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Garmin Forerunner 45S Specifications, Features and Price

$139.99

Date Released

April, 2019

Display

1.04 inches | 208 x 208px

Body

Polycarbonate | 32g(45S)/36g(45)

Memory

200 hours of activity data

Battery Life

7 days

Compatibility

Editor's Rating

Last updated on January 12, 2023 9:22 pm
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The Garmin Forerunner 45S is a lightweight fitness-focused smartwatch that’s designed to help you reach more fitness goals. The Forerunner 45 is available in two sizes; a bigger 45 and smaller 45S. The difference comes in the sizes 39mm vs 42mm and each of these two is well equipped with lots of fitness tracking features that allow you to track and manage your active life effortlessly.

The Forerunner 45S has a 1.04 inch transflective LCD display that’s easy to read outdoors, although not so colorful. It’s not a touchscreen device, so you’ll have to depend on the 5 physical buttons that no doubt makes it easy to navigate.

This watch will keep connected to all that matters to you as well as being able to control music on your phone, find your phone and watch. The battery life is great, you can go up to 7 days from a single charge and about 13hrs with continuous GPS tracking.

READ: detailed review of the Forerunner 45/45S

Garmin Forerunner 45S Activity Tracking Features

 Garmin Forerunner 45S

SMART FEATURES

Connect IQ (Downloadable watch faces, data fields, widgets, and apps)Yes
On-device Connect IQ storeNo
Text response/reject phone calls with text (Android only)No
CalendarYes
WeatherYes
Real-time settings sync with Garmin Connect™ mobileNo
Battery saver - customizable low power watchNo
Controls smartphone musicYes
Plays and Control Watch MusicYes
Find my phoneYes
Find my watchYes
Virb remoteNo

HEALTH MONITORING FEATURES

Wrist-based Heart Rate trackingYes
Daily resting heart rateYes
Abnormal heart rate alertYes (high and low)
Respiration Rate (24/7)Yes
Fitness AgeYes
Blood oxygen (SpO2) monitoringNo
Battery energy monitorYes
Stress trackingYes
Relaxation remindersYes
Relaxation breathing timerYes
Sleep monitoringYes
Advanced sleep tracking/Sleep ScoreYes
Menstrual cycle trackingNo
Hydration trackingNo
Health SnapshotNo

SAFETY AND TRACKING FEATURES

LivetrackYes
Group LivetrackNo
Live event sharingYes (Android only)
Incident detection during select activitiesYes (smartphone required)
AssistanceYes (smartphone required)
Spectator Messaging (New)No
Assistance Plus (New)No

TACTICAL FEATURES

Stealth modeNo
Night vision modeNo
Dual Grid CoordinatesNo
Kill switchNo

ACTIVITY TRACKING FEATURES

Steps CounterYes
Move bar (displays on device after a period of inactivity; walk for a couple of minutes to reset it)Yes
Auto goal (learns your activity level and assigns a daily step goal)Yes
Sleep monitoring (monitors total sleep and periods of movement or restful sleep)Yes
Calories burnedYes
Floors climbedNo
Distance travelledYes
Intensity minutesYes
TrueupYes
Move IQ

Yes

GYM & FITNESS EQUIPMENT

Available gym activity profilesCardio, elliptical training, stair stepping and yoga may be added through app
Cardio workoutsNo
Strength workoutsNo
HIIT workoutsNo
Yoga workoutsNo
Pilates workoutsNo
On-screen workout animationsNo
Automatic rep countingNo
On-screen workout muscle mapsNo

TRAINING, PLANNING & ANALYSIS FEATURES

GPS speed and distanceYes
Customizable data pagesYes
Customizable activity profilesYes
Auto PauseYes
Interval trainingYes
Improved interval (Includes open repeats, intervals data page, rest screen and auto detection) (New)No
Advanced workoutsYes
Downloadable training plansYes
Power modes - customizable in-activity battery settingsNo
Auto lapYes
Manual lapYes
Rest timer (New)No
Configurable lap alertsNo
Heat and altitude acclimationNo
VO2 Max. (Run)Yes
VO2 Max. (Trail run)No
Real-Time staminaNo
Training status (lets you see if you're training effectively by tracking your training history and fitness level trend.)No
Training load (your total training load for the last 7 days calculated from estimated epoc)No
Training load focusNo
Training effect (aerobic)No
Training effect (anaerobic)No
Primary Benefit (training effect labels)No
Improved Recovery Time (New)No
Daily Suggested Workouts (New)No
Custom alertsNo
Audio promptsYes
Finish timeNo
Virtual partnerNo
Race an activityNo
Auto multisport activitiesNo
Manual multisport activitiesNo
Course guidanceNo
Garmin Live SegmentsNo
Strava Live SegmentsNo
Round-Trip course creator (running/cycling)No
Trendline Popularity RoutingNo
Touch and/or button lockYes
Hot keysNo
Auto scrollNo
Activity history on watchYes
Physio TrueupYes

HEART RATE TRACKING FEATURES

HR zonesYes
HR alertsYes
HR caloriesYes
% HR max.No
% HRRNo
Recovery timeNo
Auto max HRNo
Morning report (New)No
Race glance/widget (New)No
HRV status (New)No
Training readiness (New)No
HRV stress test (measures your heart rate variability while standing still, for 3 minutes, to provide you with an estimated stress level; the scale of this is 1 to 100; low scores indicate lower stress levels)No
HR broadcast (broadcasts HR data over ANT+ to paired devices)Yes
Respiration rate (during exercise)No

RUNNING FEATURES

Available run profilesRunning, treadmill running and Indoor track running (may be added through app)
GPS-based distance, time and paceYes
Running dynamicsNo
Vertical oscillation and ratio (the degree of 'bounce' in your running motion and the cost-benefit ratio with stride length)No
Ground contact time and balance (shows how much time, in the running motion, your foot is on the ground rather than in flight and lets you check your running symmetry)No
Stride length (real time)No
Cadence (provides real-time number of steps per minute)Yes
Running power (New)No
Performance condition (after running 20 minutes, compares your real-time condition to your average fitness level)No
Lactate threshold (through analysis of your pace and heart rate, estimates the point where your muscles start to rapidly fatigue)No
PacePro pacing strategiesNo
Run workoutsYes
Race predictorNo
Course and weather-specific race predictor (New)No
Foot Pod CapableYes
Run/Walk/Stand detectionNo

GOLF FEATURES

Preloaded with 42,000 courses worldwideNo
Yardage to F/M/B (distance to front, middle and back of green)No
Yardage to layups/doglegsNo
Measures shot distance (calculates exact yardage for shots from anywhere on course)No
Digital ScorecardNo
Custom targetsNo
Stat tracking (strokes, putts per round, greens and fairways hit)No
Garmin AutoshotNo
Full vector mapNo
Auto Courseview updatesNo
Green view with manual pin positionNo
Hazards and course targetsNo
PinpointerNo
Playslike distanceNo
Touch-targeting (touch target on display to see the distance to any point) (New)No
Handicap scoringNo
Truswing compatibleNo
Round timer/odometerNo
Automatic club tracking compatible (requires accessory)No
Tournament LegalNo

OUTDOOR RECREATION

Available outdoor recreation profilesNo
Point-to-Point navigationNo
Bread crumb trail in real timeNo
Back to startNo
TracbacKNo
Ultratrac ModeNo
Around me modeNo
Up aheadNo
Elevation profileNo
Distance to destinationNo
Barometric trend indicator with storm alertNo
ClimbPro ascent plannerNo
Trail run auto climbNo
Vertical speedNo
Total ascent/descentNo
Future elevation plotNo
Preloaded Topographical mapsNo
Preloaded road and trail maps (New)No
Preloaded Ski resort mapsNo
Downloadable cartography supportNo
Compatible with BasecampNo
GPS coordinatesNo
Sight 'N GONo
Area calculationNo
Hunt/fish calendarNo
Projected waypointNo
Sun and moon informationNo
Xero locationsNo
Expedition GPS activityNo
TidesNo

CYCLING FEATURES

Available cycling profilesBiking and Indoor biking (may be added through app)
Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories)Yes
CoursesNo
MTB Grit & FlowNo
Cycle map (routable cycling-specific street map)No
Bike lap and lap maximum power (with power sensor)No
Race an activityNo
FTP (Functional Threshold Power)No
Compatible with Vector (Power Meter)No
Power Meter compatibleNo
Advanced cycling dynamicsNo
Compatible with Varia Vision (head-mounted display)No
Compatible with Varia Radar (Rear-Facing Radar)No
Compatible with Varia LightsNo
Speed and cadence sensor support (with sensor)Yes

SWIMMING FEATURES

Available swim profilesNo
Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories)No
Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories)No
Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only)No
Drill logging (pool swim only)No
Basic rest timer (up from 0) (pool swim only)No
"Repeat on" rest timer (pool swim only) (New)No
Auto rest (pool swim only) (New)No
Time and distance alertsNo
Pacing alerts (pool swim only) (New)No
Countdown start (pool swim only)No
Pool swim workoutsNo
Critical swim speed (New)No
Underwater wrist-based heart rateNo
Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim)No

Garmin Forerunner 45S Prices

ABOUT DEVICE

ABOUT DEVICE

Device name

Garmin Forerunner 45S

Device type

Fitness/Sport smartwatch

Gender

Unisex

Predecessor

Garmin Forerunner 35

Successor

Garmin Forerunner 55

Models

Garmin Forerunner 45, Garmin Forerunner 45S

Date released

April, 2019

DISPLAY

DISPLAY

Display size

1.04 inches

Display type

LCD, Memory-in-pixel (MIP), transflective

Resolution

208 x 208 pixels

Pixel density

Customizable watchface

Yes

Input type

(not touchscreen), 5 Physical buttons

Always-On

Yes

BODY

BODY

Shape

Circular

Case material

Fiber-reinforced polymer

Strap material

Silicone

Bezel material

Fiber-reinforced polymer

Strap size

20 mm

Color

Purple, White

Screen protection

Dimension

39.5 x 39.5 x 11.4 mm

Weight

32 grams

Waterproof rating

Yes, 5ATM

Swim-proof

Yes

Durability test

CONNECTIVITY

CONNECTIVITY

Bluetooth calling

No

Bluetooth

ANT+, Bluetooth

Wi-Fi

No

NFC

No

MEMORY

MEMORY

RAM

ROM

Memory card slot

No

CELLULAR CONNECTIVITY

CELLULAR CONNECTIVITY

Network technology

None

SIM type

None

NOTIFICATIONS

NOTIFICATIONS

SMS alert

Yes

Calls alert

Yes

Email alert

Yes

Event reminder

Yes

MEDIA

MEDIA

Audio

No

Microphone

No

Loudspeaker

No

Bluetooth music

No

Camera

No

SENSORS

SENSORS

GPS

Galileo, GLONASS, GPS

Accelerometer

Yes

HRM

Yes

Gyroscope

No

Pulse Ox.

No

Altimeter

No

Barometer

No

Compass

No

ECG

No

Thermometer

No

Ambient light

Yes

HEALTH & FITNESS TRACKING

HEALTH & FITNESS TRACKING

Steps

Yes

Calories

Yes

Distance

Yes

Heart rate monitoring

Yes

Sleep tracking

Yes

Floors climbed

No

Blood oxygen

No

Blood Pressure

No

Stress

Yes

ECG tracking

No

Fall detection

Yes

Menstrual cycle

No

VO2 Max

Yes

Onscreen workout

No

Preloaded sport modes

Yes

BATTERY

BATTERY

Battery type

non-removable Lithium-polymer

Battery capacity

Battery life

GPS mode: 13hrs, Smartwatch mode: 7 days

Charging type

Charging dock

Charging duration

1-2 hours

Solar power

No

PLATFORM

PLATFORM

Operating system

Proprietary OS

Chipset

CPU

GPU

MISCELLANEOUS

MISCELLANEOUS

Companion app

Garmin Connect

Compatibility

Android, iOS

Payment system

None

Customizable strap

20mm, Yes

Voice Assistant

No

Find my phone

Yes

Box content

Charger, Garmin Forerunner 45S, Manual, Straps

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