Anta Zone 2 Heart Rate 90 "Heartbeat" 112625579-4 - Super Trainer Running Shoe Unisex White Red Silver
Feel your rhythm. Own your zone.
The Anta Zone 2 Heart Rate 90 "Heartbeat" is the premier flagship launch colorway of ANTA's highly popular unplated super trainer series — styled in a striking White, Crimson Red, and Metallic Silver palette. Built to bridge the gap between top-tier marathon racing technology and everyday aerobic conditioning, this is the shoe that started it all.
Zone 2 training — 60%–70% of maximum heart rate — is where coaches agree elite aerobic bases are built. The Zone 2 90 is engineered to make those miles feel effortless, session after session.
The Design Story: The Rhythm of Running
- The Inspiration: The "Heartbeat" name plays on a dual meaning — the technical precision of heart-rate training and the physical lifeblood of long-distance running.
- ECG Wave Graphic: An organic visual wave mimicking an electrocardiogram (ECG/EKG) pulse line runs seamlessly across the mesh upper — a nod to the controlled intensity of Zone 2 effort.
- Crimson Accents: Bright red splashes across the midsole and heel structure symbolize the rush of oxygen and blood flow during peak performance.
- Metallic Silver Overlays: Premium silver detailing adds a distinct race-day shimmer that sets this colorway apart from the rest of the Zone 2 lineup.
Sizing & Fit
- Normal to Narrow Feet: True to Size (TTS) — order the exact same US size you wear in Nike, New Balance, Brooks, or ASICS. Midfoot lockdown is secure with a slip-free heel cradle.
- Wide Feet or In-Between Sizes: Size up a half size. The AT-Fiber upper has almost zero mechanical stretch or elasticity. Though the toe box is rounded, it tapers into a rigid front bumper — sizing up ensures room for toe splay during long, hot runs when feet naturally swell.
Midsole: Supercritical NitroEdge 90 Foam
A massive single slab of full-length NitroEdge 90 — ANTA's nitrogen-infused compound with ultra-low density and 90%+ energy return. It delivers an incredibly soft, fun, and bouncy ride that effortlessly absorbs shock on hard asphalt. Easy days have never felt this rewarding.
Stability: Plateless Nylon Shank
Instead of a rigid carbon fiber plate that causes calf tightness and clunkiness at recovery paces, ANTA installs an extended midfoot nylon shank. It provides structural rigidity under the arch and checks unwanted foot twist while allowing a natural, rolling foot flexion — the ideal setup for high-volume aerobic training.
Weight: Featherweight Construction
At just 188–191 grams (Men's US 9/9.5), it is lighter than almost any trainer in its cushioning class. It feels completely nimble and invisible on foot — the kind of shoe you forget you're wearing until you check your splits.
Upper: AT-Fiber Lock Mesh
A highly technical AT-Fiber matrix mimics a racing-tier single-layer mesh, holding the foot securely over the footbed with precise midfoot lockdown. Note: the Nitro90 foam's extreme softness can feel slightly unstable for severe overpronators or during intense 3+ hour runs.
Outsole: Anti-Wear Rubber (AWR)
AWR rubber delivers incredible, squeaky friction on dry pavement. Best suited for dry conditions — traction drops on slick, rain-soaked asphalt, so plan your routes accordingly.