Lipids, guys and girls is another word for fats if you didn’t know already. There are a few different types of fats such as phospholipids, sterols and triglycerides. Structurally they differ between each other and this in turn has different effects in the body.
So when we exercise what macro nutrient do you think gets metabolised? Carbohydrates, fats or proteins? Go on think …
They actually all play a part in metabolism! However, we are actually talking today about fats/lipids being metabolised! There are many people out there who still think that fat is bad for you, it causes this disease and that one and oh yes….makes you fat! Well fortunately that isn’t the truth about fat at all as fat is the second most abundant property in our body after water. Fat is a vital component of cell membranes, it helps with biochemical reactions and also acts as an energy source. It also acts as subcutaneous insulation too which helps us keep body temperature regulated.
During exercise, again lots of us think that only carbohydrates are the source of energy used for energy metabolism. However, there is a hell of a lot more fat stores than carbs. On average in an adult body there is something like 100,000 Kcal of fat stores which is around 50 times fore than carb stores! Guess we are all fat then ! But we know now that it doesn’t work like that – FAT DOES NOT MAKE YOU FAT! So now that’s cleared up, back to what I was going on about…if we have that many Kcal of fat then there is no way on this planet that we will not be using that for metabolism! There are different ways of achieving lipolysis. During exercise IMTG (intramuscular triglycerides) which are located within the muscle itself gets utilised. Type 1 fibers have more stores than type 2 which makes sense as these fibers are more fatigue resistant than type 2 bad boys!
Depending on intensity of exercise the body uses different amounts of fats and carbohydrates. During exercise our body can use up to 70% of IMTG to fuel our workouts. These IMTG stores have been proven to be important even during rest after exercise bouts to restore ATP sources and the structural integrity of our system. During rest and low intense exercise in trained and untrained individuals, fat is the most used source of fuel and as intensity increases the body switches to carbohydrate usage. This is why Forest Gump could run for 3 years at a slow pace because he was using his fat stores. If he was sprinting then that would mean carbs would be his main source and we already know now that our body doesn’t store that much of carbs, he would have burned out probably after 6 months! All I am getting at people is that if you want to do exercise at a low intensity then you will be using fat, mainly IMTG to fuel our workouts.
However fat stores are still used during higher intensity workouts as well! Fat utilisation is a great way of extending workouts and producing ATP for energy. People only think of carbs and high sugar digestion prior to a workout but there have been studies and from personal experience that having a fatty meal a few hours before a workout can actually generate the same amount of energy as opposed to eating high sugary foods before a workout. The body uses short and medium chain fatty acids a lot quicker than long chain fatty acids, so having foods such as coconut and milk can benefit you in your workouts. The good thing with short chain fats are that they don’t need that much time being broken down in the intestines, they get absorbed by albumin and gets down straight to the job no messing about. If you are looking for more examples then look for foods high in butyric and caprilic acid and they’ll do the job! So guys and girls if you want to stuff your gob with good fats prior to a workout then that is fine. You will still perform well at your workouts. Howevverrrrr, remember people these are fats not sugary carbohydrates so that means it will still take the body a bit longer to digest so give it at least an hour or so prior to a workout. An example would be to have a couple of tablespoons of peanut butter and a glass of milk, now you could get away with having that 45 minutes before a workout just for a bit of energy as the body will store that in your muscles and use that essentially as energy for a BIG SESSION!
The rate of lipolysis increases significantly during mild to moderate intensity exercise meaning that the amount of fat used for energy increases exponentially. Usually when carrying out weight training sessions, VO2 max levels won’t really go up past 70% obviously depending on what you are doing but in general VO2 max is between 55% – 75% which is prime time for fat utilisation. This is why lots of gym goers now have switched to fatty foods to improve their muscle tone, body composition and even strength! There have been times when even carrying out high intensity sessions such as boxing or cross fit, eating a fat meal 2 hours before can seriously benefit your energy levels in sustaining ATP sources for a prolonged period of time! Now guys before you bash me with things like carbs are the main source for high intense workouts, let me just reiterate – carbs are definitely beneficial for high intensity workouts and they will always be like that, that is just the way our body works. But I am offering an alternative especially for those who are looking for reducing body fat and maintaining muscle tone – eating fats especially short and medium chain fatty acids will definitely benefit your workouts!
So there above is a little about fat metabolism and why it can be beneficial for your workouts without going too much in to the sciency part which would bore you all! Have a read of this blog and it might some of you find other alternatives for fuel. Because let’s be honest how many of us are bored of eating the same foods? Probably most of us and this is why it is important to try new things and what better than trying other foods which will still benefit your workouts and metabolism. So get going and get some FAT!