#1
Simple question and hopefully one with a simple answer.

Let's say I'm playing an F#5 power chord (24xxxx) and sliding it a G5 power chord (35xxxx) and then back to the F#. My thumb is positioned at the back of the neck. Should my thumb slide with the chords or stay in place? Or does it not matter? I'm mainly worried about speed.

Quick tab of the slide I mean:

|-------------------------------------|
|-------------------------------------|
|-------------------------------------|
|-------------------------------------|
|-----------4/5\4---------------------|
|-----------2/3\2---------------------|
#4
For that exact slide my thumb actually stays stationary but it's at least a little important to be able to slide large distances quickly and for that your thumb will have to move with your hand.

I don't think it really matters for tiny things like that but you need to be able to release the thumb enough to slide a long way because in other contexts you might need that ability.
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#5
For that distance, my thumb tends to stay stationary, all though I really don't think that it mattes very much. If it was anything larger, I generally move my thumb with the rest of my hand. But that's just me.
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#6
I would not move the thumb, I turn it as the hand moves and it stays stationary(the point where it touches the back of the neck) it is natural to turn it to accomodate the new position. If I move it, it feels awkward for me. Also, as you require to slide it back, the thumb is already in position and you can use it to move back to the F# and have some leverage to 'pull' your hand back in position.
#7
Its funny when i actually "think" about what my thumb should do it starts feeling weird. Like saying a single word over and over its starts sounding weird and different. I guess my advice is to try not to think about your thumb and just make sure your hand is comfortable and play as fast and relaxed as you can.
#8
i would probably move my thumb, but other than that I'm with zaphod. it doesn't hurt to be able to do it either way.
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#9
I'd anchor the thumb and use the wrist to slide the powerchords so I'd have to expend less energy.
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#10
Generally with any such slide I move my thumb, chords or individual notes, especially for quick Guthrie Govan/Greg Howe type slides, whether it's a semitone apart or a larger interval. Do what's comfortable for you though, whatever works for you is correct.
#11
Quote by mabbamam
Its funny when i actually "think" about what my thumb should do it starts feeling weird. Like saying a single word over and over its starts sounding weird and different. I guess my advice is to try not to think about your thumb and just make sure your hand is comfortable and play as fast and relaxed as you can.

This for me too,I don't tend to think about what my thumb should be doing,It just follows my fingers.