slide 1 of 2, Quad sets, 1  Sit with your leg straight and supported on the floor or a firm bed. 2  Tighten the muscles on top of your thigh by pressing the back of your knee flat down to the floor. 3  Hold for about 6 seconds, then rest up to 10 seconds. 4  Do this for 8 to 12 repetitions several times a day.
Allograft definition, a tissue or organ obtained from one member of a species and grafted to a genetically dissimilar member of the same species. See more. Dictionary.com
Acrobatics (from Greek á¼ÎºÏÎ¿Î²Î±ÏÎ­Ï akrobateÅ, walk on tiptoe, strut) is the performance of extraordinary human feats of balance, agility, and motor coordination. It can be found in many of the performing arts, sports (sporting) events, and martial arts.