Please choose the correct ending to complete the given sentence: Health: [header] How to prevent aging knees [title] Wear knee pads. [step] If you are doing an activity that could cause you to injure your knees, such as a sport that could make you fall, then you should protect them before that happens. Wear knee pads whenever you are doing an activity that may involve a fall or pressure on your knees.

Ending1: [substeps] Wear socks when doing a sport that can cause knee pain or discomfort. Protect your knees from where you're falling by wearing protective pants and putting padding under them. Ending2: [substeps] For example, volleyball players should use knee pads to protect their knees when they fall or dive for the ball. Knee pads can be useful for activities beyond sports. Ending3: [title] Make sure to get plenty of rest and manage your pain. [step] You should not simply give up sleeping as easily due to pain. Ending4: [substeps] Purchase or order knee pads at your local drugstore. There are also a number of online retailers that sell knee pads such as southwest amazon.com.

Answer format: ending1/ending2/ending3/ending4