10 FEB 2021 by ideonexus

## Media Algorithms Keep You in a Bubble

Engagement algorithms are simple. If you, the user, have engaged with a certain topic in the past, you are likely to engage in the future. So when a new piece of content is created on the platform that belongs to that topic, why not show it to you? You might even give it a thumbs up (or like, or heart). This selection for engagement places you, the user, in an engagement maxima. You are maximally engaged given the topics you have expressed interest in in the past. But what happens after a f...
04 MAR 2015 by ideonexus

## An Algorithm for Predicting Longevity

For the test, participants exercised on a treadmill at increasing speed and incline. While they were exercising, the researches measured peak heart rate (%MPHR) and their ability to withstand physical exertion. On that latter point, they measured metabolic equivalents, or METs, which gauges how much energy the body expends during exercise. The more intense the exercise, the higher the METs (e.g. slow walking = ~2 METs, whereas running = ~8 METs). [...] FIT Treadmill Score = %MPHR 12(M...
1  notes

You can get your MPHR for your age here. I found a chart of METS here for various exercises.

 Activity METS Activity METS Aerobic Dancing 6.0 Running 12 min/mile 8.5 Backpacking 7.0 Racquetball 8.0 Badminton 7.0 Rugby 8.3 Basketball 6.0 Skating ice/roller 7.0 Bicycling - 24mph 5.0 Skiing cross country 8.0 Calisthenics 4.5 Soccer 8.0 Golf 5.0 Softball 5.0 Gymnastics 5.5 Swimming 6.0 Handball 8.0 Tennis 7.0 Hockey 8.0 Volleyball 4.0 Horse riding 3.5 Walking 3.5 Running 8 min/mile 12.5 Weight lifting 4.5

Bruce Protocol

Stage Minutes % grade km/h MPH METS
1 3 10 2.7 1.7 5
2 3 12 4.0 2.5 7
3 3 14 5.4 3.4 10
4 3 16 6.7 4.2 13
5 3 18 8.0 5.0 15
6 3 20 8.8 5.5 18
7 3 22 9.6 6.0 20

Total Durations = 21 minutes

So, if I'm understanding this correctly. If I reach a 160 heart rate out of 179.0 MPHR predicted for my 41 years of age while running 12 minute miles worth 8.5 METS. My score would be:

83.7 12(8.5) - 4(41) = 21.7

The same heart rate for my age running 8 minute miles:

83.7 12(8.5) - 4(41) = 69.7