With personal training, time is often limited to 60 minutes for client-trainer interaction. Reaching your goals requires much more than your 1 to 4 hours spent with your trainer each week. Adequate discussion about nutrition is a rarity. Hopefully, this monthly section of the newsletter will help fill this void.
This month we’re going to focus on one particular facet of nutrition – meal frequency. Fads tend to develop and grow in the fitness industry more-so and at faster rates than in any other. One such fad states that in order to “stoke your metabolic furnace” and keep it burning hot, you need to eat many small meals each day. Quite often we hear clients say something like, “Man! I’m so frustrated. I simply can’t stick to eating 6 meals per day and I know it’s hindering my fat loss.”
Unfortunately for the individuals who fall victim to this myth, it’s not something that’s supported scientifically. Research certainly suggests higher meal frequencies can help with factors such as satiety and regulation of blood sugar. It does not, however, suggest that higher meal frequencies will lead to a faster metabolism when compared to lower meal frequencies.
Where does this myth come from?
To answer that question, we need to consider what metabolism is comprised of. The core components of what makes up your metabolism and thus your caloric needs are Resting Metabolic Rate (RMR), Thermic Effect of Activity (TEA), and Thermic Effect of Food.
Total Metabolism = RMR + TEA + TEF
For simplicity’s sake, RMR is the calories expended in a state of complete rest. Even when you’re sleeping your body requires energy for things like respiration, organ function, etc. In fact, RMR is the largest component of metabolism. TEA is simply the energy expended via activity. This can include formal exercise as well as gardening, walking the dog, or whatever you enjoy doing when you’re not resting. This is the second largest component of the metabolism equation.
It should be noted that some researchers are breaking out non-exercise activity thermogenesis, otherwise known as NEAT. For an interesting presentation regarding NEAT, check out .
TEF is what we’re really interested in with regards to this concept of meal frequency. TEF is simply the energy required to breakdown, process, and digest the foods we eat. TEF increases after each meal, obviously, as your body works to handle the foods you recently consumed.
Thus, the myth was born. People took this increase in TEF post-eating to mean, “Eat more frequently to boost your metabolism.”
The problem with this logic is this: if we eat fewer, larger meals… the thermic effect per meal is going to be larger as our bodies “work harder” to breakdown and utilize the larger quantity of food per meal. Compare this with more frequent, smaller meals. Sure, you’re getting more spikes in TEF per day, but compared to the former approach, each spike is smaller since there’s less food for the body to handle each meal.
Thus, we’re left with zero net difference in terms of metabolism.
Same calories spread over more, smaller meals = more frequent, yet smaller TEF per day
Same calories spread over less, larger meals = less frequent, yet larger TEF per day
The primary reason we take issue with the incessant need to perpetuate this myth is it tends to make people anxious. The more rigidity you add to a nutrition plan, the less likely people are going to stick to it over the long-term. For those who have busy schedules, aren’t satiated by eating more frequently, or simply don’t feel like eating 6 times per day… DON’T!
The moral of the story is what and how much you eat is certainly very important in terms of your fitness/health goals, but how frequently you eat each day isn’t nearly as important. What takes far more precedence are things like calories in vs. calories out and nutrient (macro and micro) quality of your diet. These are things we will certainly cover in future newsletters.