Massi!
Yes it can be a tough bridge to gap, as mobility starts to play a stronger role/restriction here.
Firstly, the balance aspect is certainly more present the more you progress. So take that into the practice. The body-structure starts to take on an interesting combination of being both somewhat over-stretched (i.e. holding the foot), and yet also really compressed (i.e. hinging forward) This both shifts & elevates the tension in your body so it can be more difficult to balance compared to being more relaxed, and also gives you less-space to negotiate balance.
Notice how your center of mass SHIFTS when you take the foot. Where & the direction in which you apply force through the floor changes. You'll need to adapt as it won't be the same as when not holding the foot. COUNTERBALANCE with the upper-body. If you're slightly restricted in dorsiflexion, you'll notice that you'll need to shift the weight into the BALL of the foot. This then challenges the strength & integrity of the knee more. The glutes almost get eliminated from the equation, playing only a stabilising role. It gets "heavier".
Proposals to help:
- If you've restrictions in dorsiflexion (e.g. resting squat not sustainable/comfy), then add this work into your prep for that session, or even just before.
- In the same section, put the 'Long-lunge to knee-drop & foot-hold' & work toward achieving heel-to-ass in the foot-hold. Go for just 1 set of 20-30" ea. variation: Long-lunge / Knee-drop / with foot-hold ea. side. You can do this near daily - the same with the dorsiflexion - to help things along: https://www.movemorevrl.com/videos/quadriceps-hip-flexor-stretching
- Build capacity of the LV2 shrimp up to a decent level. A minimum of 10x, but 15-20x would be better.
- If you've trouble counter-balancing forward due to difficulty compressing to tightly, consider adding a compression routine such as the pike one here. At the end of a session, 2-3 sets in a around with some other quad-stretching context. Paired with 'Low-bridge slide' would be a great buddy.
https://www.movemorevrl.com/videos/v-sit-pike-compression
Do keep us updated with your journey and feel free to upload a video from Youtube or so in the 'Share my practice' board - let's turn that Shrimp into a lobster!
With energy & fire for the open road ahead
J