I sometimes dont use my thumbs while warming up with 135 or 155. When I going past 200 I use my thumbs.
Only quoting you to get us back on topic mate -
Mike Mentzer used a good example in his HIT dvd about using thumbs or not (he advocated thumbs) by getting someone to hold his forearm with and without thumb grip. I've tried it and its so easy to get your forearm away without the thumb gripping - so for me I'd use it everytime...
If we always knew in advance of an accident coming - there would be no accidents!
