My baby finger has not become relaxed enough due to wrong technique in tennis, too much stress on it and more here. The only moment I can feel the toughness is when I am totally relaxed like after sleeping so it does not limit my activities at all but I don't want to get it bad neither so important to learn to get it more relaxed. So
How can I improve baby finger's extension and flexion? How to relax it and how to stretch it?
Hand's 2-5 fingers flexion/extension
According to this, normal ROM values are 85-105 degrees for the flexion and 20-30 degrees for the extension. In contrast, my ROM values are 85 for the flexion and 70 degrees for the extension.