Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to protect yourself from an acl tear [title] Warm up your muscles before exercising. [step] As you prepare to practice or play a game that may strain your acl, be sure to warm up fully. This should happen about 10-15 minutes before activity.

Ending1: Warm up with a series of stretching and exercises intended to enhance blood flow and bring oxygen to the knee joint muscles. These will also increase the flow of lubricating synovial fluid, which helps your knee joints function smoothly. Ending2: Before starting a soccer league or taking a swim, do a warm up before or while playing. [substeps] Get a warm-up buddy so you're able to work out without pain or discomfort. Ending3: Keeping your muscles warm improves performance, especially your cuticles as these are particularly sensitive. [substeps] Take a hot shower or bath right before exercise to help stretch and tighten up your muscles. Ending4: Working out at a moderate pace can work great, but to build intensity and endurance before and after sports, you'll need to work quickly after an event or game. [substeps] A good way to warm up is to exercise for a few minutes throughout the day before or right before a game.

Answer format: ending1/ending2/ending3/ending4