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.
DESIGNED FOR RUNNERS
Run far with a smaller-sized lightweight watch that fits comfortably and won't hold you back.
LIGHT AND SPORTY MATERIALS
The sweat-ready silicone band makes chafing a thing of the past.
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
The watch constantly samples your heart rate and will alert you if it stays too high or too low while you’re at rest. It also helps gauge how hard you work during activities.
Track where you run, and get accurate stats, including distance, pace and intervals.
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.
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.
While you’re out and about, Forerunner 45S tracks steps, intensity minutes and more.
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 features 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.
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