Impact on Eating Later at Night Study

GaleHawkins

https://pennmedicine.org/news/news-releases/2017/june/timing-meals-later-at-night-can-cause-weight-gain-and-impair-fat-metabolism

While I know it is true in my case the science does seem to support this is a more universal impact than some that post through to be the case.

ninerbuff

Must have been just US citizens. Because in Europe, it's NOT uncommon to eat late late dinners (like 10 o'clock pm). And places like France, Spain, Greece, etc. that do this, don't have weight issues like those of Americans.

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GottaBurnEmAll

I'd love to actually read the study and find out what the normal eating pattern of the study participants was before they took part in it.

It seems logical to me that any deviation from what is a normal hunger pattern would cause issues for someone.

There are too many people (as ninerbuff stated) who eat late at night without weight issues to take this information as "science supporting a more universal impact" on anything.

In other words, people are different.

deannalfisher

this counters other recent research I'm seeing from journal of metabolic research and similar - which indicated that eating at night, helps with the recovery of muscles and building of lean muscle mass...

Need2Exerc1se

Nine participants? I'm supposed to change my meal times based on a single 18 week study of 9 participants? How about my 30+ year study of 1 which shows no problems with lipids or blood glucose despite eating late nearly every day.

CSARdiver

Seems counter intuitive. I cannot eat heavy meals early on and workout the way I do, so my evening meal is always the largest meal. It's also about the only downtime I have.

It would be interesting to see the source data and if this exceeded statistical significance.

CSARdiver

0064
DELAYED EATING ADVERSELY IMPACTS WEIGHT AND
METABOLISM COMPARED WITH DAYTIME EATING IN
NORMAL WEIGHT ADULTS
Goel N1
, Hopkins C2
, Ruggieri M2
, Ahima RS3
, Allison KC2
1
Division of Sleep and Chronobiology, Department of Psychiatry,
University of Pennsylvania Perelman School of Medicine,
Philadelphia, PA, 2
Center for Weight and Eating Disorders,
Department of Psychiatry, University of Pennsylvania Perelman
School of Medicine, Philadelphia, PA, 3
Division of Endocrinology,
Diabetes and Metabolism, Johns Hopkins University School of
Medicine, Baltimore, MD
Introduction: In humans and rodents, the timing of food consumption
is a major contributor to body weight regulation. Sleep-wake cycle
disruptions and circadian misalignment due to shifts from a diurnal to
nocturnal lifestyle produce abnormal circadian rhythms and metabolic
dysfunction. However, the metabolic consequences of a consistent,
prolonged delayed eating pattern compared with a daytime one, are
unknown.
Methods: 8 healthy adults (age: 26.25±3.2y; BMI: 22.39±1.9kg/m2
;
4 females) participated in a randomized cross-over study in free-living
conditions with 2 phases: 1.) daytime eating (3 meals and 2 snacks
consumed between 0800h-1900h); 2.) delayed eating (3 meals and 2
snacks consumed between 1200h-2300h). Energy and macronutrient
content were comparable between conditions, and the sleep-wake cycle
was held constant at 2300h-0700h (verified by actigraphy), with exercise
levels controlled. Participants spent 8 weeks on the first condition,
A25 SLEEP, Volume 40, Abstract Supplement, 2017

A. Basic Sleep Science III. Physiology
followed by a 2-week washout period, followed by 8 weeks on the second
condition. Weight, adiposity, energy metabolism, and hormonal
markers were assessed at 4 points: 1.) baseline; 2.) after the first eating
condition; 3.) after the washout period, before the second eating condition
began; and 4.) after the second eating condition. General Linear
Models were used for statistical analysis, and cosinor analysis determined
circadian rhythm amplitude and phase.
Results: Preliminary analyses indicate delayed eating, compared to
daytime eating, led to weight gain and increases in respiratory quotient.
Insulin and cholesterol levels also were increased and adiponectin
was decreased. In addition, the ghrelin phase was delayed with
greater amplitude, while the melatonin phase and amplitude remained
unchanged.

Conclusion: This study provides the first experimental evidence that
prolonged delayed eating promotes weight gain and a negative profile
for fuel oxidation, energy metabolism and hormonal markers, in
normal weight adults. Our findings suggest peripheral clocks may
be affected by delayed timed eating, while the central clock remains
entrained to the sleep-wake cycle.

Support (If Any): This research was supported by NIH grant R21
DK100787.

GottaBurnEmAll

Energy and macronutrients were kept ... comparable?

I want details. I would think they should have been held constant.

What was the mechanism for weight gain and how much weight did these people gain?

I'm still skeptical about this whole ish.

Seffell

ninerbuff wrote: »

Must have been just US citizens. Because in Europe, it's NOT uncommon to eat late late dinners (like 10 o'clock pm). And places like France, Spain, Greece, etc. that do this, don't have weight issues like those of Americans.

A.C.E. Certified Personal and Group Fitness Trainer
IDEA Fitness member
Kickboxing Certified Instructor
Been in fitness for 30 years and have studied kinesiology and nutrition

I was just going to say the exact same thing. In Eastern Europe dinner is eaten around 9 or even 10. And people are very slim overall.

amysteri

Interesting study!
It would be great to see more studies like this and see if the results are similar.

but if my tummy grumbles at night, I'll have to eat

chrissymoore06

For me I feel better with a 12 to 14 hour fast while mostly asleep. I think it just depends on the person and how there body responds. If i eat a big meal it makes me feel sluggish. I snack through out the day and fast at night.