BIG 21 MILE LONG RUN IN THE PUMA FAST-R 3! Full Week Of London Marathon Training

BIGGEST MILEAGE WEEK EVER! 21 Mile Long Run In The Puma Fast-R 3 (Full Week Of Marathon Training) - Welcome back to another full week of marathon training as I build towards London Marathon 2026. This week after testing the Puma Deviate Nitro Elite 4, I decided that it wouldn't be my marathon racing shoe of choice, so needed to start testing out the fast-r 3 over some longer distances.... so I gave it this weekends l...