Dear Gej, hello Giving suddenly your muscles some extra work to do, can result in muscle fatigue and muscle soreness. Since you are an average runner and you ran more on one day can result in muscle pain. I think you should give rest to your muscles, so avoid biking also for few days. Pain can be relieved by rest, hot fomentation and taking pain killers with muscle relaxant under medical supervision. You can apply locally on calf muscles, some pain relieving gel for relief. I hope this is helpful to you. Thanks.