Best position for play Power Chords standing

Question

I usually play standing and the guitar body is somewhere around my belt. For power chords, I use the index finger and pinky, but some chords I play with the ring one.

In every tutorial, teachers show power chords this way:

But I just can't play this way standing: I feel no control if the neck doesn't lay on my palm or pinky finger. I like moving a lot while playing. There're two positions is ok for me, but I don't know is they ok and which is better:

1. It allows me to keep the wrist straight. Thumb over the neck. The neck lays on palm - imgur-link-1
2. The wrist is bend. The thumb is above the neck. The neck lays on the pinky finger - imgur-link-2

I like my wrist to be straight and I like when the neck lays on the palm or pinky finger. Should I avoid this contact? I fell that this allows me to control the guitar better while jumping around with it.

Also: Is it ok to mute A and top E strings with my middle finger simultaneously while I’m playing F5 chord? Or should I better mute A string with the middle finger and E string with my thumb(guess it depends on the thumb position)?

I apologize for my bad English.

Answer 1

If you have the guitar high like Steve Howe that should not be a problem. But a lot of rock guitarists put the guitar low, like Jimmy Page. If you have the guitar this low proper hand posture is impossible. You could try angling the guitar so the head of the neck comes up to your chest level. This might allow you to play power chords in the lower positions the way you want.

Answer 2

Have you tried first, playing the power chords whilst sitting down, and if it makes a difference? I recommend using a strap on your guitar, even if you're sitting down as it positions your guitar well (and secures it too!).

Also as with learning any new chords, practice over time, can help. Keep trying to adjust your hand as you play, over time, you will learn which position suits best.