Is P90X effective for people who are naturally skinny?

P90X can be effective for people who are naturally skinny, as long as they tailor their nutrition and fitness goals accordingly. The program is designed to increase muscle strength, endurance, and flexibility through its variety of high-intensity workouts, which can help those with a naturally slim build to build lean muscle mass and improve their overall physique. However, to gain muscle, skinny individuals need to ensure they are consuming sufficient calories and proteins to support muscle growth in conjunction with the rigorous exercise regimen. By adhering to a well-structured nutritional plan that focuses on a caloric surplus while engaging in P90X, even those who are naturally skinny can see significant improvements in muscle definition and strength.