Experiencing side pain while running is a common concern for many runners, from beginners to seasoned athletes. Often referred to as a 'side stitch' or exercise-related transient abdominal pain, this discomfort typically occurs along the lower edge of the ribcage. Doctor Mike emphasizes that side pain can result from a variety of factors including respiratory issues, muscle strain, dehydration, or eating habits before exercise. One major reason behind such pain is the stress placed on the diaphragm — the primary muscle involved in breathing. When running, rapid and shallow breathing can irritate or spasm the diaphragm, leading to a sharp or dull pain in the side. Additionally, insufficient warm-up, poor posture, or compromised core strength may increase susceptibility. To help alleviate side pain, it’s recommended to focus on controlled, deep breathing techniques to ensure the diaphragm receives enough oxygen without overexertion. Proper hydration and allowing ample time between meals and running are essential; heavy meals or sugary drinks shortly before exercise can exacerbate discomfort. Strengthening core muscles through targeted exercises can increase support for internal organs and reduce strain on the diaphragm. If side pain persists or worsens, it’s important to seek medical evaluation to rule out other causes such as gallbladder, liver, or kidney issues. Doctor Mike also advises gradually increasing running intensity and duration to allow the body to adapt effectively. Incorporating these strategies can make running more enjoyable and reduce the chances of side stitch pain interrupting your workout. Remember, listening to your body and addressing discomfort proactively is key to long-term fitness success.