QUOTE(AmandaL @ Dec 15 2006, 02:02 PM)

QUOTE(Tess @ Dec 15 2006, 11:53 AM)

Practise just ten mins twice a day if you are a child. Thirty to forty mins twice a day if you are older, or, if you consider yourself an adult, then, 1 hr twice/thrice daily - if you can still afford all that time!
No way should a beginner of any age practice for an hour a day, let alone one hour twice or three times a day. It takes months for the left shoulder and upper arm muscles to develop properly. Tired muscles leads to bad posture, which in turn leads to injury and somtimes irreversible bad habits. The bow arm has similar issues with stamina building.
Twenty minutes spread out over the entire day is enough for any beginner on the violin. This can be increased gradually as stamina and muscular strength builds.
Yes, of course, it is gradually built up but you can do it!
I think VN (who was very nearly eight when she began) said she practised for about 10 mins (before and after school) for about a term when she first started. It was her decision to treat it like brushing her teeth and I remember once laughing at her seriousness when she shut her door. Now she has had the last laugh. However, she also told us she did MUCH more practice in her third term due to her exam. So maybe it doesn't take long before your muscles get used to more work.
I still believe though that it depends a very much on your teacher. If your teacher could supervise your practice just once, or, alternatively, show you exactly what to do for practice, then, it's much more likely that you won't get bad posture, tense shoulders/muscles and so on, even though admittedly, learning the violin still looks hard and you do have a lot of checking to do whilst practising. I have always reminded my child before she leaves home for her lessons that it's better to ask (her teacher) questions when slightly unsure and look daft than to keep quiet, look clever but be at a loss later during practice. I simply cannot help her myself.
In short, EXPECT to work hard,

gradually, but surely you should expect a lot from your teacher. You pay him/her to make your learning ENJOYABLE, not insanely hard!
That's my tuppence worth.