arena Swim of the Week: 15-Year-Old Amalie Smith Sets British Junior Record With 4:41 400 IM

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Disclaimer: Swim of the Week is not meant to be a conclusive selection of the best overall swim of the week, but rather one Featured Swim to be explored in deeper detail. The Swim of the Week is an opportunity to take a closer look at the context of one of the many fast swims this week, perhaps a swim that slipped through the cracks as others grabbed the headlines, or a race we didn’t get to examine as closely in the flood of weekly meets.

British age grouper Amalie Smith continued her rapid rise up the ranks last week at the 25th Euro Meet in Luxembourg, setting a trio of best times and shattering a British Age Record in the process.

Smith, 15, won the women’s 400 IM at the senior-level meet in a time of 4:41.70, blowing away the competition despite being one of the youngest swimmers in the field.

The swim took down the British Age Record for 15-year-old girls of 4:43.36, set by Katie Shanahan in 2019, and obliterates her previous personal best of 4:48.09 set in late November at the Rotterdam Qualification Meet.

Relative to her previous best time, Smith showed significant improvement on backstroke and breaststroke, gaining nearly six seconds over the middle 200, while compared to Shanahan, she lost some ground on back but more than made up for it on breast (and gained another second on the last 50 of free).

Split Comparison

Shanahan, 2019 Smith, 2024 Smith, 2025
30.60 30.72 30.41
1:05.93 (35.33) 1:06.12 (35.40) 1:05.51 (35.10)
1:42.98 (37.05) 1:45.39 (39.27) 1:43.22 (37.71)
2:18.95 (35.97) 2:22.94 (37.55) 2:20.16 (36.94)
2:58.75 (39.80) 3:02.68 (39.74) 2:58.62 (38.46)
3:38.85 (40.10) 3:44.33 (41.65) 3:37.90 (39.28)
4:11.52 (32.67) 4:17.53 (33.20) 4:10.71 (32.81)
4:43.36 (31.84) 4:48.09 (30.56) 4:41.70 (30.99)

Smith now ranks 11th all-time among British women in the 400 IM, and sits 3rd in the world for the 2024-25 season.

2024-2025 LCM Women 400 IM

Summer CAN
McIntosh
03/07
4:26.98
2Abbie
Wood
GBR4:38.2402/15
3Mio
NARITA
JPN4:38.7301/17
4WAKA
KOBORI
JPN4:39.7101/26
5Katie
Shanahan
GBR4:41.4002/15
View Top 26»

In addition to to her 400 IM breakthrough, she also set best times in the 200 IM (2:14.57) and 200 breast (2:29.77), which rank 6th and 7th, respectively, all-time among British 15-year-olds.

Smith’s progression since last summer has been remarkable. At the 2024 British Championships, she placed 4th in the 400 IM in the 18 & under category in a time of 4:57.66, nearly 16 seconds slower than she went in Luxembourg.

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Regan Smith 56 and 53 100 back
1 month ago

McIntosh split 2:06.30/2:18.04 in her WR swim so splitting 2:20.16/2:21.54 is crazy just to think she was 17 seconds off the WR but only 3.5 on the back half

Ldn
Reply to  Regan Smith 56 and 53 100 back
1 month ago

Amalie is rather good at 200 breast so that mostly explains it,; Katie Shanahan is a back specialist as well so Amalie was understandably well behind her time after 200; Summer however is like a different galaxy to the rest of the world

Cassandra
1 month ago

wow theres a lot of fast juniors in the 400 im right now — is that historically normal? have to imagine 1-2 of them will likely emerge as a serious podium threat soon…

Dee
1 month ago

2.20/2.21 is some way to split a 400im

About James Sutherland

James Sutherland

James swam five years at Laurentian University in Sudbury, Ontario, specializing in the 200 free, back and IM. He finished up his collegiate swimming career in 2018, graduating with a bachelor's degree in economics. In 2019 he completed his graduate degree in sports journalism. Prior to going to Laurentian, James swam …

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