They setarted rowing when they were 14 years old. they were doing rowing since.
Rowing as a sport has been traced back to Ancient Egypt, so it could have been around for 5000 years. For the purpose of transportation, rowing has likely been around longer than that.
so long his arms fell off
since 1896. The first Olympics
Depending on what are you doing on a rowing practice, but certanly A LOT!
They have participated in the 2004 and 2008 Olympics
Rowing has been an Olympic event since the 1900 Summer Games in Paris.
They have been doing it for quite awhile
Please note this: "would" is the past tense of "will," while "could" is the past tense of "can." And as you may know, something that CAN happen may not necessarily happen. However something that WILL happen, actually WILL occur. So, if you know that an antecedent WILL result in a specific consequent, then the antecedent WOULD HAVE resulted in the consequent, for example: "My employer told me that if I missed one more day of work I will be fired. So if I would have missed yesterday of work as you wanted me to, I probably would have been fired." "If you miss more than three days of work you can get fired. My boss could have fired me on the spot but he didn't: I had a legitimate excuse."
Generally a long narrow rowing boat (varying from 1 to 8 persons) is refered to as a "rowing shell" or simply "a shell"