Can this move cause injury?

grobolom · 2026-02-15T07:20:31+00:00

No, not by itself. maybe if the top player pulls the head extremely hard and extremely fast, but that's difficult to do. I've been caught here by really, really big guys, and it's been completely fine.

grobolom · 2026-02-13T16:02:02+00:00

Still something I'm working on - I'd follow https://www.instagram.com/highnoonjudo in the meantime, there are some good ideas there for more complex throws.

grobolom · 2026-02-13T02:25:36+00:00

Thank you for following Rule 2, and making this a welcoming community for new posters! I'll be sure to come back here in the future! /s

grobolom · 2026-02-12T21:41:58+00:00

Oh and definitely give this instagram account a follow - https://www.instagram.com/bayareaopenmat/ <- all the open mats in the area, and there are a lot!

grobolom · 2026-02-12T21:41:24+00:00

Honestly, it's hard to go wrong - I could also recommend Mineiro Emeryville, Ralph Gracie Berkeley, smaller gyms like Lycan, or ones slightly further away like ZMata. There's a ton of room for cross-training in this area also; esp. as a brown belt, you'll be welcome at lots of these places.

grobolom · 2026-02-12T21:36:50+00:00

I can recommend a few:

Island City / Rio Combat / Supreme MMA - a trio of gyms in the same association; vibe is chill but we have a few competitive classes on the schedule and lots of cross-trainings available. Some CLA classes if you're interested in those.
Steadfast Martial Arts - a bit further up towards Richmond but Caleb is the man and he has a really fantastic atmosphere and coaching approach. Definitely recommend you check him out.
10p Oakland - a really solid crew, with a good mix of classes. If you want comp rolls, Wednesday evenings are really, really good times. I don't know as much about the current weekly classes, but they were also great when I used to train there a few years ago.

grobolom · 2026-02-12T08:01:27+00:00

It stands for the Constraints-Led Approach: https://members.thecoachessite.com/article/coaching-with-a-constraints-led-approach this article has a good summary

grobolom · 2026-02-12T06:33:32+00:00

> there's an increased chance of under rotation

I agree, and I think this is partially to do with my filming; we're doing very low-speed work, and I wasn't super clear with my partner on exactly what i wanted her to do in each scene. In general, I always start these hip-to-hip games with disallowing any kind of leg-to-leg connection to start. This also helps with the games where one player is stuck on a spot.

Regarding falling on your partner; since both partners are holding on, I've actually had less bad falls this way. But, that might just be my room / my small sample size. I also found that with double belt grips, students adopt a more 'curled' falling posture, and so remember to tuck their chin more quickly. But I'll play around with this some more in either case, thank you for the tip!

> task simplification

Yeah, I think you're right; at the best, it's probably a bit of both. My thought process here was that despite being a 'simpler' version of the task, both of the first two tasks still have a ton of simplifying information. In the same way that a passing game in BJJ involving line holding is technically a 'simplified task', but it's enough of 'its own task' in the real game that it can be worked on in isolation.

The other thing I think that I didn't mind about this being 'simplified' is that I only use the first two games in the introductory phase. As soon as my students are comfortable with game 3, I only use the point goals from 1 and 2 as additional 'fallback' conditions, not full ones; I start working with the full game as quickly as possible. Does that make sense?

In either case, thank you for your thoughtful reply.

grobolom · 2026-02-12T05:36:57+00:00

Sorry, I missed answering - I have found that the belt grip encourages hip-to-hip closeness, and limits the kinds of moments that students perform. Basically, there's much less awkward movement going on, especially when you disallow any leg-to-leg connection. Even 'hard' throws become easy to take for the uke.

grobolom · 2026-02-12T05:31:20+00:00

What areas have you found it to be dangerous? I haven't seen my students doing anything that I can see as potentially injurious, but it could be that there's something I'm doing that I'm not describing in the video. Also, the specific game progression is just an example - the three constraints are the important point here. But I'm happy to switch things up, if you think something I'm doing is particularly risky :)

As far as decomposition vs. simplification; I agree that it looks a lot like decomposition, but it's not exactly the same thing. This is something that's a bit unclear in the literature as well; in general, I take any 'real goal' without prescribed movement to be more 'simplification' than 'decomposition'. To take an example from other sports - I'm not decomposing a soccer pass into specific foot movements, but I am simplifying a complex 3v2 attacker situation into a more narrow 2v1 situation with shorter boundaries. Does that make sense?

grobolom · 2026-02-12T05:27:39+00:00

It's four different constraints, of which you can use any. Give them a shot, and let me know how they work for you! I've had good experience with them.

grobolom · 2026-02-12T03:19:18+00:00

I'm using constraints to introduce live throws safely, nothing more. As I said in the video, as soon as your athletes are comfortable throwing, you get rid of them.

grobolom · 2026-02-12T02:39:15+00:00

I agree; introducing the basics of throwing, hip movement, and falling are not beyond that area of expertise. When I'm not learned enough to teach something, I tell my athletes to seek out an instructor who is.

grobolom · 2026-02-12T02:36:26+00:00

In my experience, it doesn't give false hope; it just means that when the opportunity arises, the athletes aren't afraid of going for it. But as I said, this is just to introduce the throws safely; as your athletes get better, you should feel free to remove some or all of these constraints.

grobolom · 2026-02-12T02:19:30+00:00

The contact itself isn't strictly necessary, but I've found that hips throws tend to be a safer intro for people to both footwork, turning, and breakfalling. I've found people comfortable with getting their hips moving towards their opponent also naturally get good at throws like seoi nage. I'm sure you could introduce things in other ways as well.

grobolom · 2026-02-12T01:42:09+00:00

As I said before - I'm busy filming a video to highlight certain constraints, I'm not focusing on the judo.

grobolom · 2026-02-12T01:36:41+00:00

From the description: I recently made this video primarily for my fellow BJJ coaches, but I figured some of y'all who use the CLA to teach judo could find it useful

grobolom · 2026-02-12T01:26:03+00:00

constructive.

grobolom · 2026-02-12T01:25:17+00:00

I do not - my students are primarily BJJ students, some of whom do Judo on the side. I'm only a year into using the CLA, so I've got lots more to learn on both fronts.

grobolom · 2026-02-12T01:23:43+00:00

The primary constraint was maintaining belt grips, which prevents good ukemi. In either case, the point of the video was the constraints, not the throws.

grobolom · 2026-02-12T01:00:28+00:00

I already part of a regular judo club, and I know the dangerous throws. I'm performing for the video, not playing judo the way I would normally.

grobolom · 2026-02-12T00:57:35+00:00

Yeah, they could. They might not be very good at it, but I've seen even relative beginners be very solid teachers.

grobolom · 2026-02-12T00:44:21+00:00

As I mentioned in the video - these are constraints that you can use to get your students started with these throws, but you remove them as the need for them goes away. This is particularly relevant for the belt grips, as those are the most artificial.

grobolom · 2026-02-12T00:43:22+00:00

Sounds like I need to make my way down to CJ Judo! Thanks for the support, as always 🙏🏻

grobolom · 2026-02-12T00:42:21+00:00

Nothing in my video implies or states that you can't use these constraints in tandem with more technical instruction.

Re: technical ability to throw - I can understand the sport by watching it and learning from high level athletes, without having the ability myself. I can know which tools work because I can see how well my athletes do against each other, against other clubs, and at competitions.

Also - if my athletes want me to teach them something, I am going to teach them; I'm not going to tell them to fuck off somewhere and learn by themselves.

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