Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to gain weight and muscle [title] Meet with a doctor. [step] Before you begin a new workout regimen or try a drastically different diet, you need to meet with a doctor to discuss your health. [substeps] Talk to her about why you want to gain weight and muscle mass, and tell her about the kinds of things you're going to change in your lifestyle.

Ending1: When you find a doctor, stay calm and be honest with her about what changes you want to make in your lifestyle. It's important to understand that gaining muscle mass is normal and the doctor will understand why you want to gain it. Ending2: She may be able to help you figure out what styles of weight training are right for you, or can suggest a specialty. Also, be open about exercise and diet as well as personal health. Ending3: Ask your physician what a safe amount of weight gain is for your age and gender. Gaining too much weight could put your body weight into an overweight category. Ending4: She may be able to suggest changes to your diet that don't threaten your health, but still relevant to your weight loss goals. Ask your doctor if lifting weights or gaining weight helpful to you.

Answer format: ending1/ending2/ending3/ending4