wow,really very wonderfull bicycles..we can obviously can doing running excecise this bycycles. i am really inspired for your challenge.. i think that,its doing for a big dare needs this challenge.you receive a good challenge because you are a talented person in this platform.so,everything possible for you.its very good concept. I support your goid work.thanks to sharing good post..very well done..my dear friend.. @leggy23 i hope that,you not forget me.. may god bless you..i seen your future very bright..my blessing stayed with you..