HORIZON CORE | Week 10: Posture Under Fatigue

Amy Petersen headshot
Amy Petersen
ACE-CPT, Sports Performance, PN-1, PATHFINDER Founder & Director of Programming
October 31, 2025

You’re not here to crush it this week -- you’re here to just clean it up.

This final peak core session is about holding position under fatigue without piling on extra soreness. Every rep reinforces clean posture, smooth mechanics, and the ability to stay upright when your energy’s spent.

We're done with overloaded training. You're putting the finishing touches on posture that won’t fold, even when you’re tired.

NOTES

  • RPE (rate of perceived exertion) should be 6-7.
  • If needed, adjust the number of reps, time, or rounds to fit your fitness level.
  • If needed, rest 1-2 minutes between rounds.
  • Always do your warm-up to help prevent injuries.
  • Some video demonstrations may depict exercise tools other than a ruck - the same cues and form will still apply unless otherwise noted.

REMINDER:

  • Soft count: 1, 2, 3, 4 ... this is when both (or all) limbs perform the exercise at the same time.
  • Hard count: 1,1, 2, 2, 3, 3, 4, 4...this is when only one limb does work at a time.
  • Each Side: Do all reps on one side before switching to complete all reps on the other side.

WARM UP

 REPS EXERCISE COUNT
8 x Wall Slides
10 x Heel and Toe Inline Walks EACH

WORKOUT x 3 ROUNDS

 REPS EXERCISE COUNT
8-10 x Ruck Squats (3 sec down, 1 sec pause, stand)
:30-:45 sec x Side Plank EACH SIDE
8-10 x Dead Bug with KB Press-Out
:20 sec x Prone Y Hold