Your Muscles Got 10x Stronger. Your Bones Didn't.
Pin 01 · the gym
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One night, every muscle you can move gets ten times stronger. Doors come off their hinges, phones fold, and you can out-lift the world record... on paper. But your bones and tendons didn't get the upgrade.
What's real in this episode
- a young man's grip squeezes about 100 lb (NHANES).
- arm-wrestlers break their own upper-arm bones with normal muscles.
- tendons are built roughly 9x stronger than the muscles that pull on them.
- chimps are about 1.35x stronger per muscle, not 5x. Numbers marked 'on paper' are our own simple estimates.
Sources
- Grip strength (NHANES): Bohannon et al., AJOT 2019 — pmc.ncbi.nlm.nih.gov/articles/PMC6436115
- Muscle force per area: J Appl Physiol 2024 review — pubmed.ncbi.nlm.nih.gov/39169839
- Voluntary activation ~90%: Gandevia, Physiol Rev 2001 — pubmed.ncbi.nlm.nih.gov/11581501
- Arm-wrestling humerus fractures: Ogawa & Ui, J Trauma 1997 — pubmed.ncbi.nlm.nih.gov/9042875
- ECT/seizure fractures: Andrade et al., J Clin Psychiatry 2023
- Tendon safety factor: Ker et al. 1988; Cutts et al., J Anat 1991 — pubmed.ncbi.nlm.nih.gov/1917668
- Achilles loads in running: MSSE 2024 — pubmed.ncbi.nlm.nih.gov/38240495
- Bone remodeling cycle: Eriksen 2010 — pmc.ncbi.nlm.nih.gov/articles/PMC3028072
- Fastest pitch (105.8 mph) & strongest bite: Guinness World Records
- Throwing speed: Roach et al., Nature 2013; Fleisig et al. 2017
- Myostatin boy: Schuelke et al., NEJM 2004; cattle: McPherron & Lee, PNAS 1997
- Chimp strength ~1.35x: O'Neill et al., PNAS 2017 — pmc.ncbi.nlm.nih.gov/articles/PMC5514706
- Hysterical strength cases: Wise, Psychology Today 2010; Ikai & Steinhaus 1961
- Cough rib fractures: Hanak et al., Mayo Clin Proc 2005
