Premium measurement · InBody InGrip
InGrip is a separate hand dynamometer. It directly measures the maximum force of a short squeeze for each hand; the result is not derived from bioimpedance or muscle mass. Within a Premium visit it is linked to InBody, so you can see a functional performance next to body structure.
Measurement principle
InBody estimates body composition through bioimpedance. InGrip uses an adjustable handle and a load-cell sensor that captures the highest force during a short squeeze. It therefore measures the ability of the hand and forearm to produce maximal voluntary force under this protocol.
In clinical and population settings, grip is used as a practical indicator of muscle strength and functional reserve. It is not the same as whole-body strength, physical performance or the amount of muscle. That is why it is most useful alongside muscle mass, pain, everyday function and a repeated trend.
Visual guide
The visuals separate directly measured force, the best-attempt summary and the body-weight-derived ratio. Illustrative numbers are not reference norms.
Directly measured
Portal summary
35 / 70 × 100 = 50.0%
35 / 80 × 100 = 43.8%
Muscle stable · strength stable
Structure and performance are both stable.
Muscle stable · strength falling
Review pain, fatigue, protocol and the repeated trend.
Muscle falling · strength stable
Functional performance is holding for now; keep following it.
Muscle falling · strength falling
A reason to review routine, function and potentially seek professional assessment.
Fields in the portal and report
Each field answers a slightly different question. Kilograms, side difference and HGS/WT are not three independent measurements.
Four directly measured maximal squeezes: L1, L2, R1 and R2.
A few tenths of a kilogram can be ordinary attempt variability. Keep handle setting, posture, instruction and order consistent for a trend.
Detailed value guide →The summary uses the best valid attempt for each hand while retaining the original attempts.
One best attempt is convenient, not error-free. Follow a repeated trend rather than a change at display-resolution level.
Detailed value guide →The percentage difference between the better right- and left-hand results.
The dominant hand is stronger on average, but there is no universal pathological cut-off. A new difference with pain or loss of function matters more.
Detailed value guide →The best grip divided by body weight and expressed as a percentage.
The ratio changes when weight changes even if force does not. It is most useful for your own trend, not as a universally fair comparison between people of different size.
Detailed value guide →Practical interpretation
Use the same handle span, upright standing posture, straight arms slightly away from the body and a gradual build-up of force. Pain or an uncertain grip changes the result.
The best attempt summarises performance, while spread between attempts shows how consistently the test ran. Read side difference with dominance and history.
Strength can rise without more muscle mass and vice versa. Only the combined development of structure, performance and everyday function tells a useful story.
When not to make a maximal attempt
Do not perform a maximal squeeze with acute pain, swelling, a recent hand injury or operation, marked tingling or numbness unless advised by a professional. Sudden one-sided weakness, especially with facial droop, speech difficulty or another neurological symptom, requires urgent medical assessment.
Evidence and references
InBody Co., Ltd. · 2024
Official measurement procedure, standing posture, handle setting, range, accuracy and maximal-attempt safety.
InGrip – official product information
InBody · current
Manufacturer information on the load-cell sensor, adjustable handle and repeatable hand placement.
InGrip integration and result-sheet workflow
InBody Japan · current
Two attempts per hand, transfer of the best result into the InBody workflow and the HGS/WT calculation.
Sarcopenia: revised European consensus on definition and diagnosis (EWGSOP2)
Age and Ageing · 2019
Muscle strength as the first step in sarcopenia assessment; 27/16 kg are clinical context from a defined protocol, not universal InGrip norms.
A review of the measurement of grip strength in clinical and epidemiological studies
Age and Ageing · 2011
Why device, posture, handle setting, instructions, number of attempts and summary statistic all affect the result.
Measurement and Interpretation of Handgrip Strength for Research on Sarcopenia and Osteoporosis
Journal of Bone Metabolism · 2020
A review of protocols, references and the limits of transferring results between populations and dynamometers.
Upper-limb strength asymmetry meta-analysis
Scientific Reports · 2025
The dominant side is stronger on average, but individual variation is too wide for a simple diagnostic rule.
International norms for adult handgrip strength
Journal of Sport and Health Science · 2024
Large population data confirm effects of age, sex, region and body size; norms do not transfer automatically to another protocol.
Handgrip strength and health outcomes in the PURE study
The Lancet · 2015
Population-level associations between lower strength and adverse outcomes, not an individual prognosis or proof of causality.
Related reading
Premium
A Premium measurement presents the strength of both hands next to InBody, blood pressure and MaxPulse. It is not another bioimpedance value, but a separate dynamometer result linked into one visit.