
One of the most important aspects of guitar playing is to have sufficient power in your left hand to be able to play chords, arpeggios, scales, licks, etc. at a steady beat without getting tired. The three most important aspects of the left hand, in this context, are power, flexibility and agility.
As a guitarist you have to work relentlessly to accomplish the three, with power being the most important of the three. Still flexibility should not be ignored in this context since it plays a vital role in building power with agility. Agility is a kind of byproduct of building power and flexibility but should not be only treated as such, endless rhythmic exercises will in the end build the agility needed to become a fluent player. This article mainly covers the power aspect.