I have observed this too, to some degree.

Many years ago, while visiting at St. Mary's, I heard - in person - a sermon by Fr. Angles in which he took to task the women who wore make-up and such.  He said it was pure vanity and sinful.  Personally, I don't see something wrong with wearing a little mascara and lip gloss, particularly for an evening with your husband.  

As for the weight issue, not sure.  I have seen all shapes and sizes at chapels.  

We all get old and ugly, but not fat and sloppily dressed.

A lot of traditional Catholic families are poor.  So am I and my family.  It is one of those paradoxes of modern agriculture that poor people eat high-fat, high-calorie foods, because they are the cheapest.  (It's the difference between McDonald's and Wendys.)  As a consequence, poor people can become really fat.

In addition, with large families there is not a lot of time for exercising, and intensive exercising can burn lots of calories.  However, exercising takes time, and large families do not have a lot of "extra time" on their hands.

One way to lose weight, in addition to eating very healthy, is to drink ice-cold water.  Drinking 64 to 80 ounces of water per day at 0 degrees Celsius will burn 100 additional food calories.  (Your body will need to raise that water to 37.5 degrees Celsius, unless you are peeing-out ice water, in which case you have other problems!)  A pound of fat is 3500 calories.  Running a marathon (26.2 miles) will only burn 2400 calories.  I found that fasting helps a lot.  The experts say not to "skip meals," but it does work if you stay active.  Climbing stairs is an excellent way to burn calories.  If you have stairs in your home and you climb them 20 times a day, then you have climbed 160 feet or more (20 times 8 feet) in one day.  For instance, if you are an 80 kg person, you will burn 80 kg * 10 m/s^2 * 2 meters = 1600 Joules climbing one flight of stairs, which is equal to 6720 physical calories, which is equal to 6.7 food calories.  Climb those stairs 10 times a day, and you will have burned at least 60 to 70 calories.

In fact, there's an interesting gradation I've noticed: the most beautiful women are at Novus Ordo Masses, there are fewer at FSSP Masses, and even fewer at SSPX Masses...

Who cares?  According to you, 99.99% of NOs, 95% of FSSP-ers, and 92% of SSPX-ers are going to hell!  LOL!

Seriously, modern life is hard, and getting harder.  I cannot imagine what it is like to be responsible for little ones in such an insane era.

I can't help but notice that many traditionalist women seem to let themselves go physically. (In fact, there's an interesting gradation I've noticed: the most beautiful women are at Novus Ordo Masses, there are fewer at FSSP Masses, and even fewer at SSPX Masses.) I see lots of fat bodies and haggard faces at Mass, not to mention frumpy attire.

This reminds me of something I've always heard from other guys. Some complain women dress too immodestly at Mass and that they may be an occasion of sin, or at least a distraction. I wish I could tell them to go to the Chapels of which you speak, so that they can be relieved of their scruples.  

Seriously though, you are not the first to say such a thing. I do not agree. I have heard similar things before, but all I can respond to such observations [and to the aforementioned complaints] is: "Why would you look at anything else other than the Altar or your Missal or the Priest at Mass?"

But that's just me.

We all have peripheral vision.  Habitually looking around is a different matter.

FWIW, noticing something does not necessarily mean we need to have a public discussion about it.

gladius_veritatis,

Is there a premium on obnoxiousness?