Cheerful Comic Gym Heroine in Action

A cheerful white girl in a gym, illustrated in bold comic-book style with thick black outlines and vibrant colors. She wears a neon pink sports bra, electric yellow leggings, white sneakers, and a sporty headband. Pose is dynamic and heroic: one arm flexed, lifting dumbbells with a bright smile, surrounded by energetic action lines and a POW-like aura. The background features gym equipment such as treadmills, a rack of dumbbells, and a punching bag. Use high-contrast lighting, vivid halftone dots, and crisp shading. Color palette dominated by electric blues, hot pinks, and sunny yellows to capture a fun superhero vibe.