{"id":4918,"date":"2026-10-22T04:47:09","date_gmt":"2026-10-22T04:47:09","guid":{"rendered":"https:\/\/www.inbody.in\/blog\/skeletal-muscle-mass-normal-range-inbody"},"modified":"2026-10-22T07:52:34","modified_gmt":"2026-10-22T07:52:34","slug":"skeletal-muscle-mass-normal-range-inbody","status":"publish","type":"post","link":"https:\/\/www.inbody.in\/blog\/skeletal-muscle-mass-normal-range-inbody","title":{"rendered":"Skeletal Muscle Mass (SMM): Normal Range on InBody"},"content":{"rendered":"

Skeletal Muscle Mass (SMM): Normal Range on InBody<\/h2>\n

SMM on an InBody report stands for skeletal muscle mass<\/strong>: the weight, in kilograms, of the muscle attached to your bones, the kind you use to walk, lift and climb stairs. The skeletal muscle mass normal range<\/strong> on an InBody sheet is not one fixed number. It is a bar, and InBody’s training manual defines normal as 90% to 110%<\/strong> of the standard muscle for your height. If your bar stops short of 90, the sheet marks you as “Under”.<\/p>\n

This guide explains how that bar works, why a fixed “normal SMM in kg” chart can mislead, how SMM differs from the skeletal muscle index used to screen for sarcopenia, and what to do with your number.<\/p>\n

What SMM Measures (and What It Does Not)<\/h2>\n

Your body has three kinds of muscle: skeletal muscle, heart muscle and the smooth muscle in organs such as the gut. Only skeletal muscle responds to training, and only skeletal muscle is counted in SMM.<\/p>\n

SMM is also not the same as lean body mass. Lean body mass, which current InBody sheets call Fat Free Mass, includes all your body water, organs, skin and bone. SMM is one part of it, so it is always the smaller number. If you are comparing the two, our post on lean body mass vs muscle<\/a> covers the difference.<\/p>\n

One more caveat. A bioimpedance analyser such as InBody does not see muscle directly. As the European sarcopenia consensus (EWGSOP2)<\/a> explains, BIA estimates muscle from how the body conducts a small current, using equations calibrated against reference scans. It is a good estimate, and it is best used for trends on the same device.<\/p>\n

How InBody Shows the SMM Normal Range<\/h2>\n

Look at the Muscle-Fat Analysis<\/strong> section, three horizontal bars under the main table: Weight, SMM and Body Fat Mass. Each bar has a percentage scale along the top.<\/p>\n

The InBody 770 training manual<\/a> explains the scale. A bar reaching 100% means you have the average skeletal muscle for a person of your height at a standard weight. The normal range of SMM is 90% to 110% of that standard. The InBody 270 and 370S result sheets used across India print the same 90\u2013110% normal band. The number printed at the end of the bar is your actual SMM in kilograms.<\/p>\n\n\n\n\n\n\n\n
Where your SMM bar ends<\/th>\nWhat it means on the sheet<\/th>\nRead it with<\/th>\n<\/tr>\n<\/thead>\n
Below 90%<\/td>\n“Under”: less muscle than standard for your height<\/td>\nStrength and function; your doctor if you are older or losing weight<\/td>\n<\/tr>\n
90% to 110%<\/td>\nNormal for your height<\/td>\nYour trend over time<\/td>\n<\/tr>\n
Above 110%<\/td>\nMore muscle than standard, common in people who train<\/td>\nThe ECW ratio, to rule out swelling inflating the reading<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

This is why a single chart of “normal SMM for men is X kg” is less useful than your own bar. Two healthy women of 150 cm and 175 cm should not have the same muscle in kilograms. The bar adjusts for that.<\/p>\n

\n\"InBody
InBody 270 sample sheet: the SMM bar ends before 90%, while the body fat bar runs far past normal<\/figcaption><\/figure>\n

Reading the Three Bars Together<\/h2>\n

The SMM bar means most when you read it against the other two. InBody’s manual teaches this with letter shapes, drawn by joining the ends of the Weight, SMM and Body Fat Mass bars.<\/p>\n