Sammy talks about his unique mental toughness book, INVINCIBLE: Mental Toughness for the Street, Battle Field and Playing Field. You don’t have to be David Goggins to develop true mental toughness. Mental strength can be developed by anyone!
INVINCIBLE book: https://amzn.to/2Z5amRK
Sammy’s Books: https://shorturl.at/kyS09
Website: http://ContemporaryFightingArts.com
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Video Contents
00:00 Intro
01:15 Cover Art
02:07 Chapter 1
03:02 Chapter 2
04:47 Chapter 3
06:02 Chapter 4
06:19 Chapter 5
06:55 Chapter 6
07:27 Chapter 7
08:02 Chapter 8
08:31 Appendix
09:15 Conclusion
