>The 'knots' she is refering to are probably trigger points,
>which are points of tension in the muscle (which can cause
>pain in a completely different area). They are not
>specifically from weight lifting, but can be due to just about
>anything: from sitting at a desk for long periods, to not
>stretching enough.
This is where my knots come from - sitting at a desk in front of a computer all day. Ugh. x( My massage therapist really has to dig in to my trapezius every time I see her, and the knots just won't give up the ghost. Massage helps, but doesn't completely eliminate them.
Massage therapists will also call these trigger points "adhesions", and it's basically a place in the muscle that has contracted so much that it is "stuck" in the contracted state. They are caused by many things, but should definitely not be considered NORMAL. They're quite bad for your muscles, and can limit your mobility and strength severely. This is why I get regular deep tissue massage - to prevent msyelf from becoming a big ball of adhesions. The massage hurts, but in a good way.