Why read this: This piece offers a compact case study in a question that recurs across modern sport: where does the athlete end and the technology begin? Sabastian Sawe's London record is presented as the visible event, but the article quickly opens out into the surrounding ecosystem of carbon-plated midsoles, hydrogel nutrition, regulatory limits and doping suspicion. For C1 readers it is a useful exposure to sports-science register and to the way feature journalism builds an implicit argument while appearing only to report. Students who follow track and field will arrive with strong schema; those who do not will pick up a serviceable mental map of how marathon records are now made.
What to notice: Track three things as you read. First, the density of named entities and numbers — six athletes, eight or so brands, several years and times — and the fact that the writer expects you to hold them in mind without sign-posting. Second, the implicit pivot built into the structure: the lede credits the runner, the middle credits the shoe, and the closing paragraph reopens the question by introducing the doping context. Notice how the writer never accuses Sawe; the suspicion is communicated entirely through placement, hedged adverbs ("almost inevitably") and the careful mention of Adidas paying for extra anti-doping testing. Third, the running idiom layer — "beat the wall", "top up", "ramp up", "raise suspicions", "in light of" — which is dense enough to derail a Mandarin L1 reader who tries to translate literally.
Skills practised: Inferential reading: students reconstruct the writer's hedged argument from placement and adverbial cues rather than explicit claims. Vocabulary in context: a heavy load of Tier-3 sports-science compounds (super shoe, carbon-plated midsole, stack height, running economy, fat reserves, anti-doping testing) is supported by margin glosses, but students still have to integrate the meanings while tracking the article's argument. Tracking entities and numbers across a text: the chronology of 2019, 2022, 2023, 2024, 2025, 2026 is left for the reader to assemble. Genre awareness: students learn to recognise the explainer-feature mode, where Q-and-A sub-heads in the original become structural pivots, and where the most consequential claim is sometimes the one held back to the end.
Lighter Than a Bar of Soap: The Shoe Behind a Marathon World Record
Sabastian Sawe's London run rewrote what a marathon time can be — and reignited the question of where the runner ends and the technology begins.
Tap any green word in the article to see its meaning.
When Sabastian Sawe predicted last week that breaking Kelvin Kiptum's marathon world record was only a , few imagined the moment would arrive in London on Sunday. Yet in 1:59:30, the 31-year-old Kenyan of possibility — and inevitably, the conversation that followed turned not only to the runner but to what was on his feet.
Eliud Kipchoge ran a marathon in under two hours back in 2019, but that effort, staged under , was never . Remarkably, Sawe was joined in the history books by Ethiopia's Yomif Kejelcha, whose astonishing 1:59:40 made him only the second man under the mark in an official race. In the women's event, Tigst Assefa thrived too, shaving nine seconds off her own world record to clock 2:15:41. In a discipline obsessed with , how the trio managed it on a single Sunday in the capital.
The answer, many feel, lies in a single trainer: Adidas' Adizero Adios Pro Evo 3, which only two days earlier of London for the first time. The third iteration of a hugely popular , it was engineered with Sawe, Kejelcha and Assefa over three years, and Sawe credits Adidas for what he calls the lightest, most stable footwear he has ever sported. At 99 grams, it is the first to weigh under 100g — lighter than a bar of soap.
Recent improvements in marathon times have come largely from the , but the Pro Evo 3 wraps carbon technology around the midsole rather than embedding a rigid . The approach protects while shaving overall weight. “We were measuring things down to the nearest nanogram,” said Patrick Nava, Adidas' VP of running, who alluded to a development process that, in his words, “genuinely changes what a race-day shoe can feel like.” A wider release is expected later this year, when the shoes will retail at £450.
Has Adidas dethroned Nike? When Kipchoge first cracked the sub-two hour mark in 2019, the American looked unassailable, and Kiptum's 2023 Chicago record only burnished its reputation. But boundaries are there to be pushed. Adidas can now claim that the fastest man and woman ever to race a marathon both wore its shoes — even as rivals such as Asics, Saucony, Hoka, Brooks and New Balance keep tweaking their own offerings. have struggled to the technology. World Athletics' 2022 regulations cap at 40mm and limit shoes to a single carbon plate; trainers exceeding those limits remain raceable, but their times no longer count. Nava admits he doesn't know if there is a ceiling, calling it “fun to .”
Yet shoes alone cannot explain the run. Two decades of advances in sports science have taught coaches how to and glycogen so that the body draws on carbohydrates rather than over 26.2 miles. Sawe spent 32 days across six trips with the hydrogel specialists at Maurten, learning to absorb 90–120g of carbohydrates per hour without distress. And almost inevitably, when are set, there are those who . Ruth Chepngetich, the 2024 Chicago champion, was a three-year doping ban in 2025. his countrywoman's suspension, Sawe and Adidas paid the Athletics Integrity Unit $50,000 to in the last year's Berlin marathon — a quiet acknowledgement that records, like shoes, never travel alone.
When Sabastian Sawe predicted last week that breaking Kelvin Kiptum's marathon world record was only a , few imagined the moment would arrive in London on Sunday. Yet in 1:59:30, the 31-year-old Kenyan of possibility — and inevitably, the conversation that followed turned not only to the runner but to what was on his feet.
Eliud Kipchoge ran a marathon in under two hours back in 2019, but that effort, staged under , was never . Remarkably, Sawe was joined in the history books by Ethiopia's Yomif Kejelcha, whose astonishing 1:59:40 made him only the second man under the mark in an official race. In the women's event, Tigst Assefa thrived too, shaving nine seconds off her own world record to clock 2:15:41. In a discipline obsessed with , how the trio managed it on a single Sunday in the capital.
The answer, many feel, lies in a single trainer: Adidas' Adizero Adios Pro Evo 3, which only two days earlier of London for the first time. The third iteration of a hugely popular , it was engineered with Sawe, Kejelcha and Assefa over three years, and Sawe credits Adidas for what he calls the lightest, most stable footwear he has ever sported. At 99 grams, it is the first to weigh under 100g — lighter than a bar of soap.
Recent improvements in marathon times have come largely from the , but the Pro Evo 3 wraps carbon technology around the midsole rather than embedding a rigid . The approach protects while shaving overall weight. “We were measuring things down to the nearest nanogram,” said Patrick Nava, Adidas' VP of running, who alluded to a development process that, in his words, “genuinely changes what a race-day shoe can feel like.” A wider release is expected later this year, when the shoes will retail at £450.
Has Adidas dethroned Nike? When Kipchoge first cracked the sub-two hour mark in 2019, the American looked unassailable, and Kiptum's 2023 Chicago record only burnished its reputation. But boundaries are there to be pushed. Adidas can now claim that the fastest man and woman ever to race a marathon both wore its shoes — even as rivals such as Asics, Saucony, Hoka, Brooks and New Balance keep tweaking their own offerings. have struggled to the technology. World Athletics' 2022 regulations cap at 40mm and limit shoes to a single carbon plate; trainers exceeding those limits remain raceable, but their times no longer count. Nava admits he doesn't know if there is a ceiling, calling it “fun to .”
Yet shoes alone cannot explain the run. Two decades of advances in sports science have taught coaches how to and glycogen so that the body draws on carbohydrates rather than over 26.2 miles. Sawe spent 32 days across six trips with the hydrogel specialists at Maurten, learning to absorb 90–120g of carbohydrates per hour without distress. And almost inevitably, when are set, there are those who . Ruth Chepngetich, the 2024 Chicago champion, was a three-year doping ban in 2025. his countrywoman's suspension, Sawe and Adidas paid the Athletics Integrity Unit $50,000 to in the last year's Berlin marathon — a quiet acknowledgement that records, like shoes, never travel alone.
Questions
Check your understanding
- 01
Why does the writer say that Kipchoge's 2019 sub-two hour marathon was "not record-eligible"?
- 02
What does the writer most likely imply by closing the article with the line "records, like shoes, never travel alone"?
- 03
Considering the article as a whole, which of the following best describes the writer's stance on whether the Pro Evo 3 alone explains the new world records?
- 04
Argue whether the article treats the Adidas Pro Evo 3 as the main cause of Sunday's record-breaking results, or as one factor among several. Use specific evidence from at least three different paragraphs.
Suggested length: ~100 words
- 05
Assess the claim that the writer's decision to end on the Ruth Chepngetich doping ban undermines the celebratory tone of the rest of the article. Reference the article's structure and language in your answer.
Suggested length: ~100 words
Questions
Check your understanding
- 01
Why does the writer say that Kipchoge's 2019 sub-two hour marathon was "not record-eligible"?
- 02
What does the writer most likely imply by closing the article with the line "records, like shoes, never travel alone"?
- 03
Considering the article as a whole, which of the following best describes the writer's stance on whether the Pro Evo 3 alone explains the new world records?
- 04
Argue whether the article treats the Adidas Pro Evo 3 as the main cause of Sunday's record-breaking results, or as one factor among several. Use specific evidence from at least three different paragraphs.
Suggested length: ~100 words
- 05
Assess the claim that the writer's decision to end on the Ruth Chepngetich doping ban undermines the celebratory tone of the rest of the article. Reference the article's structure and language in your answer.
Suggested length: ~100 words