Garmin Forerunner 45S GPS watch

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.

BODY BATTERY® ENERGY MONITORING:

See your body's energy levels throughout the day so you can find the best times for activity and rest.

PULSE OX SENSOR:

The Pulse Ox sensor1 gauges your blood oxygen saturation during the day and as you sleep to show how well your body is absorbing oxygen.

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 when you're feeling stressed.

MENSTRUAL CYCLE TRACKING:

Use the Garmin Connect™ app to track your cycle, log physical and emotional symptoms and learn about training and nutrition during each phase of your cycle.

HYDRATION TRACKING:

Log your daily fluid intake as a reminder to stay hydrated. You can even have an auto goal for hydration that adjusts based on how much sweat you lose during activities.

RESPIRATION TRACKING:

See how you're breathing throughout the day, during sleep and during breathwork and yoga activities.

ADVANCED SLEEP MONITORING:

Get a full picture of how you're sleeping, with a breakdown of your light, deep and REM sleep stages as well as Pulse Ox1 and respiration data.

WRIST-BASED HEART RATE:

The watch constantly samples your heart rate2 and will alert you if it stays high while you're at rest. It also helps gauge how hard you work during activities — even underwater.

MINDFUL BREATHING:

When you want to relax or focus, you can start a breathwork activity, and this watch will track your stress and respiration to help you get a better understanding of how you're breathing.

ANIMATED, ON-SCREEN WORKOUTS:

Easy-to-follow, animated cardio, strength, yoga and Pilates workouts come preloaded on the watch, and you can download more from the Garmin Connect app.