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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

Jan 31, 2024

How Do You Compare Race Results Between Age Groups?

Jan 31, 2024

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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?

Aug 24, 2023

A Deep Dive Into Marathon Data

Aug 24, 2023

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Running with Rock

Summer Racing Season Week 3: Racing the Mile, or Trying To — Running with Rock

The first two weeks of this racing season have gone well enough. My recovery is on track, and my legs are feeling better.

5d ago

Summer Racing Season Week 3: Racing the Mile, or Trying To — Running with Rock

5d ago

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Running with Rock

Boston Qualifying Times and Hills Revisited: Data from Boston 2025 — Running with Rock

Last month, I published an analysis of the impact of downhill marathons on the Boston Marathon qualifying process.

6d ago

Boston Qualifying Times and Hills Revisited: Data from Boston 2025 — Running with Rock

6d ago

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Running with Rock

First Look at the New Garmin Forerunners 570 and 970

What’s New and Where Do They Fit In?

6d ago

First Look at the New Garmin Forerunners 570 and 970

6d ago

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Runner's Life

Inside the Training of the Top American at the Boston Marathon

A deep dive on Conner Mantz’s Strava profile

6d ago

Inside the Training of the Top American at the Boston Marathon

6d ago

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Running with Rock

Six Star Finisher Update After the 2025 London Marathon — Running with Rock

The London Marathon was about two weeks ago.

May 10

Six Star Finisher Update After the 2025 London Marathon — Running with Rock

May 10

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Runner's Life

May Update on the 2026 Boston Marathon Cutoff Time Projection

Does counting only unique finishers change the projection?

May 10

May Update on the 2026 Boston Marathon Cutoff Time Projection

May 10

Published in

Running with Rock

Summer Racing Season: Week 2 — A Step Closer to Normal — Running with Rock

At this point, I’m still easing back into training. My first couple of recovery weeks after Jersey City are done, and it’s time to start…

May 10

Summer Racing Season: Week 2 — A Step Closer to Normal — Running with Rock

May 10

Published in

Running with Rock

How Many Miles Do Elite Marathoners Run? — Running with Rock

We all know elite marathon runners run a lot. But exactly how many miles and hours do they put in during a typical week?

May 7

How Many Miles Do Elite Marathoners Run? — Running with Rock

May 7

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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