Monthly Archives: January 2010

Breaking Down Sheri’s Stroke

Not long after I looked at Ana’s stroke, I jumped in and took a peek at how Sheri was swimming. As you might notice, there are some similarities between Ana’s and Sheri’s stroke. That’s not a huge surprise, because some of the issues I see tend to be common among most swimmers.

One of the first things that you notice is Sheri’s body position. You can see pretty quickly that her hips are riding a bit low in the water. Typically, this is a simple head position issue. You want to have your head lined up with the rest of your body, as opposed to having your head up, looking out in front of you. In this case though, Sheri does a pretty good job at keeping her head in the proper position. In fact, even when she turns to breathe she does a nice job at not lifting her head for air. Instead, Sheri’s poor body position is because of two different issues; she tends to swim with her chest rather high in the water and her kick is generating almost no lift.

so1The solution to the first part is rather easy, the second is a bit more of a challenge. Sheri needs to lower her upper body down into the water by a few inches. It’s very simple to do but will often feel awkward because it takes a while to get comfortable swimming so low in the water.  One way to make the adjustment is to push off the wall in a streamlined position,  and with no kicking or pulling, adjust your body position so that you are flat or horizontal in the water. It may take a kick or two to keep your feet on the surface once you slow down from the push off the wall, but once you find that flat position in the water, you need to use it in your regular swimming.

The next piece of this puzzle is her kick. Sheri’s kick looks to be a 4 beat crossover kick. This means that she will kick twice for every arm stroke and  that at a certain point in her kick the left leg crosses under the right. Why the crossover? If you watch, you can see that she has good body rotation when she breathes to the left, but much flatter when she rotates to the right. A good kick is typically straight down and initiates the rotation to the other side. Because her kick is weak and rotation not as strong on this side, Sheri’s left, or bottom leg tries to compensate by kicking diagnally and across her body. Hence the cross over.

so22The main problem with Sheri’s kick is that it is almost entirely from the knees down. She is generating no power from her hips. As I have mentioned other times, you want to kick in freestyle like you kick a ball. The hips start the kicking motion and you finish through the knee and ankle. Sheri’s hips and knees aren’t coordinating with each other, so any force that she is creating is coming from her knees and ankles.

Fixing this can be a bit more of a challenge, because the kick creates a rhythm and a timing for the whole stroke, and so changing this bad habit often feels like you are overhauling your entire stroke. I would recommend that she dedicate some serious pool time this winter to kicking, both with and without fins, and really focus on kicking a ball everytime.

The final piece of Sheri’s stroke that I want to address is a common one. Dropping her elbow. As Sheri’s arm begins the pull, you can see that it’s her elbow, not her hand or forearm that is the leading edge through the water. In fact, her forearm doesn’t get vertical until her pull is at her hips. I go into greater detail about this problem here, but in a nutshell she needs pull with her hand and forearm and not her elbow. A good drill to do to work on this is swimming with a closed fist. By removing the surface area of your hand you are forced to use your wrist and forearm to move you through the water. By doing this and focusing on where your elbow should be in relation to your forearm, you can correct the problem. Doing the pull correctly usually results in that AH HA! moment as you generate considerable more power from each stroke immediately.

Fixing bad habits in the water can be a bit frustrating, but if Sheri spends the time now making these adjustments, she will be coming out of the water faster and have used less energy. I’m sure this will be a motivator, because I know Sheri would love nothing more than to get the heck out of the water and onto something else, like the bike and the run.

Posted in Swimming, Swimming Technique | Tagged , , , , , , , , | Leave a comment

Breaking Down Ana’s Stroke

Before the holidays, I met up with Ana, one of my fellow Ironman Cozumel entrants. She was looking for a few tips on her stroke so I broke the underwater camera to see what I could find. First of all, as it is quite obvious, Ana is clearly a strong swimmer with a good stroke. From the surface looking down, it is hard to see anything that really needed correction. I did notice that she wasn’t getting much acceleration when pulled, which typically means the elbow is dropping. Once I hopped in and saw her stroke underwater I was able to pick up a few key issues.

Body Position: The first thing I noticed was the body position in the water. Her hips are riding a little low in the water, and this is the main reason her kick rate is so high. (See the pic below as well) She’s using her kick not for rotation or propulsion (see more on the kick here and here), but for lift. The kick is trying to keep here hips/legs high in the water. By adjusting her overall body position slightly she will save her legs from all the kicking and save gobs of energy in the process.

 

 

Pull: In watching her swim, I coanauld tell pretty quickly that Ana drops her elbow as she pulls. It can be a little difficult to pick up if you don’t know what your looking for, so I grabbed a still shot so that you can see what I am trying to point out. As I have mentioned before, dropping your elbow is very common in all levels of athletes, and especially so as you fatigue because you can maintain your cadence. The problem is that you’re reducing the efficiency of your pull dramatically as you do this. So once we adjust the body position, we can focus on maximizing the pull. (I go into the high elbow in much greater detail here, but in a nutshell, by leading your pull through the water with your elbow, you can drastically decrease the effectiveness of your stroke. We worked on the pull a good bit while we were there and I could see some great improvement by the end of the session. In fact, if you look at the two videos posted here you can see a difference in the second video (taken towards the end of the swim).

Kick: Now that the position is corrected, we can adjust the kick itself, because if we tried to do it first, her legs would just sink or she would revert back to her old ways so that she wouldn’t sink.

Ana has a 6 beat kick, meaning that for every stroke cycle she kicks 6 times, or 3 kicks for every pull. It takes her about 15 strokes to swim (which by the way is quite good) so that means she kicks 45 times for every 25 yards, or about 7,600 times in an Ironman swim. If she can convert her swim to a 2 beat kick (more about the 2 beat kick here), she could reduce her effort by 5,100 kicks in the Ironman. That energy would be much better spent on the bike and run. Improving her kick will also improve her body rotation, which will help her pull and body position.

For those learning to swim, or even for those who’ve been swimming for a while, this might seem like I’m beating up a a good stroke. Truth is, it is a good stroke (Don’t worry Ana!) but there are some key things holding her back from getting to the next level. And for the purists out there, yes there are some other things going on, like the pitch of her hand and her entry point, (causing some of those bubbles during her pull) for example, but these are minor and simple to correct once some of the other stuff is addressed.

Clear as mud right? Got questions? Let me have it.

Oh and Sheri, don’t worry, you’re next :)

Posted in Swimming, Swimming Technique | Tagged , , , , , , , , , , , | 1 Comment