energy lows are of our own doing – caused by those late nights or too much caffeine – but the conductor of our energy levels is a cluster of cells that lie deep within our brains, directing our daily release of hormones, our shifts in body temperature and our blood pressure. This conductor produces what are called ‘circadian rhythms’.
Research has shown that one of the most powerful regulators of our internal body clock or circadian rhythm is light. When photoreceptors in our eyes and other places absorb light, they send a signal to our brains to stop producing melatonin, the so-called sleep hormone. With light comes a cessation of melatonin production, and our gradually increasing body temperature makes us feel alert. During the day our temperature fluctuates, rising in the mid-morning, hitting a low at around 3 p.m. and then rising again in mid-afternoon; this could explain why we often get a second wind around this time. By 11 p.m., when the lights are usually turned off, melatonin production starts and temperature, heart rate and blood pressure drop in preparation for sleep.
It’s important to understand the physical rhythms that guide our days so we can learn to make the most of energy peaks and prepare ourselves for energy troughs. One way to keep track is to have an energy diary and write down the times when you feel alert or tired during the day. Once you are aware of your ‘downtime’, you can plan your life accordingly. For example, if you get a slump at around 3 p.m. you can avoid planning meetings at that time – or use some of the instant pick-me-up tips on pages 175–89. If, however, you find that your energy is constantly low or that you have more troughs than peaks during the day, your energy levels are lower than they should be.
Symtoms of low energy
Symptoms of low energy vary from person to person. In general when your energy is low, although you may be able to cope with your normal routine, you’ve lost that spring in your step and anything that requires a little more effort tires you quickly. You may often simply wake up tired and just have a general feeling of being out of sorts.
To rate your energy levels, answer the following questions:
☐ When you wake up in the morning, do you drag yourself reluctantly out of bed?
☐ Do you find yourself longing for an afternoon nap in the morning?
☐ At the end of the day, is slumping in front of the TV all that you want to do?
☐ During meetings do you easily become distracted or bored, or find it hard to keep your eyes open?
☐ Do you sometimes feel that you haven’t got the energy to get through the day?
☐ Do you fall asleep the moment your head hits the pillow?
☐ Do you often feel so wound up that it is hard to get to sleep?
☐ Does seeing or talking to friends seem like a huge effort sometimes?
☐ Is it hard to remember things or to concentrate at work?
☐ Do you find yourself getting worked up or impatient about the smallest things?
☐ Do you need caffeine or other stimulants to help you through the day?
☐ Are you susceptible to colds and other minor illnesses?
☐ Do you find it difficult to raise much enthusiasm for doing anything at all?
☐ Is it hard for you to accept or deal with change?
☐ Has it been a few weeks since you had a good laugh?
If you have ticked more than two boxes, this suggests that your energy levels are lower than they should be.
The causes of low energy: energy-drainers
Low energy is a concept that’s hard to define. Everyone will have their own idea of what being tired means, and we all feel tired once in a while; but if you feel that you have lost some of your zest for life, your energy levels are lower than they should be and you need to find out why.
Identifying what is causing your energy to dip is important because once you know what is robbing you of your vitality, you can then take steps to avoid it or manage it positively.
In most cases there is not one single cause that contributes to low energy, but a combination of several factors. Listed below are some of the most common energy-drainers including poor-quality sleep, unhealthy eating, lack of exercise, environmental factors, stress and underlying medical conditions. Review the information and use it to help you recognise your most common energy-drainers so that you can make positive changes to your diet and/or lifestyle, or seek medical advice. Then you are all set to re-energise yourself by cultivating the energy-boosting advice from page 41 onwards.
Sleep deprivation
Not getting a good night’s sleep is a common reason for low energy during the day. Between 7 and 8 hours of quality sleep a night is what most people need. Anything less than that and your immune system and your body’s battery-boosting systems suffer. This can lead to poor concentration, erratic judgement, slow reaction times, memory problems and poor physical performance, as well as mood swings and irritability.
Your sleep–waking cycle is regulated by the stimulus of sunrise and sunset, but a frantic and unhealthy lifestyle can upset your body clock, causing sleeping problems, fatigue and chronic sleep deprivation. It is certainly possible to train yourself to get by on less sleep, but during sleep both body and brain are restored, rejuvenated and re-energized. So why would you skimp on such a valuable energy-boosting resource? To find out if you are getting enough quality sleep, do any of the following apply to you?
Needing an alarm clock to wake up.
Falling asleep within 5 minutes of getting into bed.
Trouble getting out of bed in the mornings.
Drowsiness during the day and especially around 4 p.m..
Dozing off while watching TV, after a heavy lunch, or in a public place such as a meeting or at work.
Excessive yawning.
Need for caffeine and stimulants to get through the day.
If two or more items on this list apply to you, this suggests a lack of good-quality sleep. You should pay particular attention to the good sleep advice on pages 42–56.
Unhealthy diet
A well-balanced, healthy diet is essential for high energy levels. At its most basic level, what you eat and drink is the fuel that your body and brain need to function at their peak. Skimp on the quality of that fuel and you will pay the price with weight gain and low energy. Skipping breakfast, not drinking enough water, over-eating, dieting, eating on the run, consumption of caffeine and alcohol and eating a lot of refined, processed foods are the major causes of low energy levels.
Rate your diet
Do you eat breakfast every morning?
Do you eat at least 2,000 calories each day, mostly comprised of healthy, freshly prepared whole foods?
Do you grab a piece of fruit and a handful of nuts and seeds instead of a bar of chocolate to fight your midday doldrums?
Do you limit yourself to fewer than three cups of coffee every day?
Do you drink six to eight glasses of fluid every day (colas and coffee don’t count!)?
Do you make sure you eat something every couple of hours?
Do you sit down and take your time when you have a meal, chewing your food thoroughly?
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