Warming up gradually revs up your cardiovascular system, increases blood flow to your muscles and raises your body temperature. Choose a warm-up activity that uses the same muscles you'll use during your workout. If you're going to run, walk briskly for five to 10 minutes. A warm-up may cause mild sweating, but it shouldn't leave you fatigued.
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- Aerobic exercise: How to warm up and cool down. Mayoclinic.org. http://www.mayoclinic.org/healthy-lifestyle/fitness/in-depth/exercise/art-20045517. Accessed June 29, 2015.