>>1362650Cartwheels aren't particularly hard or physically demanding, any fatso can learn to do them fully extended in 5 minutes. Holos not doing any fast or fancy maneuvers is more likely to be a tech issue, their tracking's not keeping up and the gear the actors have to wear is either throwing their balance off, or is too fragile to risk it. Think back to Coco's ponderings after her 3D debut and how many times the staff had to forbid her from pulling any of the riskier moves she wanted to try.
>out of breath 5 minutes into the concertThese stage performances are all prerecorded, they don't really have to be present and "on stage" themselves. They can record numbers in segments and take plenty of breaks in between.