# Should You Upgrade to the Garmin Forerunner 170? What the New Features Cost
The Garmin Forerunner 170 brings incremental improvements over the Forerunner 165, but the upgrade makes sense only for specific runners.
The key addition is Garmin's "training readiness" feature. This metric combines sleep quality, stress levels, heart rate variability, and recent training load to tell you whether your body is ready for intense exercise. The Forerunner 165 lacks this function entirely. For runners who train seriously and want data-driven guidance on when to push hard versus when to recover, this feature has real value.
The Forerunner 170 also offers modest hardware upgrades. The battery lasts slightly longer, the display is marginally brighter, and the watch responds faster to taps. These changes feel incremental rather than transformative. Both watches track running metrics competently: pace, distance, cadence, heart rate, and workout history work identically between models.
Pricing matters here. The Forerunner 165 sells for roughly $200, while the Forerunner 170 runs about $280 to $300. That $80-100 gap represents the cost of training readiness and minor performance tweaks.
Your decision hinges on training philosophy. Casual joggers and recreational runners see minimal benefit. The Forerunner 165 delivers everything needed to log miles, track splits, and monitor fitness gains. Serious runners following structured training plans find more value. The training readiness score helps optimize rest days and prevents overtraining. It's useful if you've experienced burnout or plateaus.
One caveat: training readiness is only as good as the data you feed it. The watch needs consistent sleep tracking and regular training to generate accurate scores. Inconsistent use diminishes its