Marathon Swimming Rules Survey: Results and Analysis

Marathon swimmers talk a lot about rules - what should and shouldn’t be allowed during a swim - but as far as I know, there has never been any systematic study of what marathon swimmers actually think, as a matter of public opinion.

Perhaps most would agree that goggles are OK, and fins are verboten… but what about drafting off the escort boat? If you only read blogs and forums, you might assume the most vocal opinions represent the majority. But do they really?

Earlier this month the survey to find out. Over 25 days, we received 175 responses from around the world.

Summary of Findings

I. We received responses from a representative sample of marathon swimmers - current, former, and aspiring.

II(a). Marathon swimmers agree on basic channel-rules attire: traditional porous textile swimsuit (including jammers), goggles, one latex or silicone cap, ear plugs, and nose clips.

II(b). Marathon swimmers agree that substances or devices that protect the swimmer against dangerous marine life (e.g., sharks & jellyfish) – but unambiguously do not enhance performance – are acceptable.

II(c). Marathon swimmers agree that devices or substances that unambiguously enhance speed, buoyancy, or heat retention should NOT be allowed on marathon swims.

III. Controversial items include stinger suits, swim streamers, bubble caps, and shark divers.

IV. The more marathon swimming experience a person has, the more likely she/he is to embrace a minimalist approach to swim aids.


I. We received responses from a representative sample of marathon swimmers - current, former, and aspiring.

To argue that this survey accurately represents the opinion of the marathon swimming community, we must show that the 175 respondents are a representative sample of the community. We can do this in a few ways.

A. Geography

Of the 175 respondents, 71% live in North America, 19% live in the United Kingdom or Ireland, 5% live in Australia or New Zealand, and the remaining 5% live elsewhere.

As a baseline for comparison, here’s how those numbers compare to the unique visitors to the Marathon Swimmers Forum in February.

geog

Geographical distribution: Survey respondents vs. Marathon Swimmers Forum visitors

Another baseline for comparison? The Triple Crown list: as of 2012, 76% are from North America, 10% from the UK+Ireland, 4% from Australia+NZ, 4% from continental Europe, and the rest from elsewhere.

In sum, the survey sample has a lot of North Americans - but then, so does the global marathon swimming community generally.

B. Gender

gender

Gender distribution of survey respondents

What about the Triple Crown list? Exactly 60% men, 40% women. Pretty darned close.

C. Self-identification as a marathon swimmer

We asked respondents what they “identify most closely as.” Although we didn’t forbid non-marathon swimmers from taking the survey, we promoted and targeted it primarily at marathon swimmers, because that’s what our primary interest was: What do _marathon swimmers _think?

According to the data, 87% of respondents identified as either a current, former, or aspiring marathon swimmer.

Self-identification of survey respondents

Self-identification of survey respondents

D. Marathon swimming experience

We asked survey respondents about their specific experience in marathon swimming (and other endurance sports). We found that:

  1. 90% of survey respondents have swum at least 10km in open water.
  2. More than half have swum at least 25km in open water.
  3. Almost a third have swum the English Channel.

Accomplishments of survey respondents.

Marathon swimming experience of survey respondents.

Interesting sub-finding: Marathon swimmers are not as challenged on terra firma as the stereotypes might suggest. Almost half of respondents have done an Olympic-distance triathlon (or longer), and 30% have run a marathon. In comparison, Runners World estimates the percentage of the U.S. population who have run a marathon at 0.5% (ref).


II. Marathon swimmers largely agree on what should (and should not) be used in their sport.

Now to the meat of the study. What do marathon swimmers agree on?

Some critics and swim-aid proponents would have you believe the marathon swimming community can’t agree on what their own rules are. The implicit argument is typically: “Therefore, we might as well just let people use anything they want.”

Actually, the marathon swimming community agrees on quite a lot.

A. The marathon swimming community agrees on basic channel-rules attire: traditional porous textile swimsuit (including jammers), goggles, one latex or silicone cap, ear plugs, and nose clips.

B. The marathon swimming community agrees that substances or devices that protect the swimmer against dangerous marine life (e.g., sharks & jellyfish) - but unambiguously do not enhance performance - are acceptable.

More than 75% of survey respondents agreed that the following items are acceptable:

Percent of respondents who agree that item should be allowed on marathon swims

Percent of respondents who think item SHOULD be allowed on marathon swims

C. The marathon swimming community agrees that devices or substances that unambiguously enhance speed, buoyancy, or heat retention should NOT be allowed on marathon swims.

(Including drafting off the escort boat, which is allowed in the English Channel.)

More than 75% of survey respondents agreed that the following items are NOT acceptable:

Percent of respondents who agree that item SHOULD NOT be allowed on marathon swims

Percent of respondents who agree that item SHOULD NOT be allowed on marathon swims

D. More moderate consensus exists on the following:

agree3a

Percent of respondents who think item should be allowed

Some thoughts on why there is less consensus on these items:

  1. Using boat to shield from wind & waves - improves performance, but is already widely allowed, and it’s unclear how a prohibition could be enforced.
  2. Exiting water for safety reasons - allowed in MIMS and Cook Strait, but not elsewhere.
  3. Topical substance that retains body heat - does such a substance even exist? Perhaps a confusing question.
  4. Multiple caps - allowed by FINA, minimally performance enhancing.
  5. Shark sharpshooter - not performance enhancing, but harmful to sharks and thus morally problematic.
  6. Topical substance that warms the body - does such a substance exist? Confusing question.


III. Controversial items: stinger suits, swim streamers, bubble caps, and shark divers.

A. Shark divers. 59/41 (for/against).

B. Bubble caps. 43/57 (for/against).

C. Swim streamers. 46/54 (for/against).

D. Stinger suits. Tie - 50/50. 

(If you must know, the stinger suit vote was 84-yes, 83-no, with 8 no answers.)

My view: if an item is controversial, it cannot be considered “approved by the sport of ocean swimming.” At best, it might be considered a “local exception” to a more universal set of rules - for example, the use of streamers in Japan.

If an item is controversial, it is in some way approaching a line in the sand. In marathon swimming, if you’re flirting with this line - trying to find loopholes for some extra edge - quite simply, you’re doing it wrong.

Some stinger suit proponents claim that these enhanced-coverage suits are merely protective, not performance-enhancing - and that therefore they should be allowed on marathon swims.

Personally, I’m not sure about this claim. Couldn’t someone easily produce a stinger suit that _is _performance enhancing? Would we then have to define new rules about what is and is not a performance enhancing stinger suit? Could I put on my old full-body Blueseventy Nero tech suit and call it a “stinger suit”?


IV. The more marathon swimming experience a person has, the more likely she/he is to embrace a minimalist approach to swim aids.

The data presented so far represent the “collective” opinion of the marathon swimming community. However, within that collective, there is actually quite a diversity of opinions among individuals. For example, one person might think a streamer is OK but a stinger suit is not OK; while another person might think a streamer is not OK while a stinger suit is fine.

This diversity of opinions in the survey sample ranged from:

For each survey respondent, I summed the total number of items the individual would allow - as an ideology index. So the minimalist respondent I mentioned above would get a 9 on the ideology index, while the everything-is-allowed respondent/troll would get a 48.

Here’s how the respondents were distributed according to ideology:

Histogram showing number of respondents grouped by how many items they would allow.

Histogram showing number of respondents grouped by how many items they would allow. Each number on the X-axis represents a "basket" of 5. So, the people in the '25' basket are those who would allow between 21 and 25 items, out of a possible 48.

One interesting question is: Why do some people prefer a minimalist approach, while others embrace technology and swim aids?

We would need a much longer survey to tease out the various reasons, but even in this brief survey there is a clear pattern:

The more marathon swimming experience a person has, the more likely she/he is to embrace a minimalist approach to swim aids.

The following chart shows the average “ideology index” score (out of 48) for four groups:

  1. People who have never done a marathon swim (27 of 175 total respondents)
  2. People who have done a 10km open-water swim but not a 25km (56 of 175)
  3. People who have done at least a 25km swim or one of the Triple Crown swims (57 of 175)
  4. People who have done two or three of the Triple Crown swims (35 of 175)

Average ideology score, depending on marathon swimming experience

Average ideology score, depending on marathon swimming experience

The same pattern emerges when we look at people’s opinions on just a single item, for example, the controversial stinger suit.

Percent of respondents who think stinger suits should be allowed, according to marathon swimming experience

Percent of respondents who think stinger suits should be allowed, according to marathon swimming experience

Obviously there’s much more we could get into with this data, but for now this report is quite long enough already. And I think I covered the big points. If readers are interested, I will do a follow-up post with additional summary data and analyses, as requested - an “appendix” of sorts. Let me know what you want to know.

For reference, here are screenshots of the original survey (click to enlarge):

Posted 28 February 2013 in: analysis , rules/standards/best practices Tags: survey

Post a comment

All comments are held for moderation; basic HTML formatting accepted.

Name: (required)
E-mail: (required, not published)
Website: (optional)