You have dark urine and your muscles are sore
This is not good and you should see a doctor asap! It could be a sign of rhabdomyolysis. Although it is rare, it life-threatening condition if it isn’t treated right away. So be sure you double check with a doctor because it has been found in people who perform intense conditioning workouts. This condition is caused when the body breaks down muscles and releases myoglobin and creatine kinase into the blood stream, which leads to kidney damage.