Watch the Fretting Hand online guitar lesson by Brad Carlton from Blues Bass
Your fretting hand needs to be efficient and strong in order to be able to sustain the constant stream of notes that occur when you're playing the bass. You don't get to bail out and rest when you're a bass player. This lesson will teach you proper hand position to assist you in playing different kinds of bass lines.
You will learn a more relaxed posture utilizing the first and fourth fingers for a three fret span which is especially effective for root-fifth-octave formations. You will also learn a strict one finger per fret approach which allows you to have access to 16 notes in any given position.
It is wise to begin this technique in the higher frets which are closer together and then gradually work your way down the neck as your hand becomes more flexible. A very important secret is to utilize the length of your first finger when you need to execute bigger stretches.