Watch the 2-5-1: Key of G online guitar lesson by Frank Vignola from Next Steps Jazz: 2-5-1 Progressions
This jam track is set at a more commonly played tempo. It is easy to tense up playing faster tempos so make sure you keep your wrist loose. If you begin to tense up then go back to the previous section and play at a slower tempo until you feel ready to play the faster tempo. Metronomes are great tool as well to help you build up speed.