Dr Carlos Henríquez-Olguín, an up and coming rising star exercise metabolism researcher, discusses challenges in mechanistic exercise research in Chile and his groundbreaking work on reactive oxygen species (ROS) and exercise. He explores the role of ROS in muscle contraction, the effects of chronic versus acute increases in ROS, and the theory of ROS and aging. He also talks about language challenges, giving visibility to early career researchers, and challenges faced by researchers from less scientifically recognized countries in publishing their work.