R4 Week 3 group stats

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Out of 516 people who have signed up for Round 4 of 90days, 158 people have checked in for Week 2. Let’s take a look at how things have changed for us since the start of the round.

 

Overall weight distribution

Here’s the initial weight distribution of everyone who signed up originally and those who have checked in for Weeks 1, 2, and 3:

 

And if we look at only the people who have checked in for Week 3, we get:

 

(lbs) Week 0 Week 1 Week 2 Week 3
Avg 208.8 206.8 204.7 204.0
St Dev 52.9 55.5 54.0 50.6

 

(kg) Week 0 Week 1 Week 2 Week 3
Avg 94.7 93.8 92.8 92.5
St Dev 24.0 25.2 24.5 23.0

We’ve lost an average of 4.82 lbs (2.19 kg) per person over the last three weeks. As a group, we’ve lost a total of 761 lbs (345 kg)! (For comparison, a rule of thumb for a healthy weight loss rate is 1-2 lbs (0.45-0.91 kg) per week, which would be 3-6 lbs (1.36-1.81 kg) for three weeks of progress. So we’re right on track so far!)

Fitting our weights to a normal distribution, it’s a little easier to see the slight shift in our group weight:

 

 

Weight distribution by gender

Let’s break this down by gender again. Looking at only the people who checked in for Week 3, there were 84 women and 66 men. (The remaining 8 check-ins have not filled out the signup form, so theirĀ  gender is unknown and they have been excluded from the plots below.)

The weight distributions for both genders are shown below.

 

Women

Women have lost an average of 4.00 lbs (1.81 kg) each since the start of the round, or a total of 336 lbs (153 kg) lost for these 84 women!

 

Men

Men have lost an average of 5.75 lbs (2.61 kg) each since the start of the round, or a total of 425 lbs (193 kg) lost for these 66 men!

 

 

 

Distribution of weight change

Here’s the distribution of weight change since the start of the round for everyone who checked in.

 

 

Broken down by gender:

 

 

Are any diets or exercises doing better than others?

On the sign-up form, there was a page of optional questions about which types of diets or exercises we were planning on following. This data isn’t necessarily very accurate, because there is no guarantee that a person actually follows the diet or exercise that they said they would. Plus, the questions were optional, so not everyone answered them. Still, it’s fun to look at some of the info that we can get from this.

On the following plots, the average weight lost is shown for each group of people. Note that some groups have very low check-in counts. The average values are more meaningful for the larger groups.

 

Diet types

 

Calorie trackers

 

Exercise types

 

Activity trackers

 

 

Who’s still with us?

On the following plots, the people who checked in for Week 2 are compared with the people who did not check in. The plots are ordered by percentage of people retained. For example, of the 242 people who listed their goal as “reduce body fat percentage,” 90 people checked in (41%). But only 2 out of the 5 people who chose “gain weight” checked in (29%).

Goals

 

Diet types

 

Calorie trackers

 

Exercise types

 

Activity trackers