Where does “leg day” come from?

leg day (English) comes from English day, from Middle English day, from Old English dæġ, from Proto-West Germanic dag, from Proto-Germanic dagaz, from Proto-Indo-European dʰegʷʰ- — to burn; warm, hot.

leg day (English): A day dedicated to leg exercises

Definitions

  1. A day dedicated to leg exercises

Ancestry of “leg day”, step by step

leg day traces back through two separate lines of ancestry.

via English day

StepLanguageWordMeaning
1EnglishdayAny period of 24 hours; A period from midnight to...
2Middle Englishdayday; daylight, sunlight; epoch, age, period
3Old Englishdæġday, daytime
4Proto-West Germanicdagday
5Proto-Germanicdagazday; name of the D-rune
6Proto-Indo-Europeandʰegʷʰ-to burn; warm, hot

via English leg

StepLanguageWordMeaning
1EnglishlegA limb or appendage that an animal uses for...
2Middle Englishlegleg, limb; shank, shin; leg
3Old Norseleggrleg, stem
4Proto-Germaniclagjazleg, thigh
5Proto-Indo-European(ǝ)lak-
Every word from Proto-Indo-European dʰegʷʰ-Every word from Proto-Germanic dagazEvery word from Proto-West Germanic dag