Hand grip strength, the simple squeeze test long used as a window into overall health, has finally been mapped for the Egyptian population. A large cross-sectional, multi-centre, community-based study coordinated through the Egyptian Academy of Bone and Muscle Health has established the first comprehensive age- and gender-stratified normative database and percentile reference values for hand grip strength in healthy Egyptian adults. The findings, published in Egyptian Rheumatology and Rehabilitation, fill a gap that clinicians in the country have faced for years: without locally derived reference curves, they had to rely on Western or Asian standards whose applicability to Egyptian patients was uncertain.
The research team evaluated 2,247 healthy Egyptian participants aged over 18, comprising 900 men (40.1 percent) and 1,347 women (59.9 percent), recruited through a stratified convenience sampling framework across three governorates representing Lower, Middle, and Upper Egypt. Participants were carefully screened to ensure the data reflected a healthy baseline. Anyone with current pain, active inflammation, or recent injury in either hand or upper limb was excluded, as were people with orthopedic deformity, major upper limb surgery, inflammatory arthritis, symptomatic hand osteoarthritis, peripheral neuropathy, stroke, or any chronic systemic condition known to compromise muscle strength. Individuals at high sarcopenia risk, defined by a SARC-F score above 4, and those with functional disability on the validated Arabic Health Assessment Questionnaire were also removed from the final analysis.
Measurements followed a tightly standardized protocol. Grip force was recorded in kilograms with a CAMRY digital hand dynamometer, with the adjustable handle fixed at position 2 for every participant to guarantee cross-sectional uniformity. Participants sat on an armless chair with the shoulder adducted, the elbow flexed at a strict 90 degrees, and the forearm neutral. Each hand performed three maximum squeezes of three to five seconds, alternating limbs with one-minute rest intervals, and the mean of the three trials was recorded as the final value. Dynamometers were calibrated weekly against known reference weights, and any device exposed to mechanical shock was withdrawn and recalibrated by biomedical engineers before reuse.
The headline result is a pronounced gender dimorphism. Men demonstrated significantly higher strength than women across all age categories, with an overall mean right-hand grip of 36.2 ± 17.3 kg for men versus 24.5 ± 9.6 kg for women, and left-hand means of 33.7 ± 17.3 kg versus 22.6 ± 8.9 kg, all differences significant at p < 0.001. In both sexes, performance peaked in the youngest cohort, the 18-to-30-year bracket, where men (n = 447) averaged 46.6 ± 17.5 kg on the right hand and women (n = 853) averaged 25.8 ± 10.8 kg. From that peak, mean values declined progressively across each successive decade, reaching lifetime lows after age 71 of 21.2 ± 1.4 kg in men and 21.9 ± 2.6 kg in women.
The pace of that decline, however, differed sharply between the sexes, and this is where the study offers its most intriguing physiological insight. The negative correlation between age and right-hand grip strength was markedly steeper in men (r = -0.580) than in women (r = -0.184), both statistically significant. Women’s right-hand grip effectively stabilized on a plateau between ages 51 and 71+, holding tightly between roughly 20.7 and 22.1 kg. The authors suggest this prolonged maintenance of muscular function may partly reflect the protective, anabolic effects of circulating estrogen on muscle mass and contractility before menopause, and they caution that a drop in a female patient’s grip percentile during these mid-life decades should be read as a warning sign of underlying pathology rather than dismissed as normal aging. These are associations from a single cross-sectional snapshot, however, and the researchers themselves call for longitudinal studies to track changes over time.
The percentile analysis revealed a striking divergence at the population extremes. The weakest stratum, the 5th percentile, remained remarkably stable across the lifespan: young weak men scored 19.0 kg, nearly identical to the 18.8 kg recorded in old weak men. The collapse instead occurred among high performers. The male 95th percentile plummeted by an absolute 51.1 kg across the lifespan, from 75.0 kg down to 23.9 kg, meaning the global age-related drop in male grip strength was driven almost entirely by the strongest men becoming substantially weaker. By the oldest age bracket, the gender gap disappeared altogether: a woman over 71 at the 50th percentile scored 21.5 kg, actually exceeding the 20.8 kg median of her male counterpart. The authors also note that variability narrowed dramatically with age, with standard deviations contracting to as little as ± 1.4 kg in men over 71, suggesting that advanced aging acts as a physical equalizer across individual conditioning levels.
Correlation analysis with anthropometric measures uncovered distinct sex-specific structural patterns. Dominant hand size, measured with sliding calipers from the distal wrist crease to the middle fingertip, was a positive correlate in both sexes (men: r = 0.538; women: r = 0.229), consistent with the mechanical leverage advantage of a larger hand frame, and right calf circumference also correlated positively with grip output in both sexes, likely serving as a proxy for total skeletal muscle mass. Adiposity metrics diverged by sex: men showed weak but significant negative correlations between right-hand grip and BMI (r = -0.144) alongside a weak positive correlation with waist circumference (r = 0.106), whereas in women neither BMI (r = -0.047) nor waist circumference (r = -0.011) reached statistical significance. Right- and left-hand grip correlated strongly within individuals, most robustly in men (r = 0.962), reinforcing the view of grip strength as an integrated measure of neuromuscular capability rather than a localized attribute.
Socio-demographic stratification added a layer that demands careful interpretation. Hand grip strength varied significantly by marital status and occupation (both p < 0.001), with single individuals and students posting the highest values: single men averaged 46.6 ± 17.4 kg on the right hand and male students 50.5 ± 17.6 kg, while male skilled manual workers averaged only 26.8 kg, below office workers at 28.5 kg. The authors argue these gradients are almost certainly confounded by age, since single and student statuses skew young while widowhood skews old; the widowed cohort’s low values, such as 19.2 kg in widowed men and 18.3 kg in widowed women, likely reflect age-related sarcopenia rather than any effect of marital status itself. They also flag severe sample-size imbalances in the divorced, widowed, and housewife subgroups, with the latter numbering only 11 participants, and recommend age-adjusted multivariate regression in future work.
The clinical payoff lies in risk stratification. The 5th percentile of the healthy age-matched population is proposed as the diagnostic threshold for weakness, a benchmark for screening muscle wasting, frailty, and sarcopenia risk. The Egyptian data show why imported cut-offs can misfire: the 5th percentile for Egyptian women spans roughly 10.4 to 12.0 kg in mid-to-late life, so a Western threshold of 16 kg would sweep large numbers of healthy, normal Egyptian women into a false frailty category. For comparison, the authors cite peak dominant-hand averages of 49.7 kg for young men in United States NIH Toolbox data and peaks between 49 and 52 kg in UK Biobank British centiles, with women’s baseline peaks near 31 kg in Britain and the United States and 34.5 kg in Germany, all well above the Egyptian peaks of 46.6 kg for men and 25.8 kg for women.
The team acknowledges limitations alongside its strengths. The fixed handle position, chosen for protocol uniformity, departs from best-practice guidance that tailors the grip span to hand size and may have slightly underestimated strength in participants with unusually large or small hands. The cross-sectional design cannot establish how individual trajectories unfold over time, and the convenience sampling framework may limit generalizability. Still, as the first population-specific reference standard for Egypt, the database gives clinicians a locally grounded tool for interpreting a cheap, quick, and reproducible test, and it sets the stage for longitudinal follow-up and for investigating the lifestyle, genetic, or socioeconomic factors behind the distinctive mid-life plateau observed in Egyptian women.
Subject of Research: Age- and gender-stratified normative hand grip strength reference values in a healthy Egyptian adult population
Article Title: Hand grip strength: age- and gender-stratified normative data in Egyptian population-based study by the Egyptian Academy of Bone and Muscle Health
Article References: El Miedany, Y., Elgaafary, M., Elwakil, W., Elziaty, R. A., Sadek, R., Abd Alrahman, R. H., Abdelrahman, S. H., Omar, M. E., Radwan, A. R., Hassan, W., Yahia, M., Elsaeid, O. G., Elbanhawy, A., Abdrabo, M., El Koumy, M., Qutob, I., Samir, B., & Mahran, S. (2026). Hand grip strength: age- and gender-stratified normative data in Egyptian population-based study by the Egyptian Academy of Bone and Muscle Health. Egyptian Rheumatology and Rehabilitation, 53(1), Article 77. https://doi.org/10.1186/s43166-026-00439-4
Image Credits: AI Generated
DOI: 10.1186/s43166-026-00439-4
Keywords: hand grip strength, normative data, Egypt, sarcopenia, frailty, anthropometry, aging, gender differences, dynamometry, cross-sectional study, muscle function, percentile reference values
News Source: Beatrice Stafford. (October 29, 2026). Egyptian Study Sets First Age- and Gender-Stratified Hand Grip Strength Norms. Scienmag.
