Task: Question Answering
Input (English): My thumb is still sore from working my TV remote overtime last night , and from a tennis game with my son . After watching the Red Sox score 10 runs in last night's 1st inning , I decided that it was time to do something else because the suspense of the outcome of last night's game was gone , ( or at least I thought so ) , and so I would record the Olympics to later watch the Women's gymnastics . So , my youngest son and I headed to the local tennis court - rain ? We weren't going to let wet courts stop us from playing a couple of sets under the lights . 
Question: What's a possible reason the writer's thumb is sore from working the TV remote ?
Output (English): Because they have been watching a lot of TV .