Watch the Power Chords: Level 1 online guitar lesson by Chris Buono from Guitar Gym: Power Chord Workouts
In workout #2 we're going to slightly add to the first workout. Notice in bars 2 and 3 there are I position F5 and VIII position C5 power chords respectively in-between the A5 and G5 played in workout #1. Again, the key here is to play all the chords clearly and keep the pressure applied to each grip as steady and consistently as you can. Visualizing the next chord becomes even more important given the bigger jump fret-wise going from, for instance, the F5 all the way up to the C5!