The number on the display has a decimal place. The research says a single reading is compatible with a real value across a 23-point span, and that the scale gets your change right about a quarter of the time.
The largest review ever done on it says exercise helps chronic back pain, with moderate certainty. The same body of research says something very different about a new episode — and almost nothing about which exercise.
Slowing the rep down is sold as the secret to growth. A 2025 meta-analysis of every study that varied only tempo found the difference was 0.09 — and it leaned the other way.
A new randomised trial measured thigh muscle by MRI before and after. The loss is real, lifting halved it, and the number that actually moved was protein.
One of the few things in the supplement aisle with an umbrella review behind it. Here is the dose, the timing, the size of the effect — and the one thing it is not doing.
Soreness is the most popular progress gauge in the gym and it is not measuring progress. Five times the work produced the same soreness — and growth turned up only after the damage stopped.
A vest adds a little to what exercise already does for fat. The thing it is actually sold for — protecting bone — got its best test in 150 people over twelve months, and failed it.
Thirty Japanese adults, sixteen weeks, and cognitive scores that rose and then fell again a month after the tablets stopped. An independent panel says nobody has repeated it.
The confident objection is that your gut destroys it. A six-month trial in 54 people says body stores rose by a third. The unanswered question is whether that does anything for you.
A panel convened because nobody could agree what zone 2 was. They agreed on a definition — and then wrote that the adaptations might not be unique to it. Meanwhile the calculators cannot find it on you.