I'm also transitioning. I'm currently at 8 months. Right now I have braids, but prior to getting them, at 6 months post, I worked out 6 days/wk and it was pretty tough. My hair is just at shoulder length so my relaxed ponytail would be fine, but those edges boy
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I finally went to H&M and bought one of those $2 headbands, in black. I started to wear it when I worked out. It kept the sweat from my face and it tames the beast for the duration of the workout. It's one of the stretchy cotton headbands that I'm sure you can get from anywhere. HTH!