Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to run for longer [title] Take time to warm up and stretch out. [step] It can be tempting to just get on with the running part of running, but properly preparing your body will pay dividends in your results. A proper warm up can also reduce your chance for progress-derailing injuries, such as a pulled hamstring.

Ending1: [substeps] The best warm-up for running isn't going for a long run. Aim to run for at least 20 minutes, making a few shorter runs. Ending2: [substeps] Warm up your muscles for 10-15 minutes before beginning your workout proper. Start by walking and gradually picking up the pace until you reach a full run. Ending3: [substeps] Do a brisk jog or quick walk during the time you are running. Swap out your normal jogging shoes for light rubber booties and shoes that fit well. Ending4: [substeps] Do some good stretches before run to get yourself warmed up. Stretch for about 20 to 30 seconds, then stretch again for about 60 seconds.

Answer format: ending1/ending2/ending3/ending4