Awhile back I had tried to record myself swimming freestlye and ask around the net for commentary, but it was with a low-quality camera and only above-water footage. Not getting too much feedback at that time, I decided to buy a underwater HD camera and try to use that as a reference and improve my freestyle technique. Over about 40 days I have recorded ~16 sessions, and tried to gradually improve things. Here is what I have improved:
- No longer crossing over arms in middle (at least most of the time)
- Entry occurs when arms are more stretched forward, before my elbow was bent ~90 degrees for some entries
- Left pull is a bit more consistent, but still not a clean S curve like right arm (yes I'm right-handed)
- kick is a bit tighter and more controlled (though this probably still needs to be made even smaller, with less knee kick)
- neck angle when breathing is less extreme, before I was turning upwards much more than necessary
I still look straight down at the bottom when swimming much of the time, partially because if I look forward with a 45-degree angle I can't really see much anyway because my goggles get in the way, although I know doing this will make my breathing more natural, and possibly improve my posture overall.
I have been doing alot of catch-up with a pull bouy and that seems to have helped me control my upper body more. Also been doing alot of stretches to enable my foot to stretch to a greater degree, and doing a few laps with zoomers to help improve my overall kick form.
Anyway, the result of my recent training can be seen in the following video, where I edited together a few sessions together, and you can see my technique from a few different angles, both above and underwater.
YouTube- Jeff's Freestyle Technique 7/5/2010
I was concerned about doing too much endurance training with 'bad' form,but I think I am nearly ready to start doing less form work and a little more endurance training. However before that I really would like to get some critique from some masters swimming forum members.
If I were to point out my #1 problem at present, it is a lack of 'balance' in the water, though I am not sure exactly what that means or how to work on it. When I see videos of pro swimmers like Michael Phelps I am amazed by how their arms seem 'anchored' in front, whereas I have to struggle to even keep them straight. It takes a conscious effort to not cross over the middle, and even then I can't seem to keep my arms 'anchored' in front.
I do most of my training in a housing-development pool with no swimming friends, so any commentary would be very helpful.
Thanks very much!
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Former Member
Another old debate that this data sheds light on is the issue of accelerating through the pull.
I suspect that most of us think of ourselves as swimming at a near constant velocity so that if we push back at constant velocity our hand will be traveling backward at a constant velocity. The data shows that the swimmer is actually varying between 1.5m/s and 2.25m/s for a range of 0.75m/s. That means that your hand has to also accelerate a like amount in the opposite direction just to maintain the same velocity and pressure on the water!We collect velocity telemetry at 1,000 data points a second to reveal all those variations in velocity, that the human eyes is not capable of sensing during a stroke cycle. Combined with the synchronized video we believe this currently is the best method of taking some of the guesswork/debate out of exactly when everything is really occurring from a velocity standpoint. The technology was developed and constantly improved over the last 25 years to help swimmers improve their performance, and give them an opportunity to view what they are doing, instead of trying to copy and visualize someone else.
Every stroke cycle has velocity variations. The water is not a fixed object, that you can grab and absolutely hold onto, so maintaining a constant velocity is not possible.
Another old debate that this data sheds light on is the issue of accelerating through the pull.
I suspect that most of us think of ourselves as swimming at a near constant velocity so that if we push back at constant velocity our hand will be traveling backward at a constant velocity. The data shows that the swimmer is actually varying between 1.5m/s and 2.25m/s for a range of 0.75m/s. That means that your hand has to also accelerate a like amount in the opposite direction just to maintain the same velocity and pressure on the water!We collect velocity telemetry at 1,000 data points a second to reveal all those variations in velocity, that the human eyes is not capable of sensing during a stroke cycle. Combined with the synchronized video we believe this currently is the best method of taking some of the guesswork/debate out of exactly when everything is really occurring from a velocity standpoint. The technology was developed and constantly improved over the last 25 years to help swimmers improve their performance, and give them an opportunity to view what they are doing, instead of trying to copy and visualize someone else.
Every stroke cycle has velocity variations. The water is not a fixed object, that you can grab and absolutely hold onto, so maintaining a constant velocity is not possible.
