Athletic shoulders and a narrow lower body give your silhouette a lovely heart shaped look.
Your style goal is to add volume to your lower half, using clever tailoring to balance your wide upper body with your narrow lower body.
With tops, V-necks or soft, draped necklines help soften a strong frame, creating softer lines. Look for loose, feminine sleeves rather than form fitting ones.
With trousers, go for long, loose palazzo styles over skin tight styles. It might go against the grain, but your goal is to look for styles that make your lower body look bigger (yes really).
Embrace embellishment when it comes to dressing your lower half but keep it minimal above the waistline. Darker colours above and brighter below help create a more balanced look.