Garmin Venu 4 Review: What Endurance Athletes Need to Know

The Garmin Venu 4 sits in a specific spot in Garmin's lineup: a lifestyle-forward AMOLED watch that still carries serious health and fitness tracking under the hood. It targets athletes who want something they can wear to work and then straight to a track session, without switching to a Forerunner or Fenix.
On the fitness side, the Venu 4 packs Garmin's latest Elevate v5 optical heart rate sensor, HRV Status, Body Battery, and running dynamics when paired with a chest strap or footpod. GPS accuracy sits in a similar range to the Forerunner 165, which is solid for road running and casual trail use. Don't expect the multi-band precision of a Forerunner 965 or Fenix 8 though.
Battery life is the clearest trade-off versus sport-first watches. You get around 5 days in smartwatch mode with the AMOLED always-on display active, or up to 8 days with it off. A Coros Pace 3 laughs at those numbers, and even a Polar Vantage V3 pushes further. For daily training blocks this is fine, but multi-day events or back-to-back long rides will force a charge mid-week.
Where the Venu 4 pulls ahead of pure fitness trackers like Whoop 4.0 or Fitbit Sense 3 is the built-in GPS and the full Garmin Connect ecosystem. You get structured workout support, Garmin Coach plans, and real sport profiles. It is not a replacement for an Apple Watch Ultra 2 on the smartwatch side or a Forerunner 265 on the running side. It lives between them.
Solid choice for endurance athletes who want one watch for everything and train mostly on roads. Not the tool for serious tri or ultra prep.