Did "corrective exercises" at the gym, mostly core but also some stretch band exercises for the shoulder and hips.
Prone cobra, leg lifts, diamond leg hold, crossover crunches, back extensions on a Swiss ball, half-vees, and one or two others.
In the evening I carried a 45-lb pack a few miles, then up and down a steep grade right at the end. Felt good carrying the pack, the Paradox fits me very well.
