Forerunner 45S Black 010-02156-12

A Running Watch That Won’t Weigh You Down

Forerunner 45S is the smaller-sized GPS running watch with all the running-related features you need in a sleek, lightweight smartwatch you’ll want to wear all day and night.

Heart rate icon

Monitors heart rate at the wrist1, because a finger on the pulse is so old school.

For concrete proof that you crushed it, GPS tracks pace, distance, intervals and more.

Get yourself on the road to glory with free Garmin Coach adaptive training plans.

Say goodbye to missed texts with smart notifications2 delivered right to your wrist.

We’ve got your back with built-in incident detection and assistance features3.

Log more kilometers between charges with up to 7 days of battery life.

Garmin Coach

These adaptive training plans feature guidance from expert coaches and free training plans that adapt to you and your goals. Workouts sync right to your watch.

Built-In Sports Apps

Switch up your workout routine with activity profiles for cycling, treadmill running, indoor track, elliptical, cardio, yoga and more.

Wrist-Based Heart Rate

Get heart rate data1 along with alerts if your heart rate stays high while you’re at rest. Even gauge how hard your heart is working during activities.

Built-In Gps

Track where you run, and get accurate stats, including distance, pace and intervals.

Battery Life

Run to your heart’s content with up to 7 days of battery life in smartwatch mode and up to 13 hours in GPS mode.

Stress Tracking

Find out if you’re having a calm, balanced or stressful day. Relax reminders will even prompt you to do a short breathing activity.

Body Battery Energy Monitor

Track your body’s energy levels so you can find the best times for activity and rest.

Fitness Tracking

While you’re out and about, Forerunner 45S tracks steps, floors climbed, intensity minutes and more.

Smart Notifications

Receive emails, texts and alerts right on your watch when paired with a compatible smartphone.

Safety And Tracking Features

If you feel unsafe or if your watch senses that an incident occurred, assistance and incident detection features3 send your location to emergency contacts.

Connect Iq Store

Download custom watch faces, add data fields, and get apps and widgets from the Connect IQ Store.

Music Controls

Easily control the music playing on your phone, so you can skip songs without missing a beat.

Syncs With Garmin Connect

Upload your activities to the Garmin Connect app to interact with a thriving online community where people on the go can connect and compete — and even share their triumphs via social media.

1 Activity tracking accuracy

2 When paired with a compatible smartphone

3 When paired with a compatible smartphone For safety and tracking features requirements and limitations, see Garmin.com/safety.