Have you ever done resisted push ups with three 30-lb resistance bands? You can absolutely get enough resistance for progressive overload with resistance bands/elastic tubing. And with the variable linear resistance inherent with that modality, it's even better. I would recommend you check out the Chiseled workout show on liveexercise.com to see just how effective bands can be; as effective as weights/machines.
Have you ever done resisted push ups with three 30-lb resistance bands? You can absolutely get enough resistance for progressive overload with resistance bands/elastic tubing. And with the variable linear resistance inherent with that modality, it's even better. I would recommend you check out the Chiseled workout show on liveexercise.com to see just how effective bands can be; as effective as weights/machines.