I have purchase both the shake weight for woman , and version for man . . they do the same thing , and do give you the work out that will `` over time '' give you definition and size . . I dont think the market need a Mens version , and to charge $ 20 more for it be label for man do not convince I either . I purchase to see if it be in fact a drastic improvement verse the original , and I didnt notice any such variable that would make I recommend it over the ORIGINAL Shake weight that be market towards woman . I mean before the male version come out , Charles Barkley a TNT guy be co-sign the female version during the NBA season . . Nuff Said ! lol !