Interval Training

  • Author:
    Richard Weil, MEd, CDE

  • Medical Editor: William C. Shiel Jr., MD, FACP, FACR
    William C. Shiel Jr., MD, FACP, FACR

    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

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What should I do for a cool-down after interval work?

I recommend a minimum of five minutes of cool-down at a low intensity after your intervals. I also recommend stretching afterward because the leg muscles will be tight after an intense session. Quad, hamstring, calf, and low-back stretches will help. Sometimes muscles are too tight to stretch immediately after your interval session and so you might want to walk around for a bit and then stretch later in the day.

Wrapping it up

There you have it. Interval training is an efficient and effective training method that will help you improve your aerobic and anaerobic capacity, your performance, your recovery from short and intense bouts of work, and all in less than one-fifth the time of traditional aerobic conditioning. Intervals are tough but worth the effort. Give it a try and see what you think. Good luck with your training!

Medically reviewed by Avrom Simon, MD; Board Certified Preventative Medicine with Subspecialty in Occupational Medicine


Burgomaster KA. "Similar metabolic adaptations during exercise after low volume sprint interval and traditional endurance training in humans." J Physiol. 586(1) Jan. 1, 2008:151-60.

Burgomaster KA and others. "Six sessions of sprint interval training increases muscle oxidative potential and cycle endurance capacity in humans." J Appl Physiol. 98(6) June 2005:1985-90.

Gibala MJ and others. "Short-term sprint interval versus traditional endurance training: similar initial adaptations in human skeletal muscle and exercise performance." J Physiol. 575(Pt 3) Sept. 15, 2006:901-11.

Parra and others. "The distribution of rest periods affects performance and adaptations of energy metabolism induced by high-intensity training in human muscle." Acta Physiol Scand 169 (2000): 157-165.

Medically Reviewed by a Doctor on 6/30/2015

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