Chris, you'll be getting twinges for a bit, especially as you ramp up your activities.
I had twinges until about a year past my second (about 15 months), but much fewer as time passed. One thing that I tried to do was to mix my training activities.
I mixed in soccer (or early on soccer like activities), martial arts (see soccer), continuing PT exercises, weights, pilates, and later on yoga. Walking and hiking, cycling, etc.
I still had twinges and one setback, a sciatica like pain for three weeks at nine months intermittently as I extended my right leg while walking up an incline. It prompted several calls to my surgeon's office and some internal anxiety. Then it stopped and never darkened my days again.
I attribute it to scar tissue that was letting go due to my increasing martial arts kick workout.
Remember that your body is not only recovering from the surgery, but also from muscle atrophy or over development due to the arthritis. It will take time for it to recover from that long term insult.
You may get muscle pulls from stressing long inactive muscles while those around them are more than happy to soldier on.