Now you can evaluate the difference between how much care is needed and how much care you can realistically provide. You need to find a balance of providing quality care without harming your own health. There is likely mismatch, which is why you're feeling so burned out.
There are two main types of activities that need to be met in order to provide a thorough and complete caregiving routine. Activities of Daily Living (commonly known as ADLs) are necessary for physical and emotional well-being. These are activities like self feeding, functional mobility, dressing, bathing and personal hygiene.
Instrumental Activities of Daily Living (commonly known as IADLs) are activities that are required for independent functioning but not necessarily fundamental. IADLs most often refer to activities such as cleaning, shopping, managing money and preparing meals.
ADLs are most time consuming and may require professional help or investing in proper equipment that will make these tasks easier for your parents. IADLs are more often tasks that you can help out with along with other family members or a professional caregiver.