Form of exercise (8)
'form of exercise' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for aerobics that I've seen before include "Keep-fit exercises" , "Exercise regime" , "Physical exercises" , "Exercises designed to strengthen heart and lungs" , "Fitness system" .)
'form of exercise' is the definition.
(I know that press-up is a type of arm exercise)
This is the entire clue.
(Other definitions for press-up that I've seen before include "Face-to-the-floor exercise" , "Form of arm exercise" , "Keep-fit exercise" , "Gymnastic floor exercise" , "Arm exercise while lying face down" .)