Complete the reading passage. Write ONE suitable word in each blank from the box.

should          cycling               strength        gradually             exercise

Along with jogging and swimming, cycling is the best all-round forms of (31) _______ . It can help to increase your (32) ________ and energy, giving you a stronger heart. You don’t carry the weight of your body on your feet when (33) _______. It is also a good form for people with a pain in your feet or your back. You should start this hobby (34) _______ . Doing too quickly can have bad effects. You should cycle twice or three times a week. If you find you are in pain, you (35) _______ stop and take a rest.

Along with jogging and swimming, cycling is the best all-round forms of (31) _______ .