I've been playing for years now as a hobby guitarist, but my fretting hand strength plateaued - it never really improved much beyond what I could do 2 months after I started playing.
Since then, I'm at the point, where playing a full F chord
is easy enough. Also, I don't have too much strength problems playing an electric guitar. On my classic guitar, however, I still can't play many pieces as fluently as I'd like to, because the strength of my fretting hand is barely enough make the notes ring cleanly. Especially, when I play classical or jazzy pieces with barré progressions and a melody over it, e.g. like this (not showing the melody here)
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, my hand is near exhaustion all the time - no pain, but it doesn't feel easy and fluent at all. (I'm already trying to apply just as much pressure as required, but I'm not sure, if I'm still applying too much while I'm concentrated on playing the piece.)
I never had a teacher, but I did have phases where I tried to practice barré chords and left hand strength a lot. I also got a GripMaster (medium tension) finger trainer, but all it ever did was exhausting my hand, I was never able to build up any strength with it - but maybe I was doing something wrong (wrong exercises)?
Do you have any good tips on what I could do to significantly strengthen my left hand?