Do you know if intermittent fasting when boxing traning is good?
How long should the fast last?
Should some carbs be eaten before the workout?
I do intermittent fasting. I would recommend that you spend some time getting used to it before you start hardcore training while fasted. In my experience fasting improves my cognitive and mind function, in both school and boxing. Not sure if it’ll work the same for everyone but it does me
Try it out and see how it goes. The belief that everyone should eat 3 square meals a day with snacks every 2hrs in between is no longer valid. All you do there is keep your blood glucose and insulin levels high. Read about the science behind IF and take it slow at first if you start. its a great way to improve your health and maintain or lose weight
A lot of the fasting question revolves around a few things - hormonal profile, tendency to respond to fasted training, and metabolic need.
1 - Hormonal profile. For anyone that has had this tested, the result is generally unanimous (unless you're a 20 year old kid with his hair on fire). In a typical 16:8 fasting plan free testosterone tends to skyrocket in the short term and normalize the longer into the fasting diet you get. That means - the amount of bindable testosterone in your blood will go up - significantly - after a few weeks, then start to taper down once your body gets used to the new eating habit. Why is that good? Well, testosterone is good for guys (when naturally produced), full stop.
2 - Tendency to respond to fasted training. This is a big one, and the one most people miss. What I said in point 1 is a 'hard truth' but it can be circumvented. If you respond very poorly to fasted training (or, 'if you train like crap because you're hungry') then all the test in the world isn't going to do anything for you. I can't train fasted. My metabolism tanks and I feel like crap. The reason this is relevant is because some people have only one section of the day where training is available. If you respond poorly to fasted training but simply must train in your fasting window, consider a different diet methodology (or manipulate your window).
3 - Metabolic Need. As much as there are benefits to fasting, some people just can't handle it. There are guys (and gals) that have the metabolic rate of a coked-up hummingbird. I mean, people with resting heart rates above 90. While the end-result of fasting on a periodic basis may be beneficial, there's absolutely no way these people can have a consistent IF-style diet and be comfortable. These are people that need a drip-feed of nutrients throughout the day to keep energy levels up and to keep adipose tissue (fat) from collecting because the body thinks it's starving. If you are hungry 20 minutes after you eat and you're heart rate is constantly high - you may be one of those people.
TL;DR - if you respond well to the IF diet in general, it will probably help you in your boxing because it has a bunch of health and chemical benefits. If you don't, you're going to suffer.
Human growth hormone increases inside your body when you do fasting. When you eat, HGH goes down and insulin goes up. Insulin decreases when you don't eat and HGH goes up. The two are inversely proportional. its totally possible to build muscle while doing IF.
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