Guitar teachers love to give students the chromatic scale as an exercise, I see it all the time. They will give it as an exercise, as a warm up, and they will even give it to beginner students. This is a main reason why so many guitar students get stuck soon after beginning to play, and find they cannot make progress.
The chromatc scale is extremely difficult to do correctly, without building in bad habits. No beginner can do this. Oh, it seems to make sense, after all, the chromatic scale uses each finger in turn, one fret to another.
But, If you have not built the sensations of the light finger and firm finger, if you have not elimated sympathetic tension from the fingers so that as one finger plays, the others don’t tense and move away from the strings, you will struggle, and never reach your true potential. Your chromatic scale will be sloppy and break down at high speeds, and your foundation for continuous improvement on guitar will be severely weakened.
I took a look online to see how this scale was being taught, and it was rather frightening! The first two videos I found are good illustrations of why so many people have trouble learning guitar or getting better. If you follow the example of these teachers, you will have lots of problems. Let’s take a look..
NOTE: For anyone who mistakenly believes I am saying this is the ONLY positioning of the fingers needed on guitar, please see this lesson on "The 2 Necessary Left Hand Positions On Guitar"