Kelly M

[Kelly M @kj_marshall]

#SDinthefield @SDGameFishParks
Not every year that Christmas feels like opening weekend! ☀️

[College GameDay @CollegeGameDay]

I mean who doesn't love Peter 🤷

[Boston Marathon @bostonmarathon]

Our very first #MedalMonday since #MarathonMonday 🦄🏅✨

#Boston129 #MeetTheMoment #MomentMet

📸 Stew Milne

[David Dack @DavidDack]

Worried running will wreck your knees?

Science says the opposite.

Lifelong runners tend to have healthier joints in old age than people who don’t move.

Your body’s built to adapt.

Use it—or lose it.

[Boston Marathon @bostonmarathon]

2️⃣9️⃣ days until it's go time.🦄😏

#Boston129 #MeetTheMoment #BostonMarathon

[Kelly M @kj_marshall]

say it louder, for the people in the back 💨 @co_sell + @rrcundy

[Brady Holmer @Brady_H]

What's the key to a fast marathon? A lot of "slow" miles.

According to a new study analyzing 151,813 marathon performances, how runners distribute their training intensity is a key predictor of race-day performance.

The study examined training logs from runners of all levels, grouping them by marathon finish time.

Using a three-zone intensity model, researchers categorized workouts as:

- low-intensity (Zone 1; below lactate threshold)
- moderate-intensity (Zone 2; between lactate threshold and critical speed)
- high-intensity (Zone 3; above critical speed)

They analyzed how much time runners spent in each zone in the 16 weeks leading up to the race and how that related to their marathon performance.

Here’s what they found:

- Faster runners (finishing in 2–2.5 hours) trained three times more than slower runners, averaging 107 km (66 miles) per week.

- The top performers spent ~67% of their training time in Zone 1 (easy effort), while slower runners spent less time in this zone.

- The faster runners also followed a pyramidal training intensity distribution (Z1 > Z2 > Z3). This strategy, emphasizing high volume in Zone 1 with decreasing time in higher zones, was most common among the fastest athletes.

What hurts performance?

- Spending too much time in Zone 2 or Zone 3 was linked to slower marathon times.

The findings align with broader endurance research, showing that elite athletes rely on high training volumes (the “80/20 approach") combined with strategic high-intensity efforts to reach their peak.

[Kelly M @kj_marshall]

The women’s field : 🔥

[Boston Marathon @bostonmarathon]

ICYMI: The @BAA announced today that the professional open division for the 2025 Boston Marathon presented by @BankofAmerica will feature athletes from 20 countries, including Olympic medalists, Boston Champions, and top American talent.🤩👏

Full field at https://t.co/OBOaeyVUcb

[Paul TenHaken @paultenhaken]

Christmas Eve run with some really great friends. Thankful for The 437 Project community and the work these folks are doing to build awareness around suicide prevention in South Dakota.

[Chris Chavez @ChrisChavez]

On her Instagram story, Elle St. Pierre added: “As if I needed to say it: this is NOT a retirement announcement it’s a baby announcement 👏

Women can have kids AND a career. just watch 👏”

[Kelly M @kj_marshall]

Love this so much : @harpermurray4 ❤️

[sasha ౨ৎ @sushiskers]

harper on instagram

[Kelly M @kj_marshall]

Most expensive jacket I’ll ever own, right @co_sell ?! 🦄

[Boston Marathon @bostonmarathon]

Introducing the 2025 @adidasrunning Celebration Jacket

For the 129th Boston Marathon presented by @BankOfAmerica, @adidas & @BAA unveil a jacket that celebrates how the Boston Marathon represents each participant’s own 26.2-mile race.

Available 12/5 on https://t.co/1BSF0yY1AP

[Kelly M @kj_marshall]

SoDak, you’re my favorite 😍 #sdinthefield

[Kelly M @kj_marshall]

❤️

[Taylor Lewan @TaylorLewan77]

Seeing another man this emotional about his dog will bring anyone to tears.

You’re a good man @KirkHerbstreit

[Kelly M @kj_marshall]

#sdinthefield 🧡 @SDGameFishParks

[College GameDay @CollegeGameDay]

Get you a friend like @KirkHerbstreit 💯

[Kelly M @kj_marshall]

#sdinthefield 🫶🏼 not Jack-approved, but I really love these two pics and humans. Not so much the 🐶 yet but maybe eventually 😂. @SDGameFishParks

[Kelly M @kj_marshall]

@SDGameFishParks #SDintheField 😍

[Kelly M @kj_marshall]

Thanks @KELODanS for granting my wish! Can’t wait to see you tackle @437_the ! 🦬💛💙#the437project

[KELOLAND News @keloland]

12 teammates will soon run collectively across South Dakota to raise money for mental health resources in what is called the 437 Project.
https://t.co/YmI1Phpi22

[The 437 Project @437_the]

Our runners hit the road in only 5 days!

To follow our route and learn more about the project visit https://t.co/RUpWQFtXXK!

[Kelly M @kj_marshall]

I ❤️ 🌽 🏈 + @KirkHerbstreit

[Kirk Herbstreit @KirkHerbstreit]

.@HuskerFootball is a stock to buy RIGHT NOW 📈📈

#CollegeGameDay