
During exercise, the body requires glycogen to provide the working muscles with energy. One of the three fuel stores mentioned above provides this glycogen. It is exercise intensity, not the type of exercise, which determines if fat is being used as the fuel source. Exercise intensity is measured by how much oxygen you are using. In low intensity exercises (less than 40% maximal oxygen usage) the principle source of fuel for the body is fat. Beyond 40%, this becomes carbohydrate.
How do I burn lots of fat?
At these lower intensities of exercise, less actual fat is burned (because you are doing less exercise!). So what you need to do is increase the intensity slightly to 50% of your maximum (so that slightly more carbohydrates are being burned than fat), but because of the higher rate of exercise, more grams of fat will be burned overall!
So 50% of your maximum effort is your best rate to drop those kilos.
How do I work out what is my maximum effort?
A good way to approximate this is to use your heart rate. Your maximum heart rate (beats per minute- BPM) can be approximated by the following: 220-age (years). For example, Jenny is a 30 year old female, and her maximum heart rate would be approximately 190BPM. So for Jenny to burn fat and drop lots of kilos, she should do exercises that keep her heart rate around 95BPM.
What are good exercises for this?
Great exercises for this are high-paced walking, moderate swimming, spinning or cycling (in low gears to ensure lots of pedalling!) or even activities like tennis or netball should help. The longer you can keep your heart rate at 50% of your maximum, the more fat you will burn and the kilos will simply fall off.
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I agree Dianne! I've been doing that for a while and it really works. A friend put me onto the idea- but it's great to see it in print to confirm!
Very insightful article
Very insightful article
I have been doing high intensity workouts for ever and i am not seeing any results. I will give your theory a go for 2 weeks and see if the scales budge. I will write back then.
it is so good to have it set out simply like that. I wonder how many peopel think they are doing the right thing by running and getting completely out of breath tolose weight when in actual fact it is wuite the opposite. Thanks for a great article