补充词汇：
press-up: a physical exercise in which you lie flat with your face towards the floor, and try to push up your body with your arms, while keeping your legs and your back straight.
constant: happening a lot or all the time.
用以上词汇完成以下的短文：
I'm not as ______ or ______ as I used to be, and I was beginning to feel quite ______ and ______ first thing in the morning, so I asked a friend to ______ a workout routine for me. First I ______ ______ with some ______ and ______, then I go on to something more ______. I don't like ______ -- I find them ______, and I also have a ______ elbow problem. I prefer to ______ ______ jogging and ______ because I enjoy the ______ change of activity.