When playing the guitar, how to press the left thumb?

Depending on the direction of the head when holding the piano. The principle is that when holding the piano normally, the wrist is neither too prominent nor too sunken, and the forearm naturally droops. Adjust the position properly when changing the fingerboard.

Basically, when playing melody, don't touch your neck with your palm, and your thumb is behind your neck, not too much. An exaggerated grip is only needed when the thumb presses the string.

The most common left thumb is 6 strings 1 and 2. If the left hand presses the string at the high grip position, the left thumb can also press the string at the high level of 6 strings. Whether in the high grip or the low grip, the method of pressing strings with the left thumb is the same.

Extended data

Fast guitar playing practice

1, exercise with your right hand for three minutes.

Practice in different parts. Play a series of octaves for three minutes at a comfortable speed with a lower plucked string. Then, at the same speed, switch to playing the eighth note with alternating strings for three minutes. These two three-minute exercises will help you strengthen your muscle endurance and sense of rhythm, and also build your muscle memory.

2. Practice with both hands synchronously

It is common to use this common basic exercise to train the synchronization and coordination of hands, but it is very important to practice correctly and continuously (basically climbing the grid)

The ultimate goal is to be able to completely synchronize the movements of both hands between each note and across the strings, practice with the metronome, and slow down to achieve a completely error-free speed.