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Home . Heart Rate Monitors . By Sport . Monitors for Runners . Polar RS300X Running Computer Heart Rate Monitor Black 90036619
Polar RS300X Running Computer Heart Rate Monitor Black 90036619
  • Polar RS300X Running Computer Heart Rate Monitor Black 90036619
  • Polar RS300X Running Computer Heart Rate Monitor Black 90036619
  • Polar RS300X Running Computer Heart Rate Monitor Black 90036619
  • Polar RS300X Running Computer Heart Rate Monitor Black 90036619
  • Polar RS300X Running Computer Heart Rate Monitor Black 90036619
  • Polar RS300X Running Computer Heart Rate Monitor Black 90036619
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Polar RS300X Running Computer Heart Rate Monitor Black 90036619

Reg Price $149.95Savings! $60.95 (41%)
$89.00
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Color: BlackIn Stock
  • Polar RS300X Running Computer Heart Rate Monitor (Orange)
  • Polar RS300X Running Computer Heart Rate Monitor (Black)

Basic Features
  • Automatic lap recording
  • Time and distance interval timers
  • Distance measurement
  • Speed/Pace tracking for maximum, current, and average speeds
H1 Transmitter Strap Size
Qty
Replacement Battery for Polar RS300X Running Heart Rate ComputerReplacement Battery for Polar RS300X Running Heart Rate Computer $7.95
Replacement Battery for Polar H1 Heart Rate Sensor TransmitterReplacement Battery for Polar H1 Heart Rate Sensor Transmitter $7.95
Polar H2 Heart Rate Monitor Transmitter SetPolar H2 Heart Rate Monitor Transmitter Set $54.77
Chest Strap Size Options:
Polar H7 Bluetooth Smart Chest Transmitter 92044305Polar H7 Bluetooth Smart Chest Transmitter 92044305 $56.99
Polar T31 Coded Chest Transmitter and Elastic Strap 920135Polar T31 Coded Chest Transmitter and Elastic Strap 920135 $38.99
Chest Strap Size
Polar S1 Foot Pod 91027204Polar S1 Foot Pod 91027204 $89.99
Polar Flowlink Data Transfer Unit 91032834Polar Flowlink Data Transfer Unit 91032834 $42.30
Polar Universal Handlebar Bike Mount 91026028Polar Universal Handlebar Bike Mount 91026028 $11.49
Polar Replacement Soft Transmitter StrapPolar Replacement Soft Transmitter Strap $16.95
Size Choices:
buh-bump Heart Rate Electrode Cream (2.5 oz. tube)buh-bump Heart Rate Electrode Cream (2.5 oz. tube) $8.49
Spectra 360 Electrode Conductivity Gel (8.5 ounce tube)Spectra 360 Electrode Conductivity Gel (8.5 ounce tube) $4.95
If you’ve been searching for a running computer that can offer you all of the important training data you need to design a smarter training plan, look no further than the Polar RS 300X. This Polar heart rate monitor is designed for recreational athletes who want essential heart rate and timing features in their monitors.

The Polar RS 300X features:
  • Automatic lap recording
  • Time and distance interval timers
  • Distance measurement
  • Speed/Pace tracking for maximum, current, and average speeds
  • EnergyPointer, for letting you know if your workout is burning fat or improving fitness
  • Polar Fitness Test, for measuring your aerobic fitness level
  • Polar Sport Zones, with ZoneLock and ZonePointer, to guide you in your training
  • Interval trainer guided workouts based on time, heart rate, speed/pace, or distance
  • HeartTouch, button-free operation
The RS 300 Series of Polar heart rate monitors helps you train at the right intensity by giving you personal sport zones for you to work with. It’s like having your own trainer or coach to guide you toward your fitness goals. Available in Orange or Black.

In The Box:
  • Polar RS300X training computer
  • Polar H1 heart rate sensor
  • RS300X Getting Started Guide

Body measurement features:
  • Automatic age-based target zone (bpm / %)-To help you train safely and effectively, the training computer determines your heart rate target zone limits automatically according to your age-based maximum heart rate (220 minus age). The limits are determined either in beats per minute (bpm), as a percentage (%) of your maximum heart rate, or as a heart rate reserve (% HRR). See also Maximal oxygen uptake (VO2max) and Manual target zone.
  • Average and maximum heart rate of each lap
  • Average and maximum heart rate of training
  • Heart rate (bpm / %)- Heart rate is the measurement of the work your heart does. Heart rate can be expressed as the number of beats per minute (bpm) or as a percentage (%) of your maximum heart rate.
  • HR-based target zones with visual and audible alarm- You can define your target zones for a training session based on heart rate to help define the right intensity. When you are out of the preset zones, the training computer will give a visual and audible alarm.
  • HRmax (age-based)The highest number of heart beats per minute (bpm) during maximum physical exertion. For a rough estimate of your maximum heart rate, subtract your age from 220. HRmax is a useful tool for determining the intensity of training as intensity zones can be defined using HRmax. Some Polar products define maximum heart rate during the Polar Fitness Test, see also HRmax (Polar Fitness Test -based).
  • HRmax (user set)
  • Manual target zone (bpm / %)- This feature enables you to define the target zone as you want and is suitable for your training. You can set the target zone for your training as beats per minute (bpm), as a percentage of your maximum heart rate, or as a percentage of your heart rate reserve (HRR%).
  • Polar Fitness Test- Polar Fitness Test measures your aerobic fitness at rest in just five minutes. The result, Polar OwnIndex, evaluates your maximal oxygen uptake (VO2max). With the Polar Fitness Test you can measure your aerobic fitness by yourself, automatically and without any exertion. All you need is your training computer. The Polar Fitness Test is as accurate in predicting the VO2max as any sub maximal fitness test. The test is based on heart rate and heart rate variability at rest and personal information.
  • Polar OwnCal (calorie expenditure)- Polar OwnCal calculates the number of kilocalories expended during training. This feature allows you to follow the kilocalories expended during one training session and cumulative kilocalories expended during several training sessions. Some Polar products also estimate the fat-burning percentage (fat% on display), that is, kilocalories expended from fat during a workout which is expressed as a percentage of the total kilocalories burned.
  • Polar OwnCode (5kHz) coded transmission- Coded heart rate transmission automatically locks in a code to transmit your heart rate to the training computer. The training computer picks up your heart rate from your transmitter only. Coding prevents interference from other training computers.
  • Polar OwnZone (personal heart rate zone)- Polar OwnZone determines your personal heart rate limits for a training session. Depending on the day and time, your physical state may vary, for instance, if you are stressed or tired, or if you are not fully recovered from your latest training session, Polar can determine that information from your heart rate and guide you to your ideal training zone for that moment.
  • Polar sport zones- Polar sport zones provide an easy way to select and monitor the intensity of your training and to follow sport zones based training programs. Training is divided into five zones based on percentages of your maximum heart rate: very light (50-60%HRmax), light (60-70%HRmax), moderate (70-80%HRmax), hard (80-90%HRmax) and maximum (90-100%HRmax).
  • Training load (available via polarpersonaltrainer.com)- This feature is available in Polar software. When you transfer training results from your training computer to polarpersonaltrainer.com, you can follow your training load and recovery in the training diary. Continuous monitoring of training load and recovery will help you recognize personal limits, avoid over- or undertraining, and adjust training intensity and duration according to your daily and weekly targets
Data transfer
  • Compatible with Mac (Intel-based) via Polar FlowLink
  • Compatible with PC via Polar FlowLink
  • Compatible with polarpersonaltrainer.com via Polar FlowLink
G1 GPS sensor features: (optional accessory)
  • Distance (training, lap, and total)- Distance (km, mi) can be set and measured in several ways. Training distance tells you the distance traveled during a training session. Trip distance tells you the distance from the latest trip reset. Lap distance tells you the distance of one lap. Total distance is the distance accumulated since the last reset. Odometer tells you the cumulative distance which you cannot reset.
  • Speed-based target zones with visual and audible alarm- You can define your target zones for a training session based on speed. When you are out of the preset zones, the training computer will give a visual and audible alarm.
  • Speed/Pace (current, average and maximum)- Speed (km/h or mi/h) is measured with GPS, footpod, stride sensor or cycling speed sensor. Pace (expressed as min/km or min/mile) stands for the rate of speed. Pace is usually used in running. By setting a target pace, you can follow how fast you need to run in order to reach a certain distance in a predefined time.
Polarpersonaltrainer.com features:
  • Training analyzing
  • Training diary- Diary is available in Polar software. When you transfer training results from your training computer to your Diary, you can easily follow up your training as well as plan your future training sessions. You can choose to see your training sessions in a Month or Week view, along with a Month or Week summary.
  • Training Load- This feature is available in Polar software. When you transfer training results from your training computer to polarpersonaltrainer.com, you can follow your training load and recovery in the training diary. Continuous monitoring of training load and recovery will help you recognize personal limits, avoid over- or under-training, and adjust training intensity and duration according to your daily and weekly targets.
  • Training programs- The polarpersonaltrainer.com web service offers training programs for running, cycling, outdoor sports, and general fitness, for instance. The training program creates training targets which appear in your Diary. You can customize the program according your current fitness level.
Recording features:
  • Totals- Totals includes your training data starting from the last reset enabling you to follow your long-term training.
  • Training files (with summaries) 16
  • Weekly history- Weekly history gathers your weekly training data. By selecting a week, you can review your training data for the week.
S1 footpod features (optional accessory):
  • Distance (training, lap, and total)- Distance (km, mi) can be set and measured in several ways. Training distance tells you the distance traveled during a training session. Trip distance tells you the distance from the latest trip reset. Lap distance tells you the distance of one lap. Total distance is the distance accumulated since the last reset. Odometer tells you the cumulative distance which you cannot reset.
  • Speed/Pace (current, average and maximum)- Speed (km/h or mi/h) is measured with GPS, footpod, stride sensor or cycling speed sensor. Pace (expressed as min/km or min/mile) stands for the rate of speed. Pace is usually used in running. By setting a target pace, you can follow how fast you need to run in order to reach a certain distance in a predefined time.
  • Speed/Pace-based target zones with visual and audible alarm- You can define your target zones for a training session based on speed. When you are out of the preset zones, the training computer will give a visual and audible alarm.
Training features:
  • Automatic lap recording- With this feature you can set your training computer to take laps based on preset distance, for example, every 1 km/mi.
  • Display zoom- Display zoom feature allows you to zoom in information on the display during training.
  • Graphical target zone indicator- This feature points out graphically on the display the zone you are in during a training session helping you to stay on the desired intensity zone.
  • HeartTouch (button-free operation of wrist unit)- When HeartTouch is on, different training information during training can be accessed without pressing buttons, for instance, when gloves make pressing buttons difficult, by bringing your training computer close to your transmitter.
  • Interval trainer guided workouts (heart rate / pace / distance)- Create interval guided workouts based on time, heart rate, speed/pace or distance guidance with up to three linked timers or distances and up to three target zones.
  • Number of laps = 99
  • Time and distance based interval timers- Use timers, for example, as a training tool in interval training to tell you when to switch from a harder to a lighter period and vice versa. The timers can be time- or distance- based.
  • User configurable displays (two lines)- This feature allows you to configure training computer displays to show the information that you need during your training session. Configure the displays either in the training computer or in ProTrainer 5 software.
  • ZoneLock- ZoneLock feature helps you to accumulate certain intensity. You can either lock a zone before a training session or during it by pressing a button when you are on the desired zone.
  • ZonePointer- ZonePointer is a visible and moving symbol on the training computer display indicating whether you are inside the pre-set target zone. This feature helps you to reach the desired intensity/pace/speed/cadence targets.
Watch features:
  • Backlight
  • Date and weekday indicator.
  • Display text in English, German, French, and Spanish
  • KeyLock- By activating KeyLock, training computer buttons are locked, and accidental presses do not cause problems, for instance, during training.
  • Time of day (12/24h) with alarm and snooze
  • Water resistant 50m

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