Please choose the correct ending to complete the given sentence: Health: [header] How to tell if your metabolism is slowing [title] Look at your feet. [step] It may seem strange, but the condition of your feet is one way to determine whether you have a low metabolism. Dry feet and cracked heels indicate slow metabolism because dry skin is one of the symptoms that your thyroid hormones are out of balance.

Ending1: [substeps] Feel your feet for stiffness after you get out of bed each day. If you feel cold, otherwise have them checked out by a doctor or ask if they are getting creaky or sore in the morning. Ending2: [substeps] If you've eliminated other potential causes of cracking or peeling skin on your feet, such as athlete's foot or nail fungus, your slowing metabolism may be to blame. Dry skin elsewhere, as well as dry or thinning hair, also may indicate a slow metabolism. Ending3: This can help you determine whether your body is slowing your metabolism if you lose weight and your metabolism has dropped to a low level. [substeps] Many hikers observe that their feet go from extremely high to very low speed and then drop back to the high speed without announcing this. Ending4: [substeps] Not only are you getting calluses on your feet, but your feet are picking up bacteria from other body animals. Your feet, if left untreated, can lead to diabetes.

Answer format: ending1/ending2/ending3/ending4