Given an ectomorph's faster recovery profile, what specific minimum weekly training frequency per major muscle group is typically recommended to optimize the cumulative hypertrophic stimulus?

An ectomorph is a somatotype characterized by a naturally lean build, slender bone structure, and typically a faster metabolism. This metabolic profile contributes to a faster recovery rate from physical exertion, meaning their muscles repair and adapt more quickly between training sessions compared to individuals with slower recovery profiles. Hypertrophy refers to the increase in the size of individual muscle cells, leading to overall muscle growth. To achieve this, resistance training provides a mechanical stimulus that initiates muscle protein synthesis, known as MPS, which is the biological process by which muscle fibers repair and grow larger. This MPS response is significantly elevated for approximately 24 to 48 hours following an effective resistance training session in trained individuals. To optimize the cumulative hypertrophic stimulus, it is essential to re-stimulate MPS once the preceding elevation has subsided and the muscle has sufficiently recovered from the previous session, without initiating a new session too early and impeding the recovery process. For an ectomorph's faster recovery profile, the specific minimum weekly training frequency per major muscle group recommended to optimize the cumulative hypertrophic stimulus is two times per week. This frequency ensures that each major muscle group, such as the chest, back, or quadriceps, is targeted often enough to repeatedly elevate MPS and accumulate sufficient growth signals throughout the week, thereby maximizing the hypertrophic response without leading to overtraining.