The video explores the phenomenon of muscle memory, emphasizing its significant impact on regaining muscle mass and strength after a break from training. It uses the example of an individual named Kamal, who, despite taking time away from the gym, was able to quickly regain his physique. This is attributed not only to genetics but also to the concept of muscle memory, which allows for rapid recovery of muscle size and strength. The speaker argues that while genetics play a role, muscle memory is a powerful factor that can make it seem almost unfair to those who believe constant training is necessary to maintain gains. The video suggests that even after a six-month break, where one might appear smaller, the body can quickly return to its previous size within months, not years, if the individual resumes training.