Griff Duncan

What a 73 Mile Week of Marathon Training Looks Like as an Amateur Runner

Griff Duncan · 20K views · 11 days ago

Racing a 1:25 Half Marathon Mid Marathon Build

Griff Duncan · 3.8K views · 4 days ago

Can I Run Sub-40 in My First 10K? | Racing in the Middle of Marathon Prep

Griff Duncan · 5K views · 2 weeks ago

What a 65 Mile Week of Marathon Training Looks Like as an Amateur Runner

Griff Duncan · 7.7K views · 1 month ago

SUB-3 MARATHON BUILD | Ep.01 | Fifth Time's the Charm

Griff Duncan · 7.6K views · 1 month ago

How an Amateur Runner Trains for a Sub-3-Hour Marathon

Griff Duncan · 19K views · 1 month ago

How Long Can I Hold Sub-3 Marathon Pace on 4 Days' Notice

Griff Duncan · 2K views · 4 months ago

FULL DAY OF EATING | How I Fuel Sub-3 Marathon Training

Griff Duncan · 6.2K views · 1 month ago

Sub-3 Hour Marathon Attempt | Mesa Marathon 2026

Griff Duncan · 4.8K views · 7 months ago

Strength Training For Marathon Runners | Why You Need It

Griff Duncan · 8.1K views · 3 weeks ago

RELENTLESS | The Pursuit of 2:59

Griff Duncan and 2 more · 788 views · 1 month ago

I Finally Broke My Half Marathon Curse (But Made One Huge Mistake)

Griff Duncan · 1.4K views · 6 months ago

THE FINAL TEST Before My Sub-3 Marathon

Griff Duncan · 3.9K views · 7 months ago

Sub-3-Hour Marathon Build: EP. 07 - Go Again

Griff Duncan · 1.8K views · 1 year ago

Sub-3-Hour Marathon Build: EP. 10 - Embracing Monotony

Griff Duncan · 1.2K views · 1 year ago

My First Half Marathon – This Did NOT Go as Planned

Griff Duncan · 2.2K views · 1 year ago

QUALIFYING FOR THE BOSTON MARATHON | ep.01 - Setting the Stage #marathon #marathontraining

Griff Duncan · 5.5K views · 1 year ago

Sub-3-Hour Marathon Build: EP. 05 - Sidelined

Griff Duncan · 2.2K views · 1 year ago