It is started in the passage that_________.

* Hướng dẫn giải

Dẫn chứng: As for the actual jogging, the secret is to start gently, and not to do much at the beginning – especially if you haven’t had any exercise for a long time. Try a mixture of walking and running for ten minutes about three times a week at first. Once you are happy doing that you can then start to increase the amount you do gradually.