Erin Oprea on Instagram: "INNER THIGH BLAST!! You’ll hate me now, but love me later!!!!!! This is a little clip out of one of the days on my PRETTY MUSCLES APP, (which has a 7 day free trial, so it’s time to join our family!) and I have workout plans for all levels of fitness and tell you exactly what to do daily! -30 sec lateral lunge right -30 sec lateral lunge pulse right -30 sec lateral lunge hold low right🔥🔥🔥🔥 That leg is going to feel so good. Now repeat this on the left leg!! If…