Do fasting training helps really lose weight? No. Yes. Maybe. Indifferent. Exercise is what really matters. Eating or not eating before training is “least”.
Fasting training adherents often states that this is the most efficient way to lose body fat. Opponents say it is a terrible and dangerous idea that will make it gain weight.
After all, who is right and what the evidence of the investigation says?
On the one hand, advocates claim that when training fasting, positive changes in body composition can occur through fat losses, maintaining or gaining lean mass. Or even through lean mass gain in the absence of any loss of body fat. All of this can be considered positive.
The idea that fasting exercise leads to such positive changes in body composition comes from investigation that shows that exercising after eating versus exercise before eating affects metabolism differently.
As explained, in an article on, the expert Mandy HagstromProfessor of Exercise Physiology at the University of Nova Wales do Sul in Sydney, Australia, in fact, aerobic exercise in a fasting state makes it burn more fat as fuel (which researchers would call “fat oxidation”) when measured at a single time.
However, a Hagstrom led showed that a fasting training program It does not seem to translate into long-term differences In loss of body fat.
This discrepancy between burnt fat as fuel during exercise and changes in long -term body fat has been misunderstood.
In the science of exercise, it is indeed quite common to verify that short-term effects do not always translate into long-term impacts.
For example, intense short-term exercise may negatively affect the immune system at the moment, but exercise regularly can actually affect it positively in the long run.
What do you eat right away or even before training?
Eat a meal with Carbon and Protein Damding near the Hour where you exercise is probably beneficial for performance in your next training session. However, whether this meal is before or after training seems to have limited impact.
Interestingly, the investigation has shown that increasing the proportion of food you eat in the morning – and, in particular, eating more protein – can help improve body composition and increase weight loss. However, this moment It is not related to the exercise, but to the height of the day.
What about sports performance?
It is relatively clear that eating before exercising improves performance in activities that last more than 60 minutes, but has little effect in performance in Lower duration activities.
This is also evidenced by the lack of elite athletes to support fasting exercise. An inquiry performed at nearly 2,000 resistance athletes showed that non -professional athletes are more likely to exercise fasting compared to professional athletes.
What about strength training?
Then it gets differences in muscle strength, size and changes in body composition in response to resistance training (such as bodybuilding) in fasting versus After eating? Unfortunately, the investigation is limited and of low quality.
This limited evidence so far suggests that it makes no difference.
A recent random controlled test also found no difference in strength, power or lean mass when resistance training was done twice a week for 12 weeks, either after fasting and after food.
What are the potential disadvantages?
Fasting training can leave it with very hunger After exercise, which can lead you to do Worse food choices.
In addition, some people may have headaches and nausea When trying to exercise fasting.
This is not, however, a universal experience; Social networks are full of people who say that exercise fasting makes them feel great.
Eating or not eating is “the least”
In summary, There is no clear winner.
The evidence does not support the superiority of fasting exercise for weight loss or sports performance.
However, the evidence Nor does it show that it causes a problem in many scenarios (except perhaps elite sports performance).
So if you are short and jump the breakfast allow you to get out and make this race or workout, then go ahead. Don’t worry too much with the consequence.
But if the idea of empty stomach training makes him want to avoid the gym, then take breakfast before going. Rest assured, you will not work against your goals.
Fashions of exercise and welfare tricks come and go, but the thing sustained by solid and consistent evidence is exercise.
Doing it is what matters most. Not at the time of day, not the exact choice of exercise, not even the exact amount – and definitely not eaten or not before training.
