There is an increased risk of both injuries and cardiovascular events during speed sessions. Be sure to get your doctor's OK before beginning a speed program. Don't ever continue to run – even 10 yards – when you suspect that you may have an injury or a real cardiosvascular problem. Stop, take an extra 2-3 days off and get medical advice if necessary. When in doubt, take more rest, more days off, and run slower. In other words… be more conservative.
Jeff Galloway, US Olympian and creator of the Run-Walk-Run method, has helped over 350,000 runners achieve their goals through his innovative training programs. As Runner's World's monthly columnist and author of North America's best-selling running book, Jeff has spent over 50 years sharing his expertise and continues to conduct running seminars worldwide as runDisney's Official Training Consultant.
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