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Engine: Icy Interval Insanity

Day 4
45–60 min Frostbite Forge Day 4 of 5 Progressive overload

Mixed-modal cardio and bodyweight engine circuit to build cold-weather capacity and stamina—no heavy barbells needed but plenty of sweat!

Warm-Up

5 min easy bike or jog 2 rounds:

  • 10 jumping jacks
  • 12 lunges
  • 8 scap push-ups

Metcon

20 min EMOM, rotate through:

  • Minute 1: 10 burpees
  • Minute 2: 15/12 cal row or bike
  • Minute 3: 20 wall balls (20/14 lbs)
  • Minute 4: 30 double-unders or 60 single-unders Scaling: Reduce burpees to 6, wall ball to 10 lbs/squat jumps, singles only for jump rope

Cool-Down

  • Kneeling hip flexor stretch: 60 sec/side
  • Wall chest opener: 45 sec/side
  • Seated hamstring forward fold: 60 sec
  • Supine spinal twist: 45 sec/side
  • Standing calf stretch against wall: 30 sec/side

Core / Optional Finisher

Optional: 2x1min max mountain climbers, rest 30s

Coaching Notes

Engine day: intensity should feel frosty but not frozen solid—smooth, sustainable. Focus on rhythm over redline. Only advanced athletes should attempt all reps unbroken week 1.

Week-over-Week Progression

  • Week 1: 20min EMOM @ baseline reps
  • Week 2: 22min EMOM (add 1-2 reps per station)
  • Week 3: 20min EMOM (try unbroken, or increase wall ball to 25 reps)
  • Week 4: 18min EMOM (reduce reps or volume to recover)

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