue of physical strength.

13.   The murder could have been committed only by a man of enormous physical strength.

14.   The physical strength of these bodies is a major factor in determining how hazardous they are.

15.   They build up physical strength, stretching their limbs and testing their agility.

16.   They were well-intentioned creatures of abnormal physical strength and they were easily taken in by women.

17.   ...an astonishing display of physical strength.

18.   Working on a farm requires a lot of physical strength.

19.   For reasons linked to the physical strength needed to operate them at the beginning, spinning mules were operated by men.

20.   In these circumstances the British were able to exert more influence over the development of defence thinking than their physical strength strictly warranted.