Weightlifting system

An exercise system comprising:

• a base structure comprising:
• a first cross brace comprising first cross brace mounting plates disposed at each end of the first cross brace;
• a pair of base guide rail supports secured to and extending substantially orthogonal from the first cross brace, wherein each of the pair of base guide rail supports comprise a pair of base guide rail receivers;
• a pair of base pulley supports secured to and extending substantially orthogonal from the first cross brace, wherein each of the pair of base pulley supports further comprises:
• a pulley-support pulley housing;
• and
• a pair of pulley-support pulleys rotatably secured to the pulley-support pulley housing;
• and
• a second cross brace comprising:
• a central portion substantially parallel to the first cross brace, wherein the central portion is secured to the pair of base guide rail supports and the pair of base pulley supports;
• two end portions disposed at an angle to the central portion, wherein each of the two end portions terminate at second cross brace mounting plates disposed at each end of the two end portions;
• two central-portion pulley housings;
• and
• two central-portion pulleys each rotatably secured to a respective one of the two central-portion pulley housings;
• and
• a pair of weight stack units configured to seat upon the pair of base guide rail supports, respectively, wherein each of the pair of weight stack units comprises:
• a pair of weight stack guide rails, wherein each of the pair of weight stack guide rails are secured at lower ends to a respective one of the pair of base guide rail receivers on a same one of the pair of base guide rail supports;
• a movable weight stack slidably engaged with the pair of weight stack guide rails;
• a lifting rod selectively engageable with the movable weight stack;
• and
• a weight stack pulley connected to the lifting rod;
• wherein the first cross brace, the pair of base guide rail supports, the pair of base pulley supports, and the second cross brace each reside within a first single plane.