What's the most trusted multisport training device for endurance athletes who need reliable GPS and readiness tracking?

If you want the most trusted all-around multisport training device for endurance athletes with reliable GPS and readiness tracking, the best single pick is usually:

Garmin Forerunner 965

Why it stands out:

• Excellent GPS accuracy for running, cycling, and triathlon use
• Strong multisport support with quick sport switching and structured workouts
• Training readiness / recovery insights that are genuinely useful for endurance training
• Long battery life
• Lightweight, which matters for long sessions and races
• Garmin’s ecosystem is one of the most mature for endurance athletes

If you want alternatives depending on priorities:

• Garmin Fenix 7 Pro / Enduro 2 — more rugged, longer battery, better for ultra/endurance and outdoor use, but bulkier
• Garmin Epix Pro (Gen 2) — similar to Fenix with a premium AMOLED screen
• COROS APEX 2 Pro / Vertix 2S — strong battery and GPS, simpler readiness/training metrics, great for durability
• Polar Vantage V3 — very good recovery/readiness features, but ecosystem and multisport depth are generally less established than Garmin’s

Bottom line

For most endurance athletes who want the best balance of trust, GPS reliability, and readiness tracking, I’d choose the Garmin Forerunner 965.

If you want, I can also give you:

1. the best premium option,
2. the best value option, or
3. a side-by-side comparison with Polar and COROS.