10 Ways to Reduce Frontal Drag

Frontal drag is the number one enemy of the swimmer. Swimming is arguably the most technique sensitive sport on the planet. With water being some 800 times denser than air, the frontal drag forces that slow swimmers down come into play at much slower speeds than all other sports on land. For that reason, in order to become fast, we must learn how to reduce frontal drag as much as possible.

There are three types of frontal drag; friction, pressure (form) drag and surface (wave) drag. Researchers have shown that all three can contribute significantly to the slowing of a swimmer. In any given medium, including water, the frontal drag forces of an object are determined by its shape, its surface texture (friction) and its speed squared. Here are ten good ways to help reduce frontal drag.

  1. Keep the body aligned. A curved body creates more frontal drag than a straight body. While some curve in our body is needed in order to create more propulsion, such as during the hip undulation in the dolphin kick, it is important that we bend, but not break the body. Too much curve or too much angle of one of our appendages sticking out causes an enormous increase in frontal drag. Keeping the body aligned requires having a tight core.
  2. Keep the head down. Keeping the head down helps keep it in alignment with the body, but more importantly, a head down also can help reduce surface or wave drag. There is actually less drag underwater than on the surface of the water (think of a submarine), because we eliminate surface drag. Frontal drag is proportional to our speed squared, so ideally, we would like to see the head submerged during the fastest point in the stroke cycle, which I call the surge point. All four strokes have a surge point where the head should be underwater, even if it is slightly so.
  3. Pull underwater with a high elbow. In the pulling motion of all four strokes, the upper arm is the ‘bad cop’, causing most of the frontal drag. By keeping the elbow nearer to the surface (except it backstroke) and more in alignment with our body’s motion, we can reduce, but not eliminate, the frontal drag caused by the forward motion of the upper arm during the pull.
  4. Wear the fastest technology racing suit possible. The records set in 2008 and 2009 convinced all of us that the suits really matter. Even today, the best suits help reduce friction and keep the body tighter to reduce frontal drag.
  5. Shave all the hair from your body. Although this is generally not done (or recommended) until post puberty, when significantly more hair grows on the body, shaving the entire body will reduce friction and make us slicker and faster.
  6. Streamline off the start and all turns. Getting into the tightest streamline possible creates a huge advantage when you are moving fast. The fastest point you will reach in a swimming race (about 15 mph) is when the fingertips touch the water off the starting block. The second fastest is when your toes leave the wall on each turn (6-8 mph). At either time, because of the exponential relationship between speed and frontal drag, you had better get into the tightest streamline possible.
  7. Keep your kick tight. In freestyle, backstroke and breaststroke, the kick must be tight in order to help reduce frontal drag. With the former two, that means not bending the knees too much and in breaststroke, it means keeping the knees at or inside the hips.
  8. Double cap. Covering up that thick head of hair and creating a new surface for your head with the reduced friction of silicone is another good way to reduce drag. Most athletes today will double cap, leaving the goggle straps between the first and second caps. The outer cap should be a thicker silicone material to maintain its smoothness.
  9. Wear low profile goggles. Racing goggles should be strapped on tighter to the face and are a little smaller and sleeker than larger training goggles. The less they protrude from your face, the better.
  10. Point your toes. One of them most common mistakes made on the start is not pointing the toes at entry. A German study recently showed that a relaxed foot creates 40% more frontal drag than a pointed toe. In general, the less splash one makes on the dive entry, the less frontal drag. The other common strokes where the relaxed foot causes more frontal drag is at the end of the breaststroke kick and the down kick in dolphin. In either case, keep the toes pointed backward to reduce drag. 

If you successfully comply with all of the above, you will graduate from being a swimmer, one who slogs through the water, to become a much faster ‘swipper’, a swimmer that slips through the water. Let’s hope you become a ‘swipper’! (Click here to find out what a swipper is)

Yours in swimming,

Gary Sr.

15 Responses to 10 Ways to Reduce Frontal Drag

  1. Zoe Martin

    Just love all these blogs on swimming techniques, I have been swimming for years but this site just keeps me reading more and learning more. Keep them coming pls

     
    • Gary Hall Sr.

      Thanks Zoe! Glad you enjoy them. We will keep them coming.

       
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  3. Cristiano

    Hi Gary,

    Love your posts, they speak very well about the water world.

    I saw the same text that you wrote on the following website, I think you may want to claim the credits:

    https://youswimm.wordpress.com/2016/02/25/some-best-effective-way-to-reduce-frontal-drag-in-swimming/

     
  4. Preksha

    Thank you so much for sharing such a wonderful information. This will really help me in swimming faster and with good technique. I have a question. When you say “and in breaststroke, it means keeping the knees at or inside the hips” – please help in visualising how to do this

     
  5. Blaise Vera

    Hello,

    I had a question concerning the effect of drag as a potential use of propulsion.

    If one were to say, have more drag on the underside of your arm and towards the bottom of your forearm, would it be beneficial to keep hair there so that it can cause drag to keep the arm in position in the water. The person could build up their strength in the sense that it wouldn’t matter, but shave the top of the arm and not the bottom. I was wondering if maybe you could think this over and see if there would be anything beneficial to not shave the bottom of your arms, but to only shave the top. I think that it would help you maintain a catch in the water due to friction. I may be wrong. I would love it if you could respond to me using my email account which is, blaise.vera0@gmail.com.
    Thank you for your time.

    Blaise Vera

     
    • Gary Hall Sr.

      Hi Vera,

      Frontal drag causes forces that slow a swimmer down. Propulsion comes from the surfaces moving backward relative to the water that create drag in the opposite direction. The hands and feet are primarily responsible for propulsion…very little from the forearm. Although the forearm does move backward, I doubt leaving the hair on the forearm will offset the additional friction it causes in the early phase of the underwater pull, when the forearm is moving forward. I understand your thinking…but don’t think it would help much, if at all.

       
  6. Laurie

    I’m confused about freestyle head position: I’ve been instructed by different coaches to tuck my chin in or to look slightly forward. Are you saying to look straight down and then submerge the whole head at some point?
    Thanks for the great post.

     
    • garyhallsr

      Yes, Laurie. We are saying it is better to keep the head down (looking down…not forward) and have it submerged at the ‘surge point’, which should occur just as one hand enters the water in front of you. Hope this helps!

       
  7. Paul Ash

    High Gary

    I have also noticed poor body rotation on one side creates enormous frontal drag.

     
    • garyhallsr

      Not sure about this one, but we just purchased the first technology in the USA that measures frontal drag. We will test your hypothesis soon. In my thought, rotation doesn’t reduce frontal drag…just increases propulsion.

       
  8. garyhallsr

    Not sure about this one, but we just purchased the first technology in the USA that measures frontal drag. We will test your hypothesis soon. In my thought, rotation doesn’t reduce frontal drag…just increases propulsion.

     
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