קשת בגב..

[KD2]

אז אתה יותר ממוזמן לפתוח את starting strength בעמודים - 34 עד 37
ולראות איך ריפ בעצמו כותב ב-ד-י-ו-ק מה שאני אמרתי.

however, as the squat approaches the bottom position, the necessary forward lean of the
trunk has a tendency to make the lower back assume a flexed, "rounded" position (fig. 2-36). This
"is due to the hamstring anatomy. As the squat depth increases and the torso assumes a more
forward tilt, the bottom of the pelvis (the origin point of the hamstrings), locked into the rigid
spine, tilts away from the back of the knee (the insertion point of the hamstrings). As these
muscles reach the limit of their ability to stretch, they become tighter and begin to exert more pull
on both the knee and their pelvic attachment. Merc is the source of the lower back problem: Your
back muscles attach at the top of your pelvis, and your hamstrings attach to the bottom. If your
hamstrings lack sufficient extensibility, they will exert enough tension on the bottom of your pelvis
to pull it out of its locked position in the lower back, breaking muscular tension in the erector
spinae, and permitting your entire lower back to come out of extension into a "round" position.
The back muscles and the hamstrings are competing for control of your pelvis, and the back
muscles must win if your spine is to stay safe.

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