Please choose the correct ending to complete the given sentence: Health: [header] How to diagnose mitochondrial disease [title] Notice muscle weakness. [step] Your muscles may feel tired and weak after minimal activity. You may struggle to pick up items or maintain your balance.

Ending1: Or you may hit a tree or obstacles and suddenly start to feel faint. Find out where your muscles feel sore and store them for later. Ending2: As a result, there may be muscle weakness that makes it difficult to even pick up all things. You may do things like : [substeps] Lifting heavy objects. Ending3: Additionally, you may feel tired easily, especially after any kind of physical activity. [substeps] Muscle cramps are usually not a symptom of mitochondrial disease, but they can sometimes accompany muscle weakness. Ending4: Make your way to a doctor's office or emergency room to examine yourself. [substeps] If it is not obvious, you may have mitochondrial arthritis.

Answer format: ending1/ending2/ending3/ending4