Higher Fat-Free Mass (FFM) Or Lean Body Mass (LBM) Predicts Slightly Higher Attentiveness for Population
Contents

Variables

A
Fat-Free Mass (FFM) or Lean Body Mass (LBM) 1325
A
Attentiveness 1093

Categories

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Physique 41
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Emotions 2028

Actions

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Join Study
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Your Data

Tags

Low Confidence
Very Weak Effect Size
Positive Relationship
Population Study
cause image gauge image effect image
Participants reported a 2.6% average increase in Attentiveness following above average Fat-Free Mass (FFM) Or Lean Body Mass (LBM).
Abstract

Abstract

Attentiveness was generally 5% higher than average after an average of 65.5 kilograms of Fat-Free Mass over the previous 7 days.

Aggregated data from 5 study participants suggests with a LOW degree of confidence (p=0.138, 95% CI -0.439 to 0.738) that Fat-Free Mass has a weakly positive predictive relationship (R=0.149) with Attentiveness.

The highest quartile of Attentiveness measurements were observed following an average 65.7 kilograms Fat-Free Mass.

The lowest quartile of Attentiveness measurements were observed following an average 65.5 kilograms of Fat-Free Mass.

After an onset delay of 0 seconds, Attentiveness is typically 8% lower than average over the 7 days following around 65.5 kilograms Fat-Free Mass.

Objective

Objective

The objective of this study is to determine the nature of the relationship (if any) between Fat-Free Mass and Attentiveness. Additionally, we attempt to determine the Fat-Free Mass (FFM) Or Lean Body Mass (LBM) values most likely to produce optimal Attentiveness values.
Participant Instructions

Participant Instructions

Fat-Free Mass (FFM) Or Lean Body Mass (LBM) Automatic Import of Fat-Free Mass (FFM) or Lean Body Mass (LBM) via Fitbit

A Get Fitbit here and use it to record your Fat-Free Mass (FFM) or Lean Body Mass (LBM). Then, A import your data here .

Manual Recording Option

A Create a reminder for Fat-Free Mass (FFM) or Lean Body Mass (LBM) here and record it daily by enabling notifications or using A the reminder inbox here .

Fat-Free Mass (FFM) Or Lean Body Mass (LBM) Automatic Import of Fat-Free Mass (FFM) or Lean Body Mass (LBM) via Withings

A Get Withings here and use it to record your Fat-Free Mass (FFM) or Lean Body Mass (LBM). Then, A import your data here .


Manual Recording Option

A Create a reminder for Attentiveness here and record it daily by enabling notifications or using A the reminder inbox here .

Design

Design

This study is based on data donated by 5 participants. Thus, the study design is equivalent to the aggregation of 5 separate n=1 observational natural experiments.

Data Analysis

Data Analysis

Fat-Free Mass (FFM) or Lean Body Mass (LBM) Pre-Processing

Fat-Free Mass (FFM) or Lean Body Mass (LBM) measurement values below 0 kilograms were assumed erroneous and removed. No maximum allowed measurement value was defined for Fat-Free Mass (FFM) or Lean Body Mass (LBM). No missing data filling value was defined for Fat-Free Mass (FFM) or Lean Body Mass (LBM) so any gaps in data were just not analyzed instead of assuming zero values for those times.

Attentiveness Pre-Processing

Attentiveness measurement values below 1 out of 5 were assumed erroneous and removed. Attentiveness measurement values above 5 out of 5 were assumed erroneous and removed. No missing data filling value was defined for Attentiveness so any gaps in data were just not analyzed instead of assuming zero values for those times.

Predictive Analytics

It was assumed that 0 seconds would pass before a change in Fat-Free Mass (FFM) Or Lean Body Mass (LBM) would produce an observable change in Attentiveness.

It was assumed that Fat-Free Mass (FFM) Or Lean Body Mass (LBM) could produce an observable change in Attentiveness for as much as 7 days after the stimulus event.

Statistical Significance

Statistical Significance

Using a two-tailed t-test with alpha = 0.05, it was determined that the change in Attentiveness is statistically significant at 95% confidence interval.

After treatment, a 2.6% increase (-0.0176 out of 5) from the mean baseline 3.1 out of 5 was observed. The relative standard deviation at baseline was 28.08%. The observed change was 0.716981 times the standard deviation.

A common rule of thumb considers a change greater than twice the baseline standard deviation on two separate pre-post experiments may be considered significant. This occurrence would have only a 5% likelihood of resulting from random fluctuation (a p-value < 0.05).

Data Sources

Data Sources

Fat-Free Mass (FFM) Or Lean Body Mass (LBM) data was primarily collected using Fitbit. Fitbit makes activity tracking easy and automatic.

Attentiveness data was primarily collected using QuantiModo. QuantiModo allows you to easily track mood, symptoms, or any outcome you want to optimize in a fraction of a second. You can also import your data from over 30 other apps and devices. QuantiModo then analyzes your data to identify which hidden factors are most likely to be influencing your mood or symptoms.

Limitations

Limitations

As with any human experiment, it was impossible to control for all potentially confounding variables. Correlation does not necessarily imply causation. We can never know for sure if one factor is definitely the cause of an outcome. However, lack of correlation definitely implies the lack of a causal relationship. Hence, we can with great confidence rule out non-existent relationships. For instance, if we discover no relationship between mood and an antidepressant this information is just as or even more valuable than the discovery that there is a relationship.

We can also take advantage of several characteristics of time series data from many subjects to infer the likelihood of a causal relationship if we do find a correlational relationship. The criteria for causation are a group of minimal conditions necessary to provide adequate evidence of a causal relationship between an incidence and a possible consequence.

Criteria For Causal Inference

Strength (A.K.A. Effect Size)

A small association does not mean that there is not a causal effect, though the larger the association, the more likely that it is causal. There is a weakly positive (R = 0.1493) relationship between Fat-Free Mass (FFM) Or Lean Body Mass (LBM) and Attentiveness.

Consistency (A.K.A. Reproducibility)

Consistent findings observed by different persons in different places with different samples strengthens the likelihood of an effect. Furthermore, in accordance with the law of large numbers (LLN), the predictive power and accuracy of these results will continually grow over time. 94 paired data points were used in this analysis. Assuming that the relationship is merely coincidental, as the participant independently modifies their Fat-Free Mass (FFM) Or Lean Body Mass (LBM) values, the observed strength of the relationship will decline until it is below the threshold of significance. To it another way, in the case that we do find a spurious correlation, suggesting that banana intake improves mood for instance, one will likely increase their banana intake. Due to the fact that this correlation is spurious, it is unlikely that you will see a continued and persistent corresponding increase in mood. So over time, the spurious correlation will naturally dissipate.

Specificity

Causation is likely if a very specific population at a specific site and disease with no other likely explanation. The more specific an association between a factor and an effect is, the bigger the probability of a causal relationship.

Temporality

The effect has to occur after the cause (and if there is an expected delay between the cause and expected effect, then the effect must occur after that delay). The confidence in a causal relationship is bolstered by the fact that time-precedence was taken into account in all calculations.

Biological Gradient

Greater exposure should generally lead to greater incidence of the effect. However, in some cases, the mere presence of the factor can trigger the effect. In other cases, an inverse proportion is observed: greater exposure leads to lower incidence.

Plausibility

A plausible bio-chemical mechanism between cause and effect is critical. This is where human brains excel.

Based on our responses so far,

0 humans feel that there is a plausible mechanism of action for a relationship between Fat-Free Mass (FFM) Or Lean Body Mass (LBM) and Attentiveness.

0 humans feel that any relationship observed between Fat-Free Mass (FFM) Or Lean Body Mass (LBM) and Attentiveness is coincidental.

Coherence

Coherence between epidemiological and laboratory findings increases the likelihood of an effect. It will be very enlightening to aggregate this data with the data from other participants with similar genetic, diseasomic, environmentomic, and demographic profiles.

Experiment

All of human life can be considered a natural experiment. Occasionally, it is possible to appeal to experimental evidence.

Analogy

The effect of similar factors may be considered.

Plausibility

Plausibility

A plausible bio-chemical mechanism between cause and effect is critical. This is where human brains excel. Based on our responses so far, 0 humans feel that there is a plausible mechanism of action and 0 feel that any relationship observed between Fat-Free Mass (FFM) Or Lean Body Mass (LBM) and Attentiveness is coincidental.

Relationship Statistics

Property Value
Cause Variable Name Fat-Free Mass (FFM) Or Lean Body Mass (LBM)
Effect Variable Name Attentiveness
Sinn Predictive Coefficient 0.058744970187787
Confidence Level LOW
Confidence Interval 0.58865872125031
Forward Pearson Predictive Coefficient 0.1493
Critical T Value 1.7422
Average Fat- Free Mass (FFM) Or Lean Body Mass (LBM) Over Previous 7 days Before ABOVE Average Attentiveness 65.7 kilograms
Average Fat- Free Mass (FFM) Or Lean Body Mass (LBM) Over Previous 7 days Before BELOW Average Attentiveness 65.5 kilograms
Duration of Action 7 days
Effect Size weakly positive
Number of Paired Measurements 94
Optimal Pearson Product 0.16346012378974
P Value 0.13807300487584
Statistical Significance 0.1071
Strength of Relationship 0.58865872125031
Study Type population
Analysis Performed At 2021-08-30
Number of Participants 5

Fat-Free Mass (FFM) or Lean Body Mass (LBM) Info

Property Value
Variable Name Fat-Free Mass (FFM) Or Lean Body Mass (LBM)
Aggregation Method MEAN
Analysis Performed At 2020-10-11
Duration of Action 7 days
Kurtosis 10.976892166151
Mean 64.252128806083 kilograms
Median 64.157985294118 kilograms
Minimum Allowed Value 0 kilograms
Number of Aggregate Predictors 1182
Number of Aggregate Outcomes 143
Number of Measurements 16653
Number of Measurements (including those generated by tagged, joined, or child variables) 11124
Public true
Onset Delay 0 seconds
Standard Deviation 3.7685853910783
Unit Kilograms
User Variables 35
UPC 767674467897
Variable Category Physique
Variable ID 5955691
Variance 43.756405212264

Attentiveness Info

Property Value
Variable Name Attentiveness
Aggregation Method MEAN
Analysis Performed At 2020-09-17
Duration of Action 24 hours
Kurtosis 2.8989604447383
Maximum Allowed Value 5 out of 5
Mean 2.6104259171135 out of 5
Median 2.603650254387 out of 5
Minimum Allowed Value 1 out of 5
Number of Aggregate Predictors 979
Number of Aggregate Outcomes 114
Number of Measurements 20541
Number of Measurements (including those generated by tagged, joined, or child variables) 20486
Public true
Onset Delay 0 seconds
Standard Deviation 0.46181906465469
Unit 1 to 5 Rating
User Variables 1464
UPC 0
Variable Category Emotions
Variable ID 1267
Variance 0.46818963151551

Principal Investigator

Cite This Study

APA Format
Sinn, M. P. (2026). Higher Fat-Free Mass (FFM) Or Lean Body Mass (LBM) Predicts Slightly Higher Attentiveness for Population. The Journal of Citizen Science. https://studies.crowdsourcingcures.org/study/cause-5955691-effect-1267-population-study
BibTeX
@misc{sinn_cause_5955691_effect_1267_population_study_2026,
  author = {Sinn, Mike P.},
  title = {Higher Fat-Free Mass (FFM) Or Lean Body Mass (LBM) Predicts Slightly Higher Attentiveness for Population},
  year = {2026},
  publisher = {The Journal of Citizen Science},
  url = {https://studies.crowdsourcingcures.org/study/cause-5955691-effect-1267-population-study},
  note = {Accessed: January 3, 2026}
}
Chicago/Turabian
Sinn, Mike P. "Higher Fat-Free Mass (FFM) Or Lean Body Mass (LBM) Predicts Slightly Higher Attentiveness for Population." The Journal of Citizen Science. Accessed January 3, 2026. https://studies.crowdsourcingcures.org/study/cause-5955691-effect-1267-population-study.