Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to carbo load [title] Talk with your doctor before starting if you have a preexisting condition. [step] As with any exercise or diet plan, it's a good idea to run it by your doctor before beginning. This is especially true if you have a medical issue, such as diabetes.

Ending1: [substeps] Preexisting conditions such as palliative disorders, low blood sugar, suicidal thoughts, or strokes are common medical conditions that often need to be monitored closely by your doctor. Talk to your doctor about whether or not you may be experiencing symptoms that could indicate a medical issue. Ending2: [substeps] Preexisting health conditions can come on very suddenly. Understanding your condition first will help you manage it if it persists. Ending3: People with diabetes usually have trouble with major changes to their carb intake and blood sugar levels. [title] Increase your carb intake 3-4 days before the event. Ending4: [title] Purchase a carb-free choice. [step] It's important to buy low-carb options before beginning your plan, as they can control the fat content of your foods.

Answer format: ending1/ending2/ending3/ending4