I like to begin my day with some simple slow warm up exercises. I’m not a big believer in hard stretching. To me it sounds like something that could be risky. I’m particularly opposed to stretching one hand by pulling or pushing it with the other, or by using a wall or other object for resistance. For me, some slow finger movements on the instrument, actually playing, that is, seem like a good safe way to get the muscles warmed up and limber.
The key here, of course, is that these warm ups must be played slowly. I like to start out by playing a little slower than one note per second. I simply place my left hand first finger on the third string first fret (G#) then play A with the second finger (not picking the first finger up), then adding A# and then B with the third and fourth fingers, respectively. In each case, I place the finger on the string very carefully, trying, as it were, to put the groove in the correct place on the tip of the finger, and placing the finger as close to the fret as possible. I repeat this set in second position, and so on, up to ninth position. Then, I descend back to first position in the reverse order (4-3-2-1, etc.)
I repeat this exercise 4 times, once with index-middle alternation, once with middle-ring, once with index-ring, and finally with the thumb. Here is a video in which I walk you through and demonstrate this exercise. Try playing along with it!
Fast Tube by Casper