If your professional agenda already seems to be full, there’s no need to load it up any more. This is counterproductive in the long run. You will no longer have the ability to do critical tasks of quality and this will quickly become detrimental to you.
Your physical, then mental, then emotional energy will drain away as you accumulate responsibilities and tasks. Like a pressure cooker, the internal pressure will rise inexorably and then….
Work overload must be analyzed and can be remedied by several possible means. As a leader you often have a direct or indirect team at your disposal that could perhaps help you.
After analyzing your agenda over the last weeks and months, you should be critical and focus again on the added value you need to bring to your role and function.