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Sportline® Duo 1025

Sportline® Duo 1025 - Men's

Your satisfaction is guaranteed, with our 30-day return privilege. We even email you a prepaid return label, to make exchanges easy, or if you would like a refund for any reason. All items ship to U.S. ZIP codes. (No sales tax outside California). Some items can be shipped to Canada. Look for the red maple leaf below, for those products that can be shipped from our Canadian warehouse.



  • Your Price: $89.95
  • Product SKU: SL001


"Sportline is a top-notch company with an outstanding line of products, which have been featured on MSNBC, The Today Show, and in Health Magazine among many others. We are now offering one of Sportline's newest, most advanced heart rate monitors: the Sportline Duo 1025 (comes in a men’s and women’s model).

What stands out about the Sportline Duo over other heart rate monitors, is that you can calculate your heart rate by merely placing your fingertip on the watch sensor, and the patented sensor will measure with EKG accuracy, even while you are in motion. Or, if you would like to continuously monitor your heart rate, the Sportline Duo comes with a chest strap transmitter that will provide you with a multitude of heart rate information throughout your workout.

The option to use the watch by itself or in conjunction with the chest strap is quite a nice feature. It is also water resistant to 50 meters, so you can wear it in the pool or shower without a problem. The watch is comfortable, very light weight, outputs plenty of personalized data on your heart rate, and manages to be one of the best-looking heart rate monitors as well." — Richard

The Sportline Duo 1025 is the perfect product for those who are avid exercisers, runners/swimmers, or individuals wanting to improve their overall level of health. Its advanced technology allows both continuous and on-demand heart rate monitoring. The set comes with a watch and a chest strap, and you have the option of using the watch by itself or in conjunction with the chest strap. The watch's large LCD, with Intellitrack Heart Rate Zone Display, makes it easy to continuously monitor your workout and exercise in your target heart rate zone.

Acquiring your heart rate
Finger touch: The watch has two heart rate sensors on the top and bottom of the watch dial. If you would like to get a heart rate measurement, you can place your index finger on either sensor and get a quick readout in beats per minute (BPM).

Chest strap transmitter: Using the chest strap is more practical if you would like more complete data. With the chest strap, you can attain data points throughout the entire workout. If the chest strap heart rate is captured, the finger touch heart rate will be disabled.

User profile
The Sportline Duo 1025 uses an advanced algorithm based on your user profile to estimate your maximum heart rate and calculate other heart rate information. To set your user profile, you enter your gender, year of birth, height, weight, and activity level.

Heart Rate/Exercise Timer mode
Losing weight and managing to keep it off is a lot easier when you exercise in your target heart rate zone. To get the most out of any exercise program, you should target 50% to 85% of your maximum heart rate depending on your fitness level and objectives.

The Sportline Duo 1025 automatically calculates your maximum heart rate from your user profile and uses this information to display heart rate zones. It allows you to select from 3 preset heart rate target zones (active, fat burn, and endurance) and 1 user-defined target zone.

Active Zone: 50% - 60% of maximum heart rate
This zone is ideal for fitness beginners on a low to moderate intensity program. Exercising in this zone reduces blood pressure and cholesterol.

Fat Burning Zone: 60% - 75% of maximum heart rate
Exercising in this zone strengthens the cardiovascular system and nearly all the calories burned are from fats.

Endurance Zone: 75% - 85% of maximum heart rate
Reaching this zone requires more intense aerobic activity and is perfect for fitness enthusiasts working to burn maximum calories from fat and carbohydrates. Cardiovascular strengthening, increased metabolism and elevated caloric burn are the primary benefits.

The heart rate/exercise timer mode tracks time IN, ABOVE and BELOW target zone during exercise. It also displays a detailed view of your average and maximum heart rate, fat burned, or calories burned.

Intellitrack Heart Rate display
The Intellitrack visual display allows you to view your current heart rate in relation to your target zone at a single glance. The outer edge of the display screen is marked with a scale running clockwise from 0-100 percent of maximum heart rate. The visual bars display the range of your selected target heart rate zone. A single segment displays your current heart rate in relationship to your selected zone.

Heart rate/exercise memory
The memory mode allows you to view detailed feedback from your last 7 workouts.


Sportline Duo 1025

Features Overview

  • On-demand heart rate (by finger-touch on watch) or continuous heart rate (from chest strap transmitter)
  • Easy-to-read large LCD on watch (with EL backlight system for viewing the display in low light conditions)
  • Intellitrack Heart Rate display to view your current heart rate in relation to your target zone at a single glance
  • 6 main operating modes:
    • Heart rate/exercise timer
    • Time
    • Dual time
    • Alarm
    • Chronograph
    • Countdown timer
  • 4 user-selected target heart rate zones
  • Percentage of maximum heart rate indicator
  • Fat burned and calories burned indicator
  • 7-workout memory
  • Power save and power down modes to conserve battery life
  • Water resistant to 5 ATM (can be worn during showering or light swimming*)
  • Watch functions:
    • Time:
      • AM, PM, hour, minute, second
      • 12/24 hour format
      • Calendar: month, date, day display with auto leap year adjustment
      • Dual time zone
    • Alarm:
      • Daily alarm
      • Alarm duration: 30 seconds
    • 24-hour, 100-lap Chronograph:
      • 1/100 second resolution
      • 9 hours, 59 minutes, 59.99 seconds
      • 100 laps
      • Lap/split memory recall from your previous workout
    • 24-hour countdown timer:
      • 1-second resolution
      • Range: 23 hours, 59 minutes, 59 seconds
  • One-year manufacturer's warranty

Technical Specifications

  • Heart rate range: 30-240 beats per minute
  • Calorie tracking range: 0-9999
  • Fat burn range: 0 - 1296g
  • Measures: 3" x 9.25" x 7" (7.6 cm x 23.5 cm x 17.8 cm)
  • Weighs: 6.2 oz (176 g)
  • Power: CR2032 battery (included)

Package Includes


*Please note: if you use the watch while swimming, please do not press the buttons while submerged as this might force water past the key seals and damage the unit.