Gel Kayano 31 vs Glycerin GTS 21

The Gel Kayano 31 is Asics at its most dependable: a premium stability running shoe built to soak up the miles and keep your stride honest when fatigue sets in. This is the shoe a lot of runners reach for when they want support without feeling strapped into a brace. The guidance built into the midsole works with you rather than against you, so the ride feels smooth and planted rather than corrective. At 310g it is a properly substantial daily trainer, so it is not the shoe for chasing splits, and the 10mm drop suits runners who land towards the heel. We rate it as one of the most polished stability daily trainers you can buy, and the cushioning has the kind of long run comfort that earns its place in your rotation. If you want a lighter, cheaper Asics with similar support, the GT-2000 14 is the value pick. At £170 the Kayano asks for a premium, so it has to be the support shoe you train in most weeks to justify it.

The Glycerin GTS 21 is Brooks' plush daily training shoe with a layer of gentle support built in. GTS stands for Go To Support, so this is the stability sibling of the neutral Glycerin 21: same soft, high-cushion ride, but with guide rails that quietly hold your stride together when your form starts to wobble. At 289g with a 10mm drop, it is a substantial, protective running shoe rather than a light or fast one. That weight is the price of the cushioning, and it is aimed squarely at runners who value comfort and a bit of guidance over speed. We rate it as a soft-riding stability daily trainer for easy miles, long runs and everyday base training. If you overpronate mildly, want a max-comfort shoe that keeps you aligned, and are not chasing pace, it is one of the easiest shoes in this class to just put on and run.