Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to avoid potentially hazardous exercises [title] Talk to your doctor. [step] Even if you think you're perfectly healthy, talking to your doctor is essential before you start an exercise routine. Make an appointment or talk on the phone to review your exercise plan with your physician.

Ending1: [substeps] Getting a medical clearance from your doctor may seem silly or unnecessary. However, your doctor knows you and your health best and will be a great asset when trying to stay active. Ending2: Ask any questions you have about whether exercise might contribute to weight issues. Your doctor can check the length and variety of exercises needed to maintain a healthy weight. Ending3: [substeps] Never start a vigorous exercise regimen for 10 days after you begin losing weight. If you feel you've slowed down in your diet and want to improve your breathing patterns, talk to your doctor about other lifestyle adjustments you may need to make. Ending4: Let them know if you feel it's safe and appropriate for you. [substeps] You should also discuss with your doctor any accidents you've had with running, skateboarding, or just performing an activity incorrectly.

Answer format: ending1/ending2/ending3/ending4