Please choose the correct ending to complete the given sentence: Health: [header] How to boost immunity with exercise [title] See your doctor. [step] Almost any person can boost immunity through exercise. However, what exercises and times are best for you may vary depending on your overall health.

Ending1: Schedule an appointment with your doctor to see you are able to do a moderate exercise program to stimulate your immune system. This can ensure you are healthy enough for exercise, especially if you aren't currently exercising. Ending2: Call your doctor before starting any exercise regimen to check for specific recommendations or guidelines. Be sure to get this information before you begin any one-on-one activities so you don't put unnecessary stress on yourself. Ending3: Talk to your doctor about starting a exercise regime for yourself, and discuss which exercises and times fit into your schedule. [substeps] Your doctor will want to see your physical and mental health so that he/she can make sure that your body is healthier. Ending4: Speak to your doctor about which exercises are beneficial for you and consider ways to increase your immunity. [substeps] Periodically check your calorie profile to determine the recommended amounts.

Answer format: ending1/ending2/ending3/ending4