Nigel Mitchell, Leading Performance Nutritionist May 05, 2016

Often in sport people search for those ‘marginal’ gains that may help performance but neglect some of the fundamental basics. Having good quality and sufficient sleep is critical for recovery and performance. Those of us with young children will understand how a lack of sleep affects us both emotionally and physically. Chronic sleep deprivation, 2-4 hours over a two-week period, will affect performance in the same way as going without sleep for 24 hours.

Why do we sleep?

Sleep is the body’s way of resetting and re-establishing the equilibrium. This is from a metabolic, hormonal and nervous system perspective. As with most things we are all individual and require different amounts of sleep to function optimally, but most people have a good idea of how much sleep they require. A good guideline for healthy adults is between 7 and 9 hours of sleep per night.

Are you getting enough sleep?

If you normally fall asleep within 20 minutes of going to bed and wake up naturally in the morning feeling refreshed, then you’re probably getting enough sleep. But if you find that you struggle to get to sleep and have restless nights then you may not be; paying attention to your sleep hygiene may help. Often athletes find that they sleep perfectly well for most of the time, but during competition when nerves start to set in, their sleep becomes disrupted.

In my experience of working with professional athletes, sleep is a topic that is often high on the agenda, more specifically the role that nutrition can play in aiding sleep. There are a growing number of products that are designed to help support sleep these include pillows, eye patches, lamps and nutrition supplements. However, before we look at how we can improve sleep it is important to understand the things that we do that are having a negative impact on sleep.

Sleep hygiene

Our sleep habits are often referred to as sleep hygiene. Many good sleep hygiene habits may seem like common sense, but it is surprising how often athletes overlook this and make simple mistakes that have a detrimental impact on the quality of their sleep. Below are some steps you can take to improve your sleep hygiene:

  1. Create a regular bed-time routine, we are creatures of habit, having a routine helps to prepare the mind and body for sleep.
  2. Avoid loud noises, this stimulates our sympathetic nervous system – our fight or flight response.
  3. Reduce light exposure before bed. Melatonin is a hormone that is produced by the pineal gland and is believed to regulate sleep. It is produced from amino acids such as tryptophan. Darkness acts as a stimulant for the production of melatonin and light reduces the body’s production.
  4. Switch off your tablet or computer. Alertness is stimulated mainly by light in the blue spectrum. Many tablets and computers now have settings that reduce this light. Special glasses have also been developed that cut out the blue light.
  5. Consider an eye mask, people often report that they wake up earlier in the summer months due to the early sunrise.
  6. Avoid alcohol, many people feel some alcohol can help with sleep, but in fact for most people it reduces sleep quality.
  7. Avoiding caffeine after 2pm. Many athletes consume a lot caffeine, this can be in the form tea, coffee and ‘energy’ products such as caffeinated gels and drinks. Caffeine can have a negative impact on sleep, this is probably because of the stimulation on the nervous system along with its diuretic effect.
  8. Emotional stress can affect our sleep, some people find practicing mindfulness can help sleep.

How can nutrition help?

There is not a great deal of scientific evidence behind the positive impact of nutrition on sleep, but the anecdotal evidence from athletes and members of the general population is extremely convincing. Whilst there is no doubt that some of the effects may be down to placebo, I have personally seen positive result when implementing the following nutrition interventions with the athletes that I work with:

  1. A bed time cup of chamomile tea and honey. Chamomile tea has long been used as a ‘calmer’ and relaxer. Honey is high in fructose this helps to maintain the liver glycogen which can get depleted over night while you sleep.
  2. The supplement 5 HTP (5-Hydroxytryptophan) is becoming a very popular nutritional sleep aid. It is used in the bodies production of serotonin and melatonin. There are few contraindications with 5HTP such as avoiding using it if an individual is also on anti-depressants.
  3. Cherry juice, (Montmorency) such as the juice found in Healthspan Elite Performance Cherry, contain melatonin. Many athletes have found this useful in helping with sleep.
  4. Taking zinc and magnesium at night is often used to support sleep.
  5. Casein protein, this comes from the old wives tail about a hot milky drink before bed. But actually having some casein (slow digested protein) can help some people with sleep and can have the added benefit of providing amino acids to the body, which can support muscle recovery.
  6. People are becoming more aware of the importance of sleep and this is never more true than for athletes. If you are concerned about your sleep some of the information provided here may be useful. Modern technology is also helping to provide support around sleep, many fitness watches and trackers can provide quantifiable data on the quantity and quality of your sleep.

    There are many factors that can affect sleep, if you are someone who suffers from poor sleep try making some of the changes suggested above and you will no doubt see an improvement in your sleep and performance.

Nothing beats a healthy, balanced diet to provide all the nutrients we need. But when this isn’t possible supplements can help. This article isn’t intended to replace medical advice. Please consult your healthcare professional before trying supplements or herbal medicines.

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