Collins p o w e r e d b y c o b u I l d I w orfc

Work on your Phrasal Verbs 
Sport and fitness

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UNIT 14
keep up
E If you keep up an activity, you continue to do it and do not let it stop or end.
I can run fast over a short distance but I can't keep it up.
CD If you keep up, you move at the same speed as someone else.
Howard had to hurry to keep up with us.
slow down
X |f something or someone slows down, or if something or someone slows them down, they start to move 
or happen more slowly.
The driver slowed down and then stopped.
I NOTE I The opposite of slow down is speed up.
[2j |f someone slows down, or if something slows them down, they become less active or energetic.
You're working too hard. You need to slow down.
He had an injured leg, which was slowing him down a little.
speed up
If something speeds up or if you speed it up, it moves or travels faster.
The driver sped up as he approached the lights.
wake up
When you wake up, or when someone or something wakes you up, you become conscious again after 
being asleep.
In the morning I wake up and feel refreshed.
wear out
If something wears you out, it makes you become so tired that you cannot continue what you were doing. 
There is no point in wearing yourself out.
work on
If you work on something, you spend time and effort trying to improve it.
He has been working on his game all season.
I 
note
I You can also use work at.
work out
If you work out, you do physical exercises in order to make your body healthy and strong.
She worked out in a gym class three hours a week.
work up
E If someone works up a feeling, the energy to do something, or an appetite, they gradually develop it and 
increase it until they have what they need.
She went for a run to work up an appetite.
[H When you are doing something regularly, if you work up to a particular amount or level, you gradually 
increase or improve what you are doing until you reach that amount or level.
Repeat movements 1,2 and 3 four times at first and gradually work up to about six repetitions.