Mythbusters Episode 4: Why Longer Isn’t Better, or, How Long Should You Hold A Plank For.
πππ§βπ¦ π§πππ πππ’π¨π§ π£πππ‘π πππππππ‘πππ¦β£ β£ You know the sort, on day 1 you hold a plank for 30 seconds,…
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