Nearly done

void setup()
{
  // put your setup code here, to run once:
  Serial.begin(9600);
  int Swimhours;
  int Swimminutes;
  int Swimseconds;
  int Bikehours;
  int Bikeminutes;
  int Bikeseconds;
  int Runhours;
  int Runminutes;
  int Runseconds;
  int STs;
  int BTs;
  int RTs;
  int Th;
  int Tm;
  int Ts;
  int Overallseconds[3] = { STs, BTs,  RTs};
  int Totaltime[3] = {Th, Tm, Ts};
}

OK, I give up. Please explain why you are still declaring these variables in setup() ?