Positive tendencies of arm-wrestling's expansion condition demand in its scientific study and determination of sportsmen's success factors. Such factors include strength of sportsman's forearm muscles' strength. The purpose of the research is comparative analysis of forearm movements' power characteristics of different qualification sportsmen and students, who do not practice arm-wrestling. Material and methods: in experiment 33 students of physical culture academy participated. The students were divided in two groups: experimental group-armwrestlers, (n=16, age 21.94±1.18 years), the second (control) group) (n=17, age 19.94±0.31 years)-students, who do not practice armwrestling. Depending on level of sportsmanship experimental group was divided into two subgroups: experienced sportsmen (n=5) and beginners (n=11). We used set of tests. In the tests we registered strength of flexing, extension, moving aside, forearm's pronation and supination by value of maximal weight in these movements. Results: higher strength of sportsmen, in comparison with control group, by all tested parameters has been confirmed (p<0,05). Especially greater sportsmen's strength is expressed with flexing of forearm. It reflects better physical fitness and illustrates specialized training in this kind of sports. Indices of strength's relation to mass improve visibility and permit to standardize the data for analysis and prognosis. Value of experienced sportsmen's flexing indices was more than 100%. It proves again importance of this movement for success in armwrestling. Analysis of correlation matrixes confirmed greater stability of sportsmen's condition. Reduction of functional tension happens at the account of 1.2-2.0 times increase of specific gravity of significant and confident correlations, as well as 2.48 times increase of synchronization indicators and 2 times increase of mean correlation coefficient. Conclusions: level of strength in flexing, extension, rotation and moving forearm aside is rather important for success in armwrestling. Usage of indices of strength-body mass relation is a promising way of selection and prognostication in armwrestling.