Fitness fanatic with sore muscles diagnosed with deadly condition

A 41-year-old fitness enthusiast rushed to the doctor after her sore muscles and 'cola'-coloured pee became unbearable. Gemma Underwood was then diagnosed with rhabdomyolysis - a condition where damaged skeletal muscle tissue breaks down rapidly, releasing its contents into the bloodstream. According to experts, the condition can be life-threatening and needs immediate hydration.