hers or during daylight hours.While it is possible to train only your chest and back, it is generally not recommended to focus solely on specific muscle groups in your training. Instead, it's important to have a balanced workout routine that includes exercises for all major muscle groups in your body, including your legs, arms, shoulders, and core.


Focusing solely on your chest and back could lead to muscle imbalances and may not be an effective way to address your concerns about having a smaller chest due to pectus. To build a larger and more defined chest, it's important to incorporate exercises that target your chest muscles, such as push-ups, bench press, dumbbell flyes, and chest dips, along with exercises for other muscle groups.


In addition to strength training, incorporating cardio and a healthy diet can also help promote overall muscle growth and a more balanced physique. It's also important to consult with a fitness professional or healthcare provider to ensure that your workout routine is safe and effective for your specific needs and goals.