( ( ( ( ( ( Keeping ( your ( working ( upper ( arm close ) ) ) ) ) ( to ( your body ) ) ) , ) and ) ( ( flexing ( your triceps ) ) ( as ( you ( ( ( ( ( go , ) ( ( ( extend ( your ( working arm ) ) ) back ) ( as ( far ( as possible ) ) ) ) ) , ) and ) ( flex ( your ( triceps muscles ) ) ) ) ) ) ) ) . )
(ROOT (S (S (VP (VBG Keeping) (NP (PRP$ your) (JJ working) (JJ upper) (NN arm) (NN close)) (PP (TO to) (NP (PRP$ your) (NN body))))) (, ,) (CC and) (S (VP (VBG flexing) (NP (PRP$ your) (NNS triceps)) (SBAR (IN as) (S (NP (PRP you)) (VP (VP (VB go)) (, ,) (VP (VB extend) (NP (PRP$ your) (VBG working) (NN arm)) (ADVP (RB back)) (SBAR (IN as) (FRAG (ADJP (RB far) (RB as) (JJ possible))))) (, ,) (CC and) (VP (VB flex) (NP (PRP$ your) (JJ triceps) (NNS muscles)))))))) (. .)))
Keeping your working upper arm close to your body, and flexing your triceps as you go, extend your working arm back as far as possible, and flex your triceps muscles.
(ROOT (S (NP (DT The) (NNS triceps)) (VP (VBP help) (S (NP (DT the) (NN body)) (VP (VB extend) (NP (DT the) (NN arm))))) (. .)))