Stage 4 prolapses do not happen overnight. It can take years to progress to such a late stage, so it really makes sense to work on maintaining a healthy pelvic floor.

Pelvic floor muscle retraining (PFMT) is the primary non-surgical (or so-called “conservative”) treatment for pelvic organ prolapse

References:

1. Basnet R. Impact of pelvic floor muscle training in pelvic organ prolapse. Int Urogynecol J. 2021 Jun;32(6):1351-1360. doi: 10.1007/s00192-020-04613-w. Epub 2021 Jan 8. PMID: 33416965.
2. Mattox TF, Lucente V, McIntyre P, Miklos JR, Tomezsko J. Abnormal spinal curvature and its relationship to pelvic organ prolapse. Am J Obstet Gynecol. 2000 Dec;183(6):1381-4; discussion 1384. doi: 10.1067/mob.2000.111489. PMID: 11120500.
3. Resende APM, Bernardes BT, Stüpp L, Oliveira E, Castro RA, Girão MJBC, Sartori MGF. Pelvic floor muscle training is better than hypopressive exercises in pelvic organ prolapse treatment: An assessor-blinded randomized controlled trial. Neurourol Urodyn. 2019 Jan;38(1):171-179. doi: 10.1002/nau.23819. Epub 2018 Oct 12. PMID: 30311680.
4. Kari Bø,^1,2 Sònia Anglès-Acedo,³ Achla Batra,⁴ Ingeborg H. Brækken,^5,6 Yi Ling Chan,⁷ Cristine Homsi Jorge,⁸ Jennifer Kruger,⁹ Manisha Yadav,¹⁰ and Chantale Dumoulin^11. Are hypopressive and other exercise programs effective for the treatment of pelvic organ prolapse? Int Urogynecol J. 2023; 34(1): 43–52. Published online 2022 Nov 23. doi: 10.1007/s00192-022-05407-y
5. Ting Wang ¹, Zhengfang Wen ², Meng Li ^. The effect of pelvic floor muscle training for women with pelvic organ prolapse: a meta-analysis. Int Urogynecol J 2022 Jul;33(7):1789-1801.doi: 10.1007/s00192-022-05139-z.