emWave Personal Stress Reliever- from HeartMath
Also see The StressEraser - the only hand-held biofeedback system registered with the FDA of America with an indication for stress reduction.
The emWave Personal Stress Reliever provides a portable and convenient way to reduce stress, balance emotions and increase performance. This scientifically validated, handheld stress reliever uses colorful LED displays, audio feedback and a powerful stress relief technique to help you significantly reduce your stress and increase your feelings of well-being
How emWave PSR Works
The emWave is based on hard science and shows the effects of stress on your body by measuring the subtle changes in your heart rhythms. This type of measurement is known as heart rate variability analysis or HRV. The analysis of HRV is recognized as a powerful, non-invasive measure that reflects heart-brain interactions and autonomic nervous system dynamics, which are particularly sensitive to changes in emotional state.
However, emWave does a lot more than just show the effects of stress on your body. It reduces stress by training you to create more “coherence.” Coherence is a term used by scientists to describe a highly efficient physiological state in which the nervous system, cardiovascular, hormonal and immune systems are working efficiently and harmoniously. Coherence is a state very similar to what athletes experience when they are in what is called “The Zone”.
Heart Rhythms and Coherence
When you experience stressful emotions such as tension, anxiety, irritation, or anger, your heart rhythm pattern becomes irregular and incoherent, which negatively affects health, brain function, performance and your sense of well-being (see the graph below).

Figure 1: heart rhythms when stressed
When you are experiencing positive emotions such as appreciation, care, joy or love, your heart rhythm pattern becomes more ordered and coherent. (See graph below.)

Figure 2: heart rhythms when feeling a positive emotion
Ordered and harmonious heart rhythms are an indicator of your “coherence level”. High coherence is a state associated with positive emotional attitudes which send signals to the brain that reduce stress, improve brain function, hormonal balance, immune response, coordination and reaction times. emWave PSRdetermines the degree of coherence found in your heart rhythm patterns and displays changes in real-time on a large tri-colored LED--the Coherence Level Indicator.
- A red light indicates low coherence which would be normal.
- A blue light indicates medium coherence which shows good improvement
- A green light indicates high coherence the optimal high performance, stress-free state.
The goal in using emWave is to reduce stress by achieving and sustaining High Coherence (green). The Coherence Coach CD (included) provides instruction on how to do the Quick Coherence™ Technique to improve your coherence scores with emWave.
How to use emWave PSR
Simply place your thumb on the sensor or attach the Ear Sensor. After your pulse is detected a breathing pacer which synchronizes to your heart rhythms begins. As you practice the Quick Coherence Technique, breathing with the pacer while at the same time activating a positive feeling like the care you have for someone or the appreciation you have for the good things in your life, your coherence level (indicated in a large colorful LED) will begin to change from red to blue to green.
emWave PSR offers four challenge levels to help you sharpen your coherence building skills. You can change the brightness of the LED displays and the audio feedback level. Additionally, it incorporates an accumulated coherence scoring display so you can track your progress during a session and an advanced user mode.
For most people in today's high stress world, it is rare for sustained periods of coherence to occur. Now with emWave Personal Stress Reliever you have a convenient, practical way to help you reduce stress and shift into a higher state of coherence anytime, anywhere. Your stress will diminish and your feelings of well-being, balance and enhanced energy will increase.
The emWave Quick Coherence® Technique

emWave will teach you how to enter a coherent state in about a minute with the simple, but powerful steps of the Quick Coherence® Technique.
Using the power of your heart to balance thoughts and emotions, you can achieve energy, mental clarity and feel better fast anywhere.
Use Quick Coherence® especially when you begin feeling a draining emotion such as frustration, irritation, anxiety or anger. Find a feeling of ease and inner harmony that's reflected in more balanced heart rhythms, facilitating brain function and more access to higher intelligence.
More coherent heart rhythms facilitate brain function, allowing you more access to your higher intelligence so you can improve your focus, creativity, intuition and higher-level decision-making. When you're in heart-rhythm coherence, you perform at your best - what athletes call being "in the zone". You feel confident, positive, focused and calm, yet energized.
What is Included
- emWave Personal Stress Reliever unit
- Ear sensor
- Carrying case
- Battery recharger
- Coherence Coach CD
- emWave owners manual
- Quick Start guide
- Jump Start card
emWave Unit Specifications:
- Size: 85mm x 55mm x 14mm or 3 3/8” wide, 2/1/8” high, 9/16” deep
- Weight: 2.2 ounces
- Internal rechargeable Lithium Ion battery
- Superbright LED light bar and display indicators
- Finger sensor and two-way, finger-operated control button
emWave Personal Stress Reliever (silver)
Price including free 'Next Day' UK delivery: £149
emWave Personal Stress Reliever (blue)
Price including free 'Next Day' UK delivery: £149
Also see The StressEraser - the only hand-held biofeedback system registered with the FDA of America with an indication for stress reduction.
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