Bonjour,
Une proposition.
Public Sub InsertRowsAndvalues()
Dim tbl, arr(), i As Long, k As Long
tbl = ActiveSheet.Cells(1).CurrentRegion.Value
ReDim arr(UBound(tbl) * 2)
For i = LBound(tbl) To UBound(tbl)
arr(k) = tbl(i, 1)
arr(k + 1) = tbl(i, 1)
k = k + 2
Next i
ActiveSheet.Cells(1).Resize(k).Value = Application.Transpose(arr)
End Sub