Brian Rock – Medium

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Brian Rock
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Runner's Life

How Do You Compare Race Results Between Age Groups?

The promise of and problems with the age grading system

9 min readJan 31, 2024

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How Do You Compare Race Results Between Age Groups?

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Brian Rock

A Deep Dive Into Marathon Data

Recently, I saw a post on Reddit the sparked some great conversation. Have marathoners really gotten slower over the last twenty years?

5 min readAug 24, 2023

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A Deep Dive Into Marathon Data

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Brian Rock
in
Runner's Life

The History of the London Marathon Told by the Data

How have the field and finish times at this race changed through the years?

10 min read2 days ago

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The History of the London Marathon Told by the Data

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Brian Rock
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Running with Rock

Jersey City Marathon Training: The Week After — Running with Rock

This week started with the Jersey City Marathon.

6 min read6 days ago

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Jersey City Marathon Training: The Week After — Running with Rock

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Brian Rock
in
Runner's Life

The 2024 Boston Marathon By the Numbers

What happens to the best marathoners when the weather doesn’t cooperate?

11 min readApr 19, 2024

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The 2024 Boston Marathon By the Numbers

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Brian Rock
in
Running with Rock

Race Report: Flying Too Close to the Sun at the Jersey City Marathon

The best laid plans of mice and men … aren’t worth crap if you don’t follow them.

15 min readApr 15, 2024

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Race Report: Flying Too Close to the Sun at the Jersey City Marathon

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Brian Rock
in
Running with Rock

JC Marathon Training Week 14: Wrapping Up and Planning Out the Race

And just like that, it all comes to an end.

7 min readApr 13, 2024

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JC Marathon Training Week 14: Wrapping Up and Planning Out the Race

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Brian Rock
in
Runner's Life

Percentiles and Z Scores for Marathon Performances From Updated 2023 Performance Data

Are these alternative methods better or worse than traditional age grading?

13 min readApr 11, 2024

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Percentiles and Z Scores for Marathon Performances From Updated 2023 Performance Data

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Brian Rock
in
Running with Rock

JC Marathon Training Week 13: Starting the Taper While On the Road

Exploring the rivers and lakes around Minneapolis, Minnesota

12 min readApr 11, 2024

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JC Marathon Training Week 13: Starting the Taper While On the Road

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Brian Rock
in
Running with Rock

Jersey City Marathon Training Week 12: Finishing Strong and Starting to Taper

At the end of last week, I got some bad news. The race I’d been hoping to run as a tune up for the Jersey City Marathon — the Spring…

10 min readMar 30, 2024

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Jersey City Marathon Training Week 12: Finishing Strong and Starting to Taper

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Brian Rock

Brian Rock

I'm an avid runner, focusing on longer distances like the marathon. I also enjoy being out on the trails, walking my dog, and making beer. And I'm a data nerd.

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