The Al and Barrie Zesiger Sports and Fitness Center (informally known as the "Z Center") is the central athletics facility at the Massachusetts Institute of Technology since 2002. It is connected to Rockwell Cage, du Pont Gymnasium and the Johnson Athletic Center. MIT's Department of Athletics, Physical Education and Recreation (DAPER) administrative offices are also housed in the Z Center. It is 125,000 square feet (11,600 m²) designed by Kevin Roche and John Dinkeloo & Associates

Facilities include:

• 50-meter lap pool
• 25-yard instructional pool
• Two fitness floors
• Multi-activity court
• 6 squash courts
• Massage suite and stretching and exercise spaces