Garmin Forerunner 945 Owners Manual - Page 19

Data Storage The heart rate monitor can store up to 20 hours of data in a single activity. When the heart rate monitor memory is full, your oldest data is overwritten. You can start a timed activity on your paired Forerunner device, and the heart rate monitor records your heart rate data even if you move away from your device. For example, you can record heart rate data during fitness activities or team sports where watches cannot be worn. Your heart rate monitor automatically sends your stored heart rate data to your Forerunner device when you save your activity. Your heart rate monitor must be active and within range (3 m) of the device while data is uploaded. Caring for the Heart Rate Monitor NOTICE A buildup of sweat and salt on the strap can decrease the ability of the heart rate monitor to report accurate data. • Rinse the heart rate monitor after every use. • Hand wash the heart rate monitor after every seven uses or one pool swim, using a tiny amount of mild detergent, such as dishwashing liquid. NOTE: Using too much detergent may damage the heart rate monitor. • Do not put the heart rate monitor in a washing machine or dryer. • When drying the heart rate monitor, hang it up or lay it flat. Tips for Erratic Heart Rate Data If the heart rate data is erratic or does not appear, you can try these tips. • Reapply water to the electrodes and contact patches (if applicable). • Tighten the strap on your chest. • Warm up for 5 to 10 minutes. • Follow the care instructions (Caring for the Heart Rate Monitor, page 13). • Wear a cotton shirt or thoroughly wet both sides of the strap. Synthetic fabrics that rub or flap against the heart rate monitor can create static electricity that interferes with heart rate signals. • Move away from sources that can interfere with your heart rate monitor. Sources of interference may include strong electromagnetic fields, some 2.4 GHz wireless sensors, high-voltage power lines, electric motors, ovens, microwave ovens, 2.4 GHz cordless phones, and wireless LAN access points. The running dynamics accessory has an accelerometer that measures torso movement in order to calculate six running metrics. Cadence: Cadence is the number of steps per minute. It displays the total steps (right and left combined). Vertical oscillation: Vertical oscillation is your bounce while running. It displays the vertical motion of your torso, measured in centimeters. Ground contact time: Ground contact time is the amount of time in each step that you spend on the ground while running. It is measured in milliseconds. NOTE: Ground contact time and balance are not available while walking. Ground contact time balance: Ground contact time balance displays the left/right balance of your ground contact time while running. It displays a percentage. For example, 53.2 with an arrow pointing left or right. Stride length: Stride length is the length of your stride from one footfall to the next. It is measured in meters. Vertical ratio: Vertical ratio is the ratio of vertical oscillation to stride length. It displays a percentage. A lower number typically indicates better running form. Training with Running Dynamics Before you can view running dynamics, you must put on the HRM-Run™ accessory, HRM-Tri accessory, or Running Dynamics Pod, and pair it with your device (Pairing Your Wireless Sensors, page 29). If your Forerunner was packaged with the heart rate monitor, the devices are already paired, and the Forerunner is set to display running dynamics. 1 Select START, and select a running activity. 2 Select START. 3 Go for a run. 4 Scroll to the running dynamics screens to view your metrics. Running Dynamics You can use your compatible Forerunner device paired with the HRM-Tri accessory or other running dynamics accessory to provide real-time feedback about your running form. If your Forerunner device was packaged with the HRM-Tri accessory, the devices are already paired. 5 If necessary, hold UP to edit how the running dynamics data appears. Color Gauges and Running Dynamics Data The running dynamics screens display a color gauge for the primary metric. You can display cadence, vertical oscillation, ground contact time, ground contact time balance, or vertical ratio as the primary metric. The color gauge shows you how your running dynamics data compare to those of other runners. The color zones are based on percentiles. Garmin has researched many runners of all different levels. The data values in the red or orange zones are typical for less experienced or slower runners. The data values in the green, blue, or purple zones are typical for more experienced or faster runners. More experienced runners tend to exhibit shorter ground contact times, lower vertical oscillation, lower vertical ratio, and higher cadence than less experienced runners. However, taller runners typically have slightly slower cadences, longer strides, and slightly higher vertical oscillation. Vertical ratio is your vertical oscillation divided by stride length. It is not correlated with height. Heart Rate Features 13