[Teaching Class] Stretching for bricks?

[Marfa]

I switched cities and now I'm training with a new team. I attend a recently opened BJJ class, so I'm the only blue belt present, the teacher being a purple belt.

Due to time constraints the purp belt arrives late, so I usually start the class and he takes over 10-15 minutes in. I'm free to do whatever I want in regards to how to start the class. Purp belt is also a wrestler and judo black belt, and has a more conditioning-oriented approach to warming up: a lot of movement based (jogging, sprints, shrimping, uchikomi with partners, tumbling) and not so much stretching.

Cliffs:
- My training partners have a brick's flexibility, and they won't work at it at home. If they try to go deeper than a halfsquat with the heel touching the floor, they fall.
- I have around 15 minutes to have people stretch properly.
- After my 15 minutes, class engages in moderate-to-intense exercises.

Questions:
- Will a good 15 minutes of stretching at the beginning of class have a noticeable (long term) impact on their flexibility and health?
- Can my 15 minutes of stretching hurt them once the conditioning starts?
- Are there any sources you can recommend so I can make/copy a good stretching routine for the class?

Some resources I'm looking at:
- Kelly Starret's Supple Leopard.
- Thomas Kurz's Stretching Scientifically.
- Kit Laughlin's Stretching and Flexibility.
- Youtube clips of dubious help.

Thanks for your time and effort in advance.

TL;DR: Halp me stretch my partners, plz.

PS: Here's a cute bunny with a pancake for non-related ilustration purposes.

Spoiler

 

[These Two Hands]

Kurz's book is excellent, if you really had to you could probably build a great flexibility program based simply on the information in the book.

Eddie Bravo has some good stuff on flexibility in most of his books, and probably available around the web. He's a bendy dude.

As far as I am aware, you want to spend that 15 minutes on dynamic stretching really.

 

[mattemate]

Best book I've read on stretching is Bob Cooley's "The Genius of Flexibility."

 

[biscuitsbrah]

A little bit of static stretching but movement flexibility should be key

 

[JustinTime]

Lol stretching for bricks. It's catchy, I like it. Check out Andrei Spina also. He's on YouTube and his stuff has helped me out. I'm a fan of Kelly Starrett's mwod stuff on YouTube also.

 

[Russky]

Thanks @rmongler

Be careful with stretching.

 

[rmongler]

Hip mobility is by far the most important mode of flexibility for athletic performance and the prevention of postural disorders in general. Dan John's book 'can you go?' often focuses on mobility and stability impairments.

Also this:

 

[SummerStriker]

Can you make them stretch after rolling? It would mean you would have to declare a last round and then make everyone stop and circle up.

It is by far the best time to hold long, static stretches.

When I was working on my hip mobility for squatting, my progression was:

Calf Stretch 40s
Quad Stretch 40s
Low Back Stretch 40s
Prying Squat 40s
Overhead Broom Stick Squat 15 reps

It worked pretty well. I can break parallel on front squats and arguably get there with the overhead. Before this routine, I would pitch forward and fail to break parallel on overhead squats. It took a long time though - months - to get there, so someone might have something better than this.

I'd do the above routine three times after a long warmup or other working out. The broomstick this is pretty technical so it is worth reading up on if you use it.