def ride_efforts(id)
      result = call("rides/#{id}/efforts", "efforts", {})
    
      result["efforts"].collect {|effort| Effort.new(self, effort)}
    end
def ride_efforts(id)
      result = call("rides/#{id}/efforts", "efforts", {})
    
      result["efforts"].collect {|effort| Effort.new(self, effort)}
    end
returns all efforts, don't need an offset