One thing that took me awhile to figure out...when recording, viewing in real time, and playing back, remember it's going to take time to get an authentic voice established. Practice, practice, practice, but don't beat yourself up if you can't stay at 220ish for the entire sentence. Natural voice fluctuations can be 50+/- hz, so if you can reach 220 "sometimes" this means you'll also be hitting 170 "sometimes."
And that's ok. Keep practicing, and as your "sometimes" high end becomes 230, 240, etc that also means your low end will also be increasing to 180, 190, etc.
When I was doing voice training I tried to keep my vooce at 220...very monotone! LOL! My voice therapist pointed out that voices go up and down during speaking, but I had developed a sort of "target fixation" on The Magic Frequency and lost sight of the goal...problem is once I let go of the frequency fixation, the inability to quickly raise my overall freq range caused a depression which I'm just now getting out of.