Please choose the correct ending to complete the given sentence: Health: [header] How to prevent muscle cramps during exercise [title] Warm up before you work out. [step] Muscles that aren't sufficiently warmed up before you start working out may have the tendency to cramp more. Particularly if you're about to engage in strenuous or endurance-based exercise, adequate warm-up is crucial to preventing muscle cramps.

Ending1: [substeps] Warming up requires cooling yourself up before and during exercise, making sure your body is warm. Some examples of warm-up activities you can do to warm up include: walking, jogging, or jumping rope. Ending2: [substeps] Try performing a warm-up stretch before you start the exercise. With the side of the body closest to the rest of the body (the pelvis), lower back, and thigh, stretch the muscles on these side. Ending3: [substeps] The type of warm up you do depends on your overall workout. For example, if you're going for a run, walking for five to 10 minutes before your run is a good warm-up. Ending4: [substeps] Heating up your muscles helps them relax and improve their flexibility. Place warm-up items such as warm-up pads, leather shoe boxes, lunch bags, and often lightly fitted exercise gloves into a warm-up box set by your gym or exercise equipment center.

Answer format: ending1/ending2/ending3/ending4