Duh...
probeer zijn oefeningen maar eens:
Citaat:
1. Sit with your back firmly against the wall. Slowly bring your head back so it too is firmly planted against the wall. This will ensure that your head will not tilt back and the pressure will all be placed upon the lips.
2. Push yourself until the pain is unbearable before stopping. You want to make sure you have pushed yourself as far as you can so your endurance will build. Eventually the pain will stop.
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zo...! En.....? ben je er al achter?
