
Sophie van Oostenbrugge is a Fitness Trainer and Health Advocate.
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Sophie van Oostenbrugge, known online as GAINSBYBRAINS, is a fitness trainer and content creator specializing in workout demonstrations, health and wellness habits, and diet strategies for muscle building. She shares detailed fitness routines, promotes her fitness app, and engages her audience with motivational content and personal fitness milestones. Her content spans platforms like Instagram, TikTok, and YouTube, focusing on glute, core, and back workouts, often incorporating low-volume, high-frequency training methods.
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