Wearables and Apps-How to Track Your Body

Do you want to know how to trach your body? Using wearables and apps on your phone can be helpful to monitor the body’s response to stress or training throughout the day. Although blood and salivary tests are available and genuinely more accurate in measuring stress responses through cortisol levels, these are not practical on a daily basis. The information from apps and wearables can also provide an incredible source of data for your doctor during a GP Consultation or Health Screening.

Monitoring Blood Pressure

High blood pressure is the most important risk factor for deaths worldwide. It is the cause of more deaths than smoking. Over half of adults over 45 have high blood pressure. In the clinic blood pressure can be a little above the ideal. This is often the case when people come to the doctors’ surgery. We term this “white-coat hypertension.” A useful way around this is to monitor home blood pressure readings. This provides us with substantially more data to use. 

• When checking blood pressure ensure that you have been sitting quietly for 5-10 minutes. 
• Rest your arm on a table, desk or arm rest. 
• Ensure that the blood pressure cuff is applied snuggly to the upper arm at the approximate level of the heart. 
• Take the best of three readings. 
• Try to check the blood pressure every day at different times of day for 2 weeks. 
• Many, but not all people with high blood pressure benefit from reducing salt from their diet. It is particularly important to avoid processed foods and ready meals which often have a high salt content. Reducing the intake of refined sugar is also important in blood pressure reduction. 

Here is a list of blood pressure monitors that have been validated for home use: http://bhsoc.org/bp-monitors/bp-monitors/for-home-use/

Many of our patients use the QardioArm device which syncs wirelessly with your smartphone and then you can email me the readings directly. Even better is the Aktiia device which can be worn continuously: https://aktiia.com/uk/

Monitoring Mood

A basic way to measure response to stress or training is to record self-perceived measures of mood sleep quality, stress and energy levels. The app iMood Journal (https://itunes.apple.com/us/app/imoodjournal/id517952128?mt=8) can be useful for this but in my opinion can be impractical at times.

Monitoring Sleep

In addition to mood, sleep quality is another important measure and the app Sleep Cycle is useful for this (https://itunes.apple.com/au/app/sleep-cycle-alarm-clock/id320606217?mt=8).

Dr Lucy’s favourite wearable is the Fitbit Charge 3 which gives insight into daily activity, tracks heart rate and gives feedback on sleep quality all in one (https://www.fitbit.com/uk/charge3).

Monitoring Heart Rate

In addition to these parameters, we also know that heart rate variability, the beat to beat variation in heart-beat, can provide a direct indication of the body’s stress levels and activation of parasympathetic (rest and recovery) and sympathetic (flight and flight) nervous systems. Generally, the wider the variation in HRV the better and narrower HRV can be due to stress or under recovery. There are several ways to monitor this in which the optimum is on a continuous basis. A few of products that do this and give feedback on stress levels and sleep quality include:

Oura ring (this is probably the best): The Ōura ring senses body temperature pulse heartrate variability and activity. It can give insights into sleep quality and recovery. Remarkably, that this data is gathered with a reasonably stylish rain. https://ouraring.com/.

Whoop wristband: The Whoop wristband also get great feedback on resting heart rate body temperature pulse heartrate variability and activity. The manufacturers have also created an online community and podcast to help users optimize the experience. https://whoop.com/

Garmin vivosmart: the Garmin watch allows users to facilitate the GPS tracking that Garmin devices are famous for as well as giving estimates of VO2 max https://buy.garmin.com/en-GB/GB/p/571520

The idea of these devices is that they give you the requisite nudge to ensure that you take proactive measures to reduce stress and increase recovery on days when your heart rate variability is low and the feedback from the device suggests that stress levels are high.

Dr Hugh Coyne
GP, Fulham