This exercise challenges your left hand with an uneven accent pattern. In each four-note group, the accent placement alternates - first group has accents on notes 1 and 4, second group has an accent on note 3, then the pattern repeats.
Note: If your weak hand is your right hand, perform this exercise with the right hand instead.
Start slow and focus on:
Start at around 40 BPM and increase speed only when you can maintain clear accents and even spacing. This pattern requires focus and patience to get right.