How The Over 35s Should Use Complex Carbohydrates - Professor Greg Whyte

July 21, 2018

How The Over 35s Should Use Complex Carbohydrates - Professor Greg Whyte

In this article two-time Olympian and  Professor of Sports Science Greg Whyte explains why we should avoid excessive consumption of simple sugars, adapt a periodisation approach to our nutrition and focus on complex carbohydrates for improved performance and long term health benefits.

Sugar has recently become Public Enemy No.1. Whilst this could be seen as a media obsession to pin falling public health on a single source, there is some truth in the potentially harmful effects of excessive sugar consumption.



The deleterious effects of excessive sugar consumption impact on both health, including links to obesity and metabolic syndrome (increasing the risk of Type 2 diabetes & heart disease), and performance. In particular, excessive consumption of sugar (particularly simple sugars) can have a profoundly negative impact on health and performance as athletes age.

excessive consumption of sugar can have a profoundly negative impact on health and performance as athletes ageSugar is the generic name for sweet-tasting, soluble carbohydrates, many of which are used in food. There are various types of sugar derived from different sources. Simple sugars are called monosaccharides and include glucose, fructose, and galactose.

Combining these simple sugars results in disaccharides (2 simple sugars i.e. sucrose which is granulated sugar; maltose from malted grain; and lactose from milk). Longer chains of sugars are called oligosaccharides or polysaccharides (also known as ‘Complex Carbohydrates’).

The longer the chain of simple sugars the longer they take to break down. Of note, sugars provide no nutrition with the exception of energy (why they are often called ‘empty calories’).


Whilst there is a growing trend for ‘Fat Adaptation’ in endurance and ultra-endurance sport care is warranted in adopting a low/no carbohydrate diet during heavy, intensive training and competition. Sugars are not essential in our diet however, high intensity exercise (above the anaerobic threshold) relies heavily on carbohydrates for energy production.

Accordingly, an athletes diet should reflect the demands of the upcoming training session/event to ensure optimal performance. Periodising your diet, in a similar fashion to periodised training, will provide the appropriate fuel for the task at hand. This approach is even more important for the older athlete, particularly in terms of sugar.

Biological and physiological changes as we age can lead to glucose intolerance; and insulin insensitivity. Furthermore, Type 2 diabetes is common in later life. Accordingly, the type, timing and volume of carbohydrate ingestion is important for the older athlete to avoid a range of common problems with excessive simple sugar consumption including: gastro-intestinal discomfort (i.e. bloating, nausea, diarrhea); poorly regulated blood glucose levels; and weight gain. Importantly, excessive simple sugar consumption can be deleterious to health as well as performance.

The focus should be on complex (slower release) carbohydrates rather than simple (rapid release) sugars.Ensuring optimal energy availability is crucial for the older athlete however; the focus should be on complex (slower release) carbohydrates rather than simple (rapid release) sugars.

Periodising nutrition to ensure adequate complex carbohydrate ingestion at meal times combined with targeted sports nutrition providing high quantities of complex carbohydrates, will help optimize training and competition performance whilst better protecting health.

Take Home Messages:

  1. Avoid excessive consumption of simple sugars
  2. Periodised Nutrition can significantly improve health and performance in older athletes
  3. Complex carbohydrates rather than simple sugars should be the aim for the older athlete.


Elivar’s SUSTAIN PLUS and SUSTAIN GO! products are formulated around Isomaltulose, a slow release carbohydrate which delivers energy over a sustained period. This fuels the body for longer without the sugar spikes and elevated insulin levels associated with traditional sports nutrition, while also avoiding the stomach distress including cramps and bloating that result from rapid-absorption of sugary products.



Professor Greg Whyte OBE PhD DSc FBASES FACSM

Prof Greg Whyte is a two-time Olympian, Professor of Sport Science, Liverpool John Moores University  and has published over 200 peer reviewed papers and 8 books in the area of sport, exercise science and medicine . He is Performance Director, Centre for Health and Human Performance, Chair of UK Active Research Institute Scientific Advisory Board and Principal investigator for WADA. He has helped to raise over £35 million for Comic Relief and Sport Relief and is the best selling author of Achieve the Impossible.

Also in News

Long Covid Recovery - by Robin McNelis
Long Covid Recovery - by Robin McNelis

September 12, 2021

Robin McNelis, Clinical Specialist Physiotherapist (Cardiac and Respiratory) and long time Elivar customer, provides an insight into Long Covid and his remarkable journey from a 2:49 Marathon in 2019 to struggling with climbing stairs.

Robin also shares with us his path to recovery and his use Ubiquinol Plus and Sustain Plus as a source of co-enzyme Q-10.



Continue Reading →

Introducing SUSTAIN GO! - The World's First Sustained Release Energy Gel
Introducing SUSTAIN GO! - The World's First Sustained Release Energy Gel

May 31, 2020

SUSTAIN GO! - The World's First Sustained Release Energy Gel.

We never liked gels here at Elivar HQ

They were the epitome of unhealthy - a turbo charged sugar bomb designed to deliver as much sugar as possible into our blood stream. The result for many a marathon runner, cyclist or triathlete was stomach upset and cramps, bloating and the long term damage of repeat insulin spikes during exercise.


Continue Reading →

RECOVER | Recovery With Health Benefits
RECOVER | Recovery With Health Benefits

May 17, 2020

It's a fact - it takes longer to recover as we age. 

That doesn't mean we need to do less. It means we should pay more attention to the kinds of nutrients we're providing our body. If you're finding that it is getting a little harder to recover from your favorite session, it may be your recovery drink that needs to change - not the session!

Continue Reading →