The results have been great - no need to spend time preparing for practice with exercises of scales, no injuries, helps with fatigue, has extended my reach significantly.
For most activities, performing that particular activity at a low-impact level is a perfect warm-up. Thus, there is nothing wrong with playing scales. One could likewise say "no need to spend time preparing for practice with a brisk warm-up walk". In fact, I believe that what concerns piano playing, there is no need for a "warm up" at all. Sit down and play. Just don't start up with the most virtuosic passages if that helps. Many pianists would even argue that one should be able to play anything "cold".Although playing the piano is often compared to an athletic activity, I think it's not that much of an athletic activity that one has to worry too much about warming up. On the other hand, going through such a routine (stretching, etc.) doesn't hurt too much either if done properly.
i sort of agree with everyone here- i agree that doing some kind of physical exercise is beneficial- for me if i go for a power walk before practicing my hands are always good to play. however i can have a hot shower and then my hands will be good to play (a bath on the other hand wouldn't be great mentally cos i'd fall asleep!). however just straight scales also warm my hands up so i'm good to play. the problem withall three of these is that when i get around to performing i don't necessarily have the opportunity to do any of these thus they're useless. in which case i'd agree with ted and xvimbi saying just going straight into the pieces. it'd probably be good in getting used to playing in that situation and i wouldn't be so paranoid about it. which'd be ok in summer, but winter, i have weird circulation issues and my hands and feet get super frozen, but my cool peter alexander jumpers help that (the sleeves go right down to my hands and have a thumb hols- so like gloves but completely withoutt he finger holes) and they keep my hands warm without restricting movement in any way. anyway i'm waffling.i agree with you all!!
i have no idea if i have raynoauds syndrome, i have just googled it and could potentially have it- i dunno