A practical guide for UK runners
running vest phone holder for interval training
For interval training, a running vest phone holder should be checked through changes of pace, not only while standing still. The Défi vest has a zipped chest pocket and adjustable waist.
Purchase, availability and delivery details are shown on Amazon UK.

Défi running vest · UK guide
running vest phone holder for interval training
Guide / 01
Try the set-up at different paces
Put a correctly sized phone in the 20 × 13cm chest pocket, close the zip and try a short jog before faster repeats. Notice whether the loaded vest shifts or distracts you.
Guide / 02
Keep recovery transitions simple
Set the phone and any small essentials in their pockets before the session. The two 10 × 5cm shoulder pockets are compact, so avoid overfilling them between efforts.
Guide / 03
Do not assume bounce-free performance
No bounce-free rating is specified. Adjust the waist within 26–40in and use a different carry option if the vest does not feel secure at your training pace.
Good to know
Questions, answered.
Will the phone stay still during fast intervals?
That depends on fit, device and movement. No bounce-free result is guaranteed; test the loaded vest at a safe pace first.
Keep exploring
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