▁movement . ▁D iff icult y ▁can ▁also ▁be ▁increased ▁by ▁adding ▁further ▁resistance , ▁either ▁in ▁the ▁form ▁of ▁weights ▁attached ▁to ▁the ▁tor so ; ▁such ▁as ▁a ▁weight ed ▁vest , ▁attached ▁to ▁the ▁legs , ▁or ▁resistance ▁bands . ▁ ▁R isk ▁ ▁Ca ution ▁should ▁be ▁taken ▁not ▁to ▁have ▁one ' s ▁body ▁susp ended ▁in ▁an ▁ups ide - down ▁position ▁for ▁very ▁long ▁periods ▁of ▁time , ▁since ▁the ▁human ▁body ▁la cks ▁a ▁design ▁for ▁forcing ▁back ▁blood ▁that ' s ▁running ▁to ▁the ▁head ▁( something ▁intended ▁by ▁force ▁of ▁gravity ▁to ▁take ▁care ▁of ▁itself ). ▁ ▁While ▁small ▁b outs ▁of ▁h anging ▁ups ide ▁down ▁have ▁not ▁proven ▁to ▁be ▁dangerous , ▁people ▁with ▁pre - ex isting ▁conditions ▁for ▁example ▁could ▁make ▁matters ▁worse ▁and ▁potentially ▁increase ▁the ▁risk ▁of , ▁among ▁others , ▁stroke ▁and ▁pul mon ary ▁o ed ema . ▁ ▁References ▁ ▁External ▁links ▁▁ ▁- ▁broken ▁link ▁ ▁Category : Body weight ▁exercise ▁Category : Weight ▁training ▁exer cis es <0x0A> </s> ▁The ▁ 2 0 1 6 ▁Malays ia ▁Masters ▁Grand ▁Prix ▁Gold ▁was ▁the ▁first ▁grand ▁prix ' s ▁bad m inton ▁tournament ▁of ▁the ▁ 2 0 1 6 ▁B WF ▁Grand ▁Prix ▁and ▁Grand ▁Prix ▁Gold . ▁The ▁tournament ▁was ▁held ▁at ▁the ▁S PI CE ▁Ind oor ▁Stadium ▁in ▁Pen ang , ▁Malays ia ▁from ▁ 1 9 – 2 4 ▁January ▁ 2 0 1 6 ▁and ▁had