Brooks Glycerin 23

Who Are Brooks Glycerin 23 For?

The Glycerin 23 is for neutral runners who want a plush, do-everything daily trainer for easy miles, recovery days, and steady long runs. It suits beginners building mileage comfortably and experienced runners who log high weekly volume and value soft landings over snappy turnover. If you're chasing race-day speed or want a firm, responsive ride, look elsewhere in the Brooks lineup.

Feelings and Experience

Underfoot it feels soft and cushioned, with a noticeably plush heel that swallows impact and a slightly firmer forefoot that keeps you from sinking too far. Transitions are smooth and unhurried rather than propulsive — this is a shoe that rewards a relaxed cadence, and when you try to push the pace the foam gives back comfort more than energy. The trade-off is honest: the medium rebound means it can feel a touch dead if you're expecting a springy pop.

Performance Specs

• Drop: 8mm heel-to-toe offset — a moderate height difference that balances heel comfort with a natural forefoot feel

• Cushioning: Very high, DNA Tuned nitrogen-infused foam — larger heel cells for soft landings, smaller firmer forefoot cells for a bit of response

• Responsiveness: Medium — plateless and comfort-tuned, so softness does not translate into high snap

• Stability: Moderate — a neutral shoe with a broad, planted platform but no dedicated pronation support

• Pace: Optimal for 5:30–6:30 min/km (8:51–10:27 min/mile)

Best Distances and Maximum Speed

It genuinely excels at 10K, half marathon, and marathon distances run at conversational effort, plus everyday easy and long training runs, with the sweet spot being relaxed long miles. Its fastest effective zone is around 5:00 min/km (8:03 min/mile); push quicker and the soft foam starts to feel vague rather than efficient.

Technologies and Materials

The midsole is Brooks' new DNA Tuned nitrogen-infused foam, tuned with zoned cell sizes and no plate. A premium triple-jacquard warp-knit upper wraps the foot with a comfortable, breathable hold. Lab measurements put the stack at roughly 37 mm heel / 29 mm forefoot, weighing about 303 g in a men's US 9 — on the heavier side, which reinforces its everyday-comfort rather than fast-day purpose.

Comparisons with Other Shoes

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