AER on Newbury is a boutique personal training business in Boston focused on private, one-on-one coaching. Its approach centers on individualized programming tailored to each client’s goals, current ability, and long-term development. Training is guided by an evidence-based philosophy that emphasizes form, progression, and measurable improvement, whether clients are building a foundation or pursuing more advanced performance goals. In a private setting designed for focused work, the business prioritizes purposeful, structured coaching that supports lasting gains in strength, consistency, and confidence. Hyeyun Min Peter is noted for knowledge and dependability, reinforcing the studio’s emphasis on trust, thoughtful guidance, and sustained progress over time.