I'm playing classical guitar, with 5 hours of practice a day.
Recently I've been practicing some etudes with some "crazy" chords.
The problem is that after some days of practice, my fretting hand gets so tired that I ain't able to practice properly, the only solution I found is rest some days and then practice again.
Other than changing string tension, someone knows another solution??
Stretch your arms and hands very thoroughly before you play, and warm up with easier stuff. Don't just jump straight into complicated, stretched chords immediately when you pick up the guitar.