Meal or nutrient timing is the strategic scheduling of eating whole foods, fortified foods, and dietary supplements. More specifically, a person may eat a specific nutrient in a particular amount at an exact time for a specific reason.
If that sounds like a mouthful…well…it is. To simplify things, let's create an example.
If I’m a person looking to lose weight, I would :
That, in essence, is what meal timing is all about. In addition to using meal timing for exercise benefits, it can also be used for appetite control, blood sugar regulation, weight loss, muscle strength, size, and recovery.
So far, meal timing sounds swell! Next, let’s discuss why it matters.
Meal timing matters for a lot of different reasons. One of the significant reasons is it helps you maintain a better routine. This is key when trying to stick to a diet, as when dialled in, meal timing can take a lot of the guesswork out of an eating schedule.
Proper meal timing also matters because of it:
If you’re still not convinced that hopping on the meal timing train is a good idea, let’s briefly look at the health and performance benefits before diving into the research. This is the juicy stuff you’re going to want to know!
Correctly timing your meals and snacks can benefit overall health and exercise/athletic performance. These include:
Let’s look at these benefits and see what the research recommends.
Fortunately for us, there isn’t a shortage of evidence regarding research on meal timing. Hundreds of clinical trials have been performed on thousands of subjects that have examined how meal timing can affect health, performance, and other variables in sedentary, obese, and athletic populations.
After reading this section, you’ll practically have your Ph.D. in meal timing.
If one of your main goals is weight loss, the evidence suggests there is an ideal time to eat.
A landmark study conducted in 1997 required subjects to complete two six-week diet periods that delivered similar calories (~ 1950 kcals) and similar macronutrient composition.
In one group, the participants consumed 70% of their total daily calories during breakfast, while in the other study group, participants consumed 70% of their total daily calories during dinner.
The researchers discovered more significant weight loss in the group that ate most of their daily calories at breakfast.
More recently, a study conducted by Jakubowicz et al. had overweight and obese women consume 1400 calories each day for 12 weeks.
One group ate 50% of their daily calories (700 kcals) during breakfast, 35% during lunch (500 kcals), and 15% during dinner (200 kcals), while the other group ate the exact opposite distribution, 15% for breakfast (200 kcals), 35% for lunch (500 kcals) and 50% for dinner (700 kcals).
Approximately 2.5 times more weight was lost, and significantly greater changes in waist circumference and body mass index values were observed when most calories were consumed at breakfast.
Also, triglyceride levels decreased by 34%, more significant improvements in glucose and insulin were observed, and feelings of satiety were improved in the group that consumed most of their calories at breakfast.
The key point from these two studies indicates that if weight loss is your goal, eat more in the morning and less in the evening.
Just as eating more in the morning and less in the evening helps with weight loss, the same can be said about appetite control and suppression.
A 2019 study published in the Obesity Journal demonstrates this.
For this study, researchers compared two groups of people (early eating and the control group) who ate the same three meals per day for four days but at different times. The early eating group ate the majority of their calories during the morning. The control group consumed the majority of their calories in the evening.
On the fourth day of the study, both groups had their metabolism measured…specifically calories burned and the amount of fat, carbs, and proteins burned. Both groups also rated various measures of appetite, like hunger, desire to eat, and fullness.
The researcher also measured levels of hunger hormones in each group.
The results are fascinating. The early eating group burned more calories and fat while having lower levels of the hunger hormone ghrelin. The group also reported less hunger and desire to eat than the control group.
If appetite control is ever an issue for you, eating most of your calories at breakfast and lunch is suggested.
Blood sugar spikes are no joke. Too high, and they can cause you to feel anxious and jittery. Too low can cause hypoglycemia, that horrible lightheaded and tired feeling.
It should also be noted that eating a large amount of carbs, such as a bowl of pasta, at 10 pm compared to 10 am will cause a higher blood glucose spike due to fluctuations in your circadian rhythm. Individuals should eat more carbs in the morning and less in the evening/night.
Meal timing can play a big part in helping to avoid the lows and highs of blood sugar levels and help keep it steady so you remain energized and focused.
The strategy here is to never go too long between meals and snacks and eat every 3-4 hours. This schedule will help stabilize blood glucose levels and avoid blood sugar spikes.
It also helps people avoid overeating when hungry and consume fat-laden, calorie-dense foods to satisfy their appetite.
Carbs are king when fueling endurance exercise, especially as intensity increases. Therefore, people can strategically time their meals/carbs when they want to run, bike, or do other endurance exercises for optimal performance. Here are the guidelines that also include a note on post-workout meal timing for recovery.
Pre Workout Meal Timing
Post Workout Meal Timing
If you want to get stronger or put on size, meal timing for strength training differs from endurance training. The difference is that your pre and post-meal macronutrient profile will include fewer carbohydrates and more protein and amino acids.
Before and after strength training sessions, meal timing maximizes muscle protein synthesis, minimizes exercise-induced muscle damage, and facilitates short and long-term training adaptations (strength, size, power, endurance).
Pre Workout Meal Timing
Post Workout Meal Timing
The suprachiasmatic nucleus (SCN) located in our brains is responsible for controlling our circadian rhythms. It governs metabolic processes, energy generation, and energy usage.
Irregular eating patterns can cause a separation of feedback between the SCN and food availability. This can change the metabolic processes of tissues due to several changes in gene rhythms, leading to erratic blood sugar levels and making us feel like we need to eat when we don’t. This is why it is crucial to develop a meal-timing routine.
The circadian rhythm may also explain why eating more in the morning leads to more significant weight loss and appetite control.
The research suggests:
Yes! As mentioned, eating every 3-4 hours will help keep blood glucose levels stable. This will help with appetite control, blood sugar spikes, and hypoglycemia and energize you throughout the day.
It depends. If eating right before a workout upsets your stomach, it might be best to avoid a small snack beforehand. On the other hand, if you need more energy before cardio or strength training, eat 50 grams of carbs fifteen minutes before starting. A banana or sports drink would be a good choice.
Avoid eating any large meal three to four hours before bed. This will give your body plenty of time to digest and absorb nutrients without causing you to toss and turn all night.
Eating a large meal before bed can also cause acid reflux due to the horizontal position of the body during sleep. Stomach pain is common in individuals who have large meals close to bedtime.
Another reason to avoid large meals before bedtime is high blood sugar can minimize the release of growth hormones several times throughout the night. This can affect muscle and whole-body recovery.
If you’re hungry before bed, opt for a small snack with a small amount of fat, protein, and carbs. Cottage cheese with fruit would be a good choice.
When and what you eat can affect your health and exercise performance. Therefore, following the advice above and developing a meal plan that works for you is recommended. To recap:
Your meal timing plan should be re-evaluated as necessary, depending on your lifestyle and athletic goals.
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