Here is a progression we use for mobility, coordination, and strength for our athletes.
These type of squats are more aimed at range of motion in the ankle, knee, & hip as well as total body coordinative ability of rolling and utilizing momentum. Momentum in many ways can help OR hurt people depending on their level of coordination. We start slow with other progression and make sure they have foundational aspects of the bodyweight squat + hollow hold/hollow rock ability as we do this movements.
Over the past few years one thing is for sure, guys that are either injured (ankle, knee, hip) or those that lack mobility improve and feel much better and more athletic by utilizing these on a regular basis. They "can" be used as strength depending on people's abilities especially the single leg version.
I can see where some can think well for general population this wouldn't be safe, however, it depends on the type of client. Probably not an overweight client, but someone who has a decent foundation of fundamentals for sure could . I've never had any issues with these.
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