There is no need to worry, as beet consumption causes pink discoloration of urine and stool. Abdominal discomfort might be due to excessive muscle strain during strenuous exercise. Advice 1. Continue taking beet 2. Continue exercise but try to avoid it vigorously. You can take rest for few days and resume it later. Start with a balanced mix of cardio, weight training and flexibility exercises 3. Take natural high protein like egg, soya bean, pulses, meat, and milk. Choose food with nutritional calories like potato, banana and dry fruits 4. Drink 3 – 4 liters of water daily 5. Chew the food properly to make it easily digestible 6. Avoid excess intake tea and coffee after meal as they contain tannin which hinders absorption of minerals like iron If abdominal discomfort is not relieved after few days of rest then you can get an ultrasound of whole abdomen. I hope this information will help you. I will be happy if you ask another question Thank