Rhombus plural: rhombi. Definition: A quadrilateral with all four sides equal in length. Try this Drag the orange dots on each vertex to reshape the rhombus. Notice how the four sides remain the same length and the opposite sides remain parallel. A rhombus is actually just a special type of parallelogram. Recall that in a parallelogram each pair of opposite sides are equal in length. With a rhombus, all four sides are the same length.It therefore has all the properties of a parallelogram. See Definition of a parallelogram. Its a bit like a square that can 'lean over' and the interior angles need not be 90Â°. Sometimes called a 'diamond' or 'lozenge' shape.
Flexibility Exercise. Adults can improve joint range of motion by engaging in flexibility exercises two to three days a week. Each stretch should be held for 10 to 30 seconds and repeated two to four times. Proprioceptive neuromuscular facilitation, or PNF, and static stretching provide the greatest flexibility gains.dults need at least 150 minutes of cardiovascular exercise each week. According to the guidelines, moderate or intense levels of exercise can be used to meet the cardiovascular recommendations.
For building strength, the American Council on Exercise recommends doing two to six sets of four to eight repetitions each, with two to five minutes of rest between each set. For bodybuilders, ACE recommends three to six sets of six to 12 repetitions each, with 30 to 90 seconds of rest between each set.