1.Excess body weight
Your weight plays a large role in developing type 2 diabetes, especially if your extra weight is around your waist.
What is a healthy weight to aim for?
This is about working out your Body Mass Index (BMI). BMI uses your height and weight to work out if you're a healthy weight. You can work your BMI out for yourself using this NHS tool – it will show you your target range.
For many people living with obesity, aiming for a healthy BMI may not be realistic. Research shows that even losing just 5% of extra weight will improve your health. The more weight you lose, the greater the health benefits.
What is a healthy waist size?
BMI doesn’t look at how much fat you have around the middle. That is why you need to measure your waist too.
Healthy weight size all depends on your gender and ethnicity. For a healthy measurement you need to aim to be less than:
- 80cm (31.5in) for all women
- 94cm (37in) for most men
- 90cm (35in) for South Asian men.
This video from Diabetes UK shows you how to measure your waist size.
2. Physical activity
It is estimated that 1 in 3 women, and 1 in 4 men in the UK do not undertake enough activity to stay healthy.
It is recommended that we all undertake at least 150 minutes of moderate-intensity exercise, or 75 minutes of high-intensity exercise per week.
Being active can:
- Contribute to weight loss
- Increase the way your body uses insulin, reducing the period of time blood glucose levels remain high.
- Use fat for fuel in endurance exercise such as running or swimming. This reduces levels of fat around your waist.
Exercise videos
This playlist of short videos from Diabetes UK gives you lots of exercise options to choose from. They range from gentle arm and leg movements to dance and a full body workout.
3. Smoking
In the UK, 15% of people aged 18 years and over are said to be active smokers. This means that there are some 7.2 million active smokers that are putting themselves at risk of type 2 diabetes.
Smokers are estimated to be 30% to 40% more likely to develop T2DM than nonsmokers. Cigarette smoke has been found to contain more than 7000 harmful chemicals, many of which can decrease the effectiveness of insulin as a result of inflammation and damage cells as a consequence of oxidative stress.
Additionally, the nicotine from smoking can reduce the effectiveness of insulin, resulting in active smokers finding it harder to manage blood glucose levels.
If you have prediabetes or a previous diagnosis of gestational diabetes, you already have an increased chance of developing cardiovascular disease, such as a heart attack, stroke or circulatory problems in the legs.
Combine this with smoking and you make the chances of developing these diseases and their complications even higher.
Help to stop smoking
NHS inform provides a suite of support and resources to help you to stop smoking. This includes the Quit your Way Scotland service. This is staffed by a team of trained advisors who will give you advice tailored to your needs.
4. Stress
Stress hormones cause an increase in blood glucose levels and reduce the effectiveness of insulin.
For some people, stress can also trigger overeating behaviours. The change in body chemicals resulting from eating “comfort foods'' can dampen stress related responses and emotions. Over time, this can lead to prolonged levels of comfort eating and, ultimately, an increase in body weight and the development of T2DM.