Heavy leg presses, which exercise the largest muscles in your body.
http://en.wikipedia.org/wiki/Leg_press
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Currently own: -
Z4 ///M Coupe with Black BBS CH-wheels, E36 M3 and G01 X3 M40i.
Previously owned: - Z4 Coupe 3.0si, Z3 ///M Coupe S54, Z3 ///M Coupe S52, ///M6, 635csi, 533i, 323i, F25 X3 with ///M Sports Package