D. conscious

"Health and fitness are for everyone conscious of discipline for a good diet and exercise."

B. regular

"Health and fitness are for everyone conscious of discipline for a good diet and regular exercise."

C. To

"To feel that the body is no longer able to perform."

D. considered

"Aches and pains are considered normal."

B. pushing

"Instead of pushing the body to do more, activities become limited."

A. active

"Examples have shown us that older people can and should be active."

B. competitive

"Some professional athletes stay competitive into their forties and fifties."

C. shape

"Simple activities like walking and swimming are all that is needed to stay in shape."

D. do

"In the winter, do indoor exercises."

B. unless

"Of course, such exercises will be of little use unless you follow them with good diet choices."