Originally Posted by liolio
I also make progress an area I focus on lately is to keep the hips flexors (especially the rectus femoris) relaxed. It applies to all strokes when you kick but it is particularly relevant to fly.
Thanks for the tip, liolio. I noticed I had too much hip bend after the dive, where I could easily see my feet low in the water, so I remembered your post and deliberately relaxed the hips, keeping the legs higher.
I only do 10-15mins of butterfly at the end of my swims.