How would you use the bands with the door anchor to simulate pull ups? Close the door anchor under the bottom of a door close to the hinges. Lay down on your back with your feet away from the door. Adjust the tension by varying your distance from the door and perform a pull-up motion. Can this be attached to a squat rack as well or only anchored to a door? I think it could be done. However, you would have to test the connections. Depending on the intensity of the workout. those connections could snap. The perfect assistant for yoga, family fitness, physiotherapy, strength training, rehabilitation or Pilates in your life, to provide you with a pleasant experience in sports life. Pink: 1500*150*0.35mm(L/M/H) Yellow: 1500*150*0.35mm(L/M/H) Blue: 1500*150*0.35mm (L/M/H) Green: 1500*150*0.35mm(L/M/H) Purple: 1500*150*0.55mm(L/M/H) Advantages: Our Exercise Bands are durable. With a total length of 150 cm / 59 inches, it provides a full range of motion during exercise. So you'll have plenty of band length to take a couple wraps around your hands for more tension and to keep a better grip during your routine. Or just tie a knot in the band and you've got a loop band in a length that is perfect for your needs. If you need more resistance, just fold the band in half. Features: Colour: Pink, Blue, Green, Purple, Yellow Length: 4.92 Ft (150cm) Width: 5.90 in (15cm) Package Including: 5 x Flat Exercise Bands