I am a runner who has extremely restless legs at night?

Try few things. Several prior answers will cover many ? About rls. For a runner, few more suggestions: adequate water, potassium/mineral intake is crucial. Drink what u think is adequate (gatorade, water, fruit juices), then double it! take hot shower soon after cool down period. If something hurts, ice it for 10 minutes. Stretch, stretch, stretch muscles, esp leg mm, and learn proper stretching.