Field-test formulas for VO2 max put the same run at very different values
Field tests estimate VO2 max, the most oxygen the body can use per minute for each kilogram of body weight, from a timed...
Guides & How-tos · Worked examples · Real numbers
Health & Wellness guides
Step-by-step how-tos, head-to-head comparisons and honest roundups — every guide worked through with current figures, then backed by a RECATOOLS calculator or AI-directory entry so you can act on it.
498 guides published
17 topic areas
Latest guide Oct 2026
Science
40
Statistics
33
Cybersecurity
30
Business
19
Privacy & Data
17
Consumer Tech
14
ASEAN Tech
13
Personality
9
Cloud & Infra
8
Cyber Threat Intel
7
Sustainability
5
Advertisement
Calculated LDL reads lower on Friedewald's formula than on Martin-Hopkins at high triglycerides
A calculated LDL is total cholesterol minus HDL minus an estimate of the cholesterol in VLDL, and the Friedewald, Martin...
A bathroom scale's rounding can shift a sweat-rate test by a tenth of a litre an hour
Sweat rate is body weight before exercise minus weight after, plus fluid drunk, minus urine, divided by the hours. On a...
Advertisement
How many weeks you have left, by Singapore and Malaysian life tables
A Singapore resident aged 65 can expect about 1,127 more weeks on the 2025 life tables, 141 more than the figure at birt...
A low-sugar drink can still get a Nutri-Grade D
Singapore's Nutri-Grade letter grades drinks on sugar and saturated fat, and the worse of the two sets the grade — so a...
Same Body, Two Verdicts: What the Drink-Drive Limit Actually Depends On
At 0.058% blood alcohol you are under the limit in Singapore and over it in Johor Bahru. Malaysia cut its limit from 0.0...
Advertisement