Selecting a weight that can be controlled throughout the entire ROM, in strict form; barely being able to complete four repetitions with absolutely no forced repetitions describes which training principle?

The concept being described focuses on choosing a weight that allows for strict form and only a limited number of repetitions. This training methodology aligns with the overload principle, which states that to increase muscle strength and size, the resistance must be greater than what the muscles are accustomed to handling. By selecting a weight that can only be managed for a minimal number of repetitions while maintaining strict form, you ensure that the muscles are being sufficiently challenged, thereby promoting adaptation and growth.

Using a weight that can only complete four repetitions without additional support signifies that the load exceeds the muscle's current capacity, making it an effective application of the overload principle. Such a strategy is key in resistance training to stimulate muscle fibers to develop strength and endurance, illustrating an essential aspect of progressive training protocols.