When I do spotting in motion, I'll either do a silly little kneeling shuffle or I'll take slow, careful steps towards the spotting location. I worry that gymnasts alter their tumbling if they see their coach jumping around to get into position - I would if I was tumbling!
I have a question (
@Geoffrey Taucer ?)- does anybody have tips or thoughts for spotting on trampoline? I've never done a "bouncing-with-the-gymnast" spot. I started by just bouncing with them while holding their mid-section until our rhythm was good, then had them do 3 bounces together to a back-drop position in the air (I'm holding them in midair), and we've done a few back tucks with this spot which were safe, but felt a bit messy. I basically just rotated them from their mid-section, switched my hands, then caught their mid-section again to stabilize the landing.
They don't really need the spot - but I'm thinking way down the line I might want to have this option when it comes to spotting double backs. Thoughts? We just put in a legit, full-sized trampoline
I start like you, bouncing along side them while holding the mid section to keep us synchronized. With a bit of practice, you can have pretty decent control over their height by hitting the trampoline slightly after them to decrease their bounce, or slightly before to boost it (ie "double bounce"). I usually do the three-count and slightly boost their bounce on 3 as I bump their takeoff; this ensures I'll land before them, giving me the most stable position to spot the landing from, and I try to kill their bounce on landing as well.
That said, I prefer not to spot double backs on the trampoline if I can avoid it; seems to me there's just too much that can go wrong, both for me and for the athlete. Ideally, the only skills I'd want spot on a trampoline these days (if back problems weren't currently preventing me from spotting at all) would be some early back drop cleanup, set-to-tabletop for back salto prep, and early back tucks and layouts; anything past that, I'd rather develop without spotting if possible.
I prefer to have them learn double backs in a spotting belt and/or into the pit (usually with a block/mini tramp set up, so they can handstand, snapdown, double back) until we're both confident they know where they're at in the air and ready for the landing. Heavy focus on visual cues; they need to see the landing after the first flip and see it again after the second flip. On snapdwon double backs on mini tramp, I might give them a bump on takeoff if necessary. When they can consistently open at the correct time to land, and when they feel confident to try it, we throw a mat into the pit to land on (something thin and flimsy like a sting mat or a beat-up 4-incher is fine; it's less about actually standing up a landing than it is about being confident and consistent enough to prepare for the landing). Once that's good, we take it over to the trampoline and I slide a mat in under them.
This year I spent some time teaching my upper-level athletes to slide a mat for each other, and that's made things much easier. Outsourcing the mat slide to the athletes has allowed me to step back and properly watch the skill, which is a nice luxury to have. It also, somewhat counterintuitively, seems to help their confidence on the skill, as it leads them to develop it without ever feeling like they need a coach standing there to feel safe.
That said, all this relies on a pretty good setup (we have a pit, a resi, and a trampoline with a spotting belt over it), which not all gyms have. Between trampoline, spotting belt over trampoline, and pit, I think I'd insist on having access to a trampoline and at least one of the other two in order to train double backs -- to me it doesn't seem worth the risk otherwise.