07/20/2017
Fat vs muscle : the reality
Please share this so we can clear up this misconception‼️
I'm sure you've seen the images floating around the Internet showing what 5lbs of fat vs. 5lbs of muscle looks like. The replicas typically shown are a giant blob of fat next to a tiny mound of muscle, and you're inevitably left believing that 5lbs of fat takes up 5x more space than 5lbs of muscle.
This is a myth! 🚫In actuality, the density of mammalian skeletal muscle tissue is 1.06kg/L, while that of adipose tissue is 0.9196kg/L. In other words, fat only takes up 15% more space than muscle.
So 5lbs of fat weighs the same as 5lbs of muscle - obviously! But muscle is only slighter more dense than fat.
How did this misconception arise? I do not know, but I surmise that some sleazy marketer fabricated the idea to sell a product or service by dramatizing the visual effects of getting into shape. 🤷🏽♂️Whatever the case, this individual clearly never chased down the science like I did. Unfortunately, these images are so common nowadays that they aren't questioned and are passed along as fact. Exaggeration is never a good idea; people deserve the truth! 🙌🏽
References:
1️⃣Lohman TG. Applicability of body composition techniques and constants for children and youths. Exerc Sport Sci Rev. 1986;14:325-357
2️⃣Méndez J, Keys A. Density and composition of mammalian muscle. Metabolism. 1960;9:184-188
3️⃣Farvid MS, Ng TWK, Chan DC, Barrett PHR, Watts GF. Association of adoponectin and resistin with adipose tissue compartments, insulin resistance and dyslipidaemia. Diabetes Obes Megan. 2005;7:406-413.