Does your diaphragm get sore from sit-ups?

Yes, your diaphragm can become sore from sit-ups, especially if you're not used to the exercise or if you're using improper breathing techniques. During sit-ups, the diaphragm works to help stabilize your core and support your breathing, which can lead to muscle fatigue and soreness. It's important to maintain proper form and breathe correctly to minimize discomfort. If soreness persists, consider adjusting your routine or consulting a fitness professional.