Guitar runs can be played with a variety of techniques, including alternate picking, sweep picking, and economy picking. Alternate picking is the most common technique and involves picking the strings with alternating downstrokes and upstrokes. Sweep picking is a more advanced technique that involves picking all the strings in a row with a single stroke. Economy picking is a technique that uses a combination of alternate picking and sweep picking to minimize the number of strokes needed to play a passage.
Guitar runs can be challenging to play, but they can also be very rewarding. They can add a sense of excitement and virtuosity to a song, and can help to showcase a guitarist's skill and technique.