In the following passage some words have been deleted. Fill in the blanks with the help of alternatives given. Select the most appropriate option for each blank.

The importance of physical exercise in (1)_________ the incidence of heart attacks cannot be under estimated. The rise of heart attacks has been attaining (2)_______ proportion in recent times causing grave concern specially to the medical (3)______. Walking is the best mode of physical exercise which (4) ________ no equipment money, material or (5)______ of a club.