Complex sentence: He represented bodies as architectural forms, reducing the figure to a rhythmic play between convex, concave and flat surfaces, and he was fascinated in every movement the body could make, trying to capture it in his work.
Split into simpler sentences: He represented bodies as architectural forms, reducing the figure to a rhythmic play between convex, concave and flat surfaces. And not just of its form, he was fascinated in every movement the body could make, trying to capture it in his work.