Ketogenic diets are low
in carbohydrates and contain high amount of fats and proteins. Ketogenic diet
is sometimes used to treat epilepsy in children. It prevents seizure from
occurring and the reason behind it is still unknown. Ketogenic diet can also be
used to lose weight but it is not regarded as a safe means of weight loss.
other sports people use many weight reduction methods but most of these methods
negatively influence physiological efficiency during sports performance. Many gymnasts and body builders use the so
called very low carbohydrate ketogenic diet (VLCKD) that has shown to be a safe
weight loss diet tool which does not affect muscle strength or muscle size.
However, not much research is available on this subject.
Paoli at the University of Padova, Italy, and his colleagues recruited 8 elite
artistic gymnasts and analyzed their body composition and various performance
aspects before and after 30 days of a modified VLCKD that included green vegetables,
olive oil, fish and meat and other almost-no-carbohydrates but high quality
significant reduction in body weight and fat mass with a non-significant
increase in muscle mass.
The study has
been published in the Journal of the International Society of Sports Nutrition.
and nutrition scientists say that carbohydrate must constitute a major
component in our daily diet in those people who are involved with hard core
physical exercise. This view is based on a long list of published studies that
were performed over the last century that links muscle glycogen stores to high
intensity exercise. It has also been reported that people who consume diet
deficient in carbohydrates experience light headedness, weakness, and ease of
Glucose is the
simplest form of carbohydrates, but when several glucose molecules are linked
together in chains, they form complex carbohydrates. They are responsible for
providing energy throughout the day.
behind ketogenic food in the diet is that low carbohydrate intake will force
the body to burn its fat reserves as an alternative source of energy. The diet
mimics the aspects of starvation. It derives the name from the organic bodies
that are known as the ketone bodies that are synthesized by the conversion of
the fatty acids in the liver when the glucose availability is limited. This
usually happens when the daily carbohydrate intake is less than 30g.
When the source
of glucose is not available as the immediate energy source, the ketone bodies
can replace glucose as a source of energy. This is especially important for the
brain that predominantly uses glucose for energy.
shown that ketogenic food items being extremely low in carbohydrates push the
body into ketosis, (which means the body primarily burns fat but not
carbohydrates for energy) thus elevating the levels of ketones in the blood.
Humans can use ketones as a source of energy for bodily functions and even as a
replacement for glucose to provide fuel for the brain. However, ketones are
toxic to the body if they are present in excess and the body actively attempts
to rid itself of them. Ketones are removed from the body in the urine and also
through the lungs causing a sweet-ish nail varnish like breath.
food in excess is harmful. The side effects include dehydration, constipation,
and occasionally kidney stones or gall stones. A very high level of ketones can
be harmful to the body; it can be toxic making the blood more acidic which in
turn can damage the kidneys and liver.
The authors of
this study concluded - 'The undeniable and sudden effect of VLCKD on fat loss
may be useful for those athletes who compete in sports based on weight class.
We have demonstrated that using VLCKD for a relatively short time period (i.e.
30 days) can decrease body weight and body fat without negative effects on
strength performance in high level athletes'.