As a reminder, the goal of the experiment was to test whether additional factors often considered to aid weight loss could actually accelerate Adam’s weight loss.
Part one can be found below
So let’s see which of these factors helped Adam lose weight.
From a practical perspective, considering the structure of the alias structure, the active effect is effect C: Exercise time. The other effects have a small, even negligible, impact on weight loss. Because C interacts with A: Calorie Source, we ultimately consider effects A, E, and C, as well as the AC interaction, to be the active effects.
Factor Effect [kg]
A: Calorie source 0,2813
C: Activity time [min/week] 0,7212
E: Protein source – 0,2312
A *C 0,2063
R-sq R-sq(adj)
96,68% 95,47%
With these 4 effects we can explain 97% of the variation created in this DOE.
- Effect A: Switching from a standard balanced diet to a high-protein diet increases average weekly weight loss by 0.3 kg.
- Effect C: Increasing physical activity from 150 to 300 minutes per week results in an additional weight loss of 0.7 kg per week.
- Because factors A and C are in an active AC interaction, final conclusions will only be possible after analyzing this interaction.
- Effect E: Switching from unprocessed to highly processed protein sources reduces the rate of weight loss by 0.2 kg per week. This effect does not interact actively with any other factor tested in this experiment. This means that it will proceed in a very similar manner regardless of the levels of the other factors tested in this DOE.
- Interaction A*C: when there is less exercise (150 min/ week), a high-protein diet makes practically no difference (the weight loss will be on average 0.45 kg), but already with 300 minutes of activity, its introduction increases the weight loss from an average of 0.9 to 1.4 kg per week.
SUMMARY
By far the greatest impact on weekly weight loss comes from increasing physical activity. It’s important to remember that throughout the diet, Adam maintained a calorie deficit and drank approximately 3 liters of water daily.
- 150 minutes of exercise per week = average weight loss of approximately 0.4 kg/week.
- A high-protein diet provides no additional benefits.
- Highly processed protein slows weight loss regardless of other factors.
- 300 minutes of exercise per week = average weight loss of 1.1 kg/week.
- With a high-protein diet and unprocessed protein – up to 1.4 kg/week.
The type of physical activity, number of meals per day, eating or skipping breakfast, drinking water with vinegar on an empty stomach, or taking L-Carnitine supplements do not affect weekly weight loss.
Questions we need to answer:
- Who can benefit from these conclusions? Will they be applicable to others?
- What should Adam do to weigh 70 kg? How long will it take?
- Does the type of activity—running vs. cycling—remain irrelevant?
- Is the number of meals really irrelevant? Does eating/not eating breakfast really not important?
- Is drinking water with vinegar and supplementing with L-Carnitine really irrelevant?
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