The power output sensor has been designed for use with the CS600 computer. This works by measuring power from the chain. Most sensors measure from the crank. This product is far more accurate because of two factors. Chain Tension (using a sensor on the chain stay) & Chain Speed (using a sensor on the rear pulley). ...

For recreational athletes. Get all the essential heart rate features with this good-looking & simple-to-use training computer. RS300X is compatible with S1 foot pod™ & G1 GPS sensor, so you can combine heart rate with speed & distance. Only then you can truly make sense of your training & be sure it's worth all the effort. * Helps you to train at the right intensity with personal training zones * Displays how many calories you've burned * Tracks your latest 16 training sessions & your last 16 weeks of training * Transfers training data to polarpersonaltrainer.com with optional Polar Flow Link™ ...

Perfect for the Multisport user & serious runner.... The G1 GPS can be used for any outdoor sport with speed from 1mph to 123 mph. Get all the essential heart rate features with this good-looking & simple-to-use training computer. RS300X is compatible with S1 foot pod (NOT Included) & G1 GPS sensor (INCLUDED), so you can combine heart rate with speed & distance. Only then you can truly make sense of your training & be sure it's worth all the effort. Helps you to train at the right intensity with personal training zones Displays how many calories you've burned Tracks your latest 16 training sessions & your last 16 weeks of training Transfers training data to polarpersonaltrainer.com with optional Polar Flow Link. ...

For an active endurance athlete. You want to improve your performance between training routines
- by planning, monitoring & analysing
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You demand more information & analytical feedback. You want to shave off minutes & seconds from your personal best with proper training planning. RS400sd is your system for planning; monitoring & analysing your running. With daily information on your aerobic fitness & running economy; RS400sd meets your needs as an active runner with racing aspirations. Comes with the same running features as RS400; plus detailed speed/pace & distance tracking. Compatible with Polar Training Plan Bank. ...

R-R Intervals / Online HR Variability Measures your heartbeat intervals & reflects autonomic nervous system activity in heartbeat regulation. The R-R interval measurement is most useful at rest & at low intensities. Relaxation rate indicates the state of your physical recovery. Running Index (optional
- only with S3 or G3 sensors) Based on heart rate & speed data measurement during the run. Running Index is based on heart rate & speed data measured during the running exercise. It gives daily information about the runner's performance level, both aerobic fitness & running economy. Improvement in running efficiency indicates enhanced economy of running performance. Polar Fitness Test™ with Own Index® Measures your fitness level in 5 minutes. A fitness test that measures your aerobic/cardiovascular fitness at rest in just five minutes. The result, Polar Own Index, predicts your maximal oxygen uptake (V02max). With the Polar Fitness Test you can measure your aerobic fitness by yourself, automatically & without any exertion. No other equipment other than a heart rate monitor is needed. The Polar Fitness Test is as accurate in predicting the VO2maxas any sub-maximal fitness test. The test is based on gender, age, height, body weight, level of physical activity, heart rate & heart rate variability at rest. The Own Index ranges usually from 20 to 95 & is comparable to VO2max, the golden standard of aerobic fitness. Own Index is most meaningful when following changes in your fitness over a long period of time. Find out how fit you are for your age & gender by comparing your result to the global references listed in the Polar user's manuals. Interval trainer (hr, pace distance) guided workouts Create your personal multizone workouts with heart rate / speed / distance & timing guidance. means that you can create & name your own favorite workouts based on time, heart rate, speed/pace or distance guidance with up to three linked timers or distances & up to three target zones. Polar sport zones Helps you to train at the right intensity. Polar sport zones provides an easy way to select & monitor the intensity of your training & to follow Polar's sport zones based training programs. The 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) & maximum (90-100% HRmax). Zone Pointer Makes it easy to stay in your target zone. A visible & moving symbol on the display of your Polar product indicating that you are inside the pre-set target zone. Zone Lock Simply the easiest way to set a target zone. You can activate a target zone with a press of a button during your run. You can also deactivate the zone alarm just as easily
- by pressing a button. Event Countdown Timer Set your goal & stay motivated. Keeps your motivation high by showing how many days are left before your next running event (e.g. Berlin 23 days)

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For those who are seriously into their running, the RS800CX Run helps to plan, monitor & analyze every part of your training. Its range of personal training zones means you can train at the right intensity, & with advanced features, that come along with the s 3 stride sensor W.I.N.D., you'll be able to track your progress with running index as well as stride length & running cadence. ...

The Polar S1 foot pod combines inertial technology & DSP (digital signal processing) to provide accurate speed/pace & distance data. Excellent water resistance. Polar S1 foot pod is included with RS200sd, RS400sd, S625x, & is available as an option with RS200 & RS400. ...

S3+ stride sensor comes in black with a new, firm shoe attachment which guarantees accurate speed & distance measurement. This small & lightweight sensor measures each stride you take, helping you analyze the effectiveness & efficiency of your run. Measures running speed/pace & distance Helps improve running technique by telling your running cadence & stride length Determines your Running Index, which tells you about your running performance. Shock & water resistant, handling even the most demanding runs. ...

Just because the months are getting colder & darker, doesn't mean your training needs to stop. The Sleeve Topper keeps you going, enabling you to wear your Polar product on top of your long-sleeved cold weather training gear. So, it's easy to see, hear & operate, but it also keeps you safe & visible to cars & vehicles thanks to its bright 360-degree safety reflector. ...