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The '5kg in 50 days' Diet!

Thunderf00t · 205.1K views · 2017-07-16 · 25:22

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Overview

Thunderf00t applies a simple energy mass balance to weight loss, showing how much exercise is needed to burn off extra calories compared with eating less. He concludes that cutting intake is the easier route and that hunger fades after the first week.

On Hacker News

HN cites it in arguments that exercise alone is an ineffective way to lose weight and that caloric deficit matters most.

Discussed on HN; no positive recommendation is recorded in this export · HN mentions 2021–2025

Topics

Nutrition & diet scienceFitness, sleep & longevityFundamental physics
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calorie deficitexercisedietenergy balancethunderf00t

What people said

burnt-resistor · 2025-05 · Reference

Dangerous, inefficient, and time-consuming compared to moderate exercise and eating less. Caloric restriction is, by far, more effective than exercise for net deficit. Thunderf00t did a video on this. [VIDEO]

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hi-v-rocknroll · 2024-08 · Reference

Yep, it's basically a distributed gym membership without the gym except for a single expiring, proprietary widget that lives on your property. It's largely ineffective to lose weight by exercising, and so much easier to reduce caloric intake. [VIDEO]

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hi-v-rocknroll · 2024-04 · Reference

Just don't try to lose weight primarily through increasing activity. Activity is great for other reasons, but the human body is just too damn efficient and it would consume too much time. Caloric deficit is the best primary way. The '5kg in 50 days' Diet! (2017) [VIDEO]

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Sources

Video by Thunderf00t, played through YouTube.

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