The initial phase of building an aerobic base should be consistent with an individual's current fitness level, potentially starting with walking or cycling, possibly on a recumbent bike if lower back flexibility is limited.

“so that might just be again walking that could be incline walking that could be riding a bike and then even within riding a bike how do you do that well if a person doesn't have the the the um lower back flexibility and strength it might even be on a recumbent bike as opposed to just a regular stationary bike”