Even if you have a health condition that causes fatigue, avocado is worth trying if you have been hesitant.
In order to cope with myositis, it is recommended that you incorporate more monounsaturated fats and omega-3-rich foods into your diet. The Hospital for Special Surgery (HSS) explains that patients with myositis may experience fatigue. Avocados fit into both categories. In spite of this, avocados can still be incorporated into your daily life in other ways if you don't enjoy eating guacamole every day. If you normally like mayonnaise, try substituting avocado on your chicken sandwich.
You can get energy from your food by eating avocados, which are also a good source of B vitamins (via WebMD). However, avocados have also been found to be high in potassium (according to Harvard), a nutrient that can cause hyperkalemia in people with kidney problems in large quantities.