This is a controversial idea, and there are perceptions that variable weight loss
with isocaloric diets would somehow violate the laws of thermodynamics and that there must be some experimental error.
Not exact matches
In an experiment
with two groups of adults, while one group did targeted ab exercises five days a week for six weeks, the other focused on keeping a balanced «
isocaloric diet.»
Finally, we compared the
diet enriched in soybean oil to an
isocaloric diet that contained the same amount of total fat (40 % kcal, Americans consume 34 - 37 % fat) but
with 90 % of the fat from coconut oil.
Although we found no difference after 1 day or 1 week, intestinal bacterial overgrowth was observed in the gastrointestinal tract of mice fed alcohol for 3 weeks compared
with control mice fed an
isocaloric liquid
diet.
In a landmark study, researchers gave participants
isocaloric diets (meaning they both had the same amount of calories)
with two different ratios of carbohydrates to protein.
Because insulin appears to act synergistically
with leptin in the hypothalamus (36), this increase in insulin AUC may have contributed to the increased satiety observed
with the
isocaloric high - protein
diet.
Results: Satiety was markedly increased
with the
isocaloric high - protein
diet despite an unchanged leptin AUC.
The
isocaloric high - protein
diet led to significant increases in AUC values for the 24 - h insulin profiles obtained during visit CRC2 compared
with those obtained during either visit CRC1 or CRC3.
Our subjects reported a marked increase in satiety
with the
isocaloric high - protein
diet despite an insignificant change in leptin AUC between visit CRC1 and visit CRC2.
The subjects successfully maintained a stable body weight during the
isocaloric diet phase,
with no significant change in mean weight through day 28 (Figure 1).
The
isocaloric high - protein
diet led to no significant change in nadir plasma concentrations, peak plasma concentrations, or AUC values for the 24 - h leptin profiles obtained during CRC2 compared
with those obtained during visit CRC1.
Eighteen - week - old male C57BL / 6 mice were fed continuously for 39 days
with experimental,
isocaloric diets designed to provide either a high (18 %) or a low (4 % — 7 %) amount of calories derived from protein...
In a high quality seven day, randomized, crossover study conducted by Sunehag et al. (2002), twelve healthy, non-obese adolescents (six males, six females) were maintained at home on prepared,
isocaloric diets containing 60 % carbohydrate, 25 % fat, and 15 % protein,
with 10 % or 40 % of the carbohydrate (6 or 24 % of dietary energy) content provided by fructose (low fructose or high fructose
diet, respectively)... The total amounts of fructose ingested in the low and high fructose
diets were estimated to be 36 and 133 g / day in females and 40 and 136 g / day in males.
However, an
isocaloric diet was used,
with only a change in the percentage of carbohydrate contributing to the
diet.
Their findings indicated that 6 weeks of abdominal exercises alone (
with no other training) did not reduce abdominal fat (Note: both the ab exercising group and the control group had identical
isocaloric diets)
Long - term effects of a very - low - carbohydrate weight loss
diet compared
with an
isocaloric low - fat
diet after 12 mo
Long - term effects of a very - low - carbohydrate weight loss
diet compared
with an
isocaloric low - fat
diet after 12 months.
Apparently,
isocaloric carbohydrate deprivation induces a catabolic state
with respect to protein metabolism compared
with diets with a normal composition and compared
with starvation.
Metabolic effects of weight loss on a very - low - carbohydrate
diet compared
with an
isocaloric high - carbohydrate
diet in abdominally obese subjects.