These leg exercises can be used by both men and women, and can help to tone the thighs, increase definition in the quads, increase strength of the legs, or build up the quad muscles. (best-leg-exercises.com)
All the fossil - fuel - free goodness of a push (reel) lawnmower with the superior strength of legs over arms in a bicycle. (treehugger.com)
Birds rely on the strength of their legs to leap into the air or run to gain speed for take - off. (newscientist.com)