Felt something pop when you were doing lunges?

If you felt something pop while doing lunges, it could indicate a muscle strain, ligament injury, or a joint issue, such as a cartilage tear. It's essential to stop exercising immediately and assess the pain and swelling. Applying ice and resting the affected area can help, but if the pain persists or worsens, it's advisable to consult a healthcare professional for a proper diagnosis and treatment.