Why does my stomach hurt after swimming?

Overuse Can Cause Abdominal Muscle Tension

Abdominal muscle tension from an overuse injury is another cause of stomach pain after swimming, according to Strength Lab LDN, a personal training studio based in London. Overuse injuries are common in swimming because they consist of repetitive movements that use the same muscles over and over again.

There’s a greater risk of injury if your internal muscles (the deep muscles of the abdomen and back that stabilize the spine) are weak, explains the Canadian Academy of Manual and Musculoskeletal Physiotherapists (CAMPT). This may be the case if you are new to swimming or returning after a long absence.

According to research, symptoms of abdominal tension include:

• Muscle pain and swelling
• Reduced muscle movement or stiffness
• Bruising or discoloration of the skin

If you experience this kind of stomach pain after swimming, you should rest to allow your strained muscles to recover. Apply cold compresses soon after the injury to reduce inflammation, and consider using a bandage or compression garment to reduce bruising and aid muscle recovery. Once the inflammation subsides, a heating pad or other warm compress may be helpful, says the Cleveland Clinic. Heat therapy increases blood flow and relaxes stiff muscles, helping to relieve pain.

If you experience significant pain, bruising, or a visible bulge when you contract the muscle, you may need imaging. An ultrasound, CT scan, or MRI can help your doctor determine the extent of the injury and formulate a treatment plan. Physical therapy or surgery may be warranted if the injury is more serious.

If a weak core contributed to a muscle injury, you can work on strengthening your abs and core once you’ve recovered. A strong core will make you less prone to swimming-related injuries, says the Mayo Clinic. Your core helps stabilize your body position in the water while adding power to your movements, according to Oregon-based Evolve Physical Therapy. This contributes to improved technique and more efficient movement, in addition to preventing injuries.