Proper Exercise Biomechanics
Upon first glance, bodyweight and real outdoor exercise equipment look the same, and you ask, how different can someone make a vertical knee raise (VKR) or a back extension bench? The answer is very different! Approximately 80% of bodyweight outdoor equipment is designed with improper exercise biomechanics, meaning the design does not account for the way the user's body moves when using the equipment and the strain that the equipment is causing the body.
For example, in an indoor commercial gym and real outdoor exercise equipment, the back plate of a VKR is angled backward approximately 20 degrees. However, most bodyweight outdoor VKRs are completely vertical. An angled back plate removes the strain that a completely vertical back plate puts on the lower back. This is biomechanically correct, meaning it is safe on the user's body and helps prevent injury.
Back extension benches are another piece of bodyweight outdoor equipment typically biomechanically incorrect. In an indoor gym and real outdoor exercise equipment, a back extension bench has anywhere from 3-5 adjustable settings that make the length longer or shorter to accommodate various heights of users. This feature ensures that the end of the bench hits the waist in a spot that does not strain the user's glutes or lower back. Bodyweight equipment does not have this adjustable feature; therefore, a fixed length is used for people as short as 5'0 and as tall as 6'5.