“The only thing I could add might be to watch how much pressure/hand strain you are working with when you dig with the trowel. Again, see if there might be a way to get power from your trunk/core body that you can transfer to your hand via shoulders and arms, rather than making the poor little ‘ole hand muscle through all that work. Think of the wrist as an unbroken extension of the arm – try not to work with it bent in any way.”

Hope this helps!