How Do Ledecky and McIntosh Swim The 800? Stroke Count Analysis

by Will Baxley 22

June 13th, 2025 Canada, National, News

It’s only June, and the women’s 800 free has already experienced its fastest year ever. 

After Katie Ledecky delivered a mind-boggling 8:04.79 to win gold at the 2016 Rio Olympics, nobody neared that time for eight more years – Ledecky included. Flash forward to 2025, and Ledecky suddenly rekindled the spark she had in 2016, breaking her own world record in 8:04.12. She showed the swim wasn’t a fluke by following it up with an 8:05.76 at U.S. Nationals. 

Ledecky seemingly burst open a dam, as this week, Summer McIntosh and Lani Pallister both advanced as the #2 and #3 performers of all time with four-plus-second personal bests. McIntosh hit 8:05.07 at Canadian Trials, while Pallister turned in an 8:10.84 at Australian Trials.

Ledecky is a symbol of persistence who challenges the swimming world to reach her heights. Despite our freestyle GOAT’s signature metronomic consistency, however, she couldn’t swim identically as a 28-year-old to how she swam at 19, right?

Looking at stroke count comparisons of her world-record swims this year and in 2016, the answer is yes, her race is swum differently now – but not by much. Despite going a best time this year, Ledecky’s stroke efficiency decreased compared to her 19-year-old self. She took 651 strokes to break the world record this year, while in 2016 she took 641 strokes en route to her 8:04.68.

A 10-stroke difference seems minimal, though, when comparing Ledecky’s swims to her closest rival, McIntosh. The Canadian took around 606 strokes* to reach her 8:05.07 Canadian Record, significantly less than Ledecky. McIntosh’s stroke efficiency is much higher despite being four inches shorter than Ledecky, and despite Ledecky having above-average underwaters for a distance swimmer.  The American more than makes up for this DPS gap with an unrivaled tempo. This goes to show there’s more than one way to skin a cat.

800 Free Stroke Counts

McIntosh, 2025 Canadian Trials Ledecky, 2025 Fort Lauderdale Ledecky, 2016 Rio De Janeiro
50 32 36 36
100 36-38* 41 41
150 37 41 40
200 37 40 41
250 38 40 40
300 38 40 40
350 39 40 40
400 37 40 40
450 38 41 40
500 39 41 40
550 39 42 40
600 39 42 40
650 39 42 40
700 38 42 41
750 39 42 40
800 40 41 42
Total 605-607 651 641
Average 37.9 40.7 40.1

 

*McIntosh leaves frame for a few seconds during the second 50 of her 800 in the only full video of McIntosh’s race. This stroke count is an estimate.

Watch all three races below:

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swimswum
5 hours ago

This is fun to read! Thank you

Captain bubbles
6 hours ago

I didn’t realize how many strokes KL takes. She really just has a mad mad turnover

Ahoy Knotty Buoy!
7 hours ago

Nice work and analysis. The Singapore women’s 800 race should rival the 2012 London one in terms of fan interest and anticipation.

Lane Nine
10 hours ago

People, the bottom line is who finishes first. Wait until the next race.

Thomas The Tank Engine
Reply to  Lane Nine
2 hours ago

The bottom line is, everyone will die

Last edited 2 hours ago by Thomas The Tank Engine
SwimCoachSean
10 hours ago

For the 2nd 50, it is 35, 37, or 39 – not an even number, and almost certain 37. Her first pull is with her left arm, but her cycle starts with her right, and she finishes on a full cycle.

Mr Piano
10 hours ago

TIL that Katie Ledecky went 8:04.68 in Rio

Walsh-Madden-Grimes-Weinstein
10 hours ago

If Katie Ledecky would stop trying to overcook herself in the heats of the W 1500 FR and W 800 FR, she would more gas in the tank for the final of the W 4 x 200 FR-R and the final of the W 800 FR.

In regard to the W 1500 FR, Katie Ledecky could post a time of 15:50 in the heats, post a time of 15:30 in the final, yet still win by 10 seconds. At the age of 28, a pursuit of the World Record in the W 1500 FR does no favors later in the competition when the gas gauge reads empty.

EMG2020Transform
11 hours ago

I’m just going to randomly mention Sun looking like he was effortlessly doing Popov’s practice sets while setting wrs

Ice Age Swimmer
Reply to  EMG2020Transform
9 hours ago

If I recall correctly, Sun took 27 strokes per 50 meters, while the next guy behind him took 39.