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Challenge · 2025

#91: 100 Box Step-Overs (With Dumbbells or Kettlebells)

Build unilateral leg power, balance, and coordination with 100 box step-overs. A simple but effective conditioning and strength combo.

By Editorial Team · · Updated

Athlete performing box step-overs while holding dumbbells at the side, mid-stride over a plyo box

Box step-overs combine all the best elements of unilateral lower-body strength, coordination, and conditioning. More dynamic than step-ups and safer than box jumps, they offer functional carryover to everything from trail running to rugby.

In Challenge #91, you’ll complete 100 total step-overs, using a box, bench, or stable platform ideally with a pair of dumbbells or kettlebells for load.

This movement is a staple of functional training for good reason. It challenges your balance, tests your glutes, and builds serious work capacity.

“Step-overs demand coordination and control under fatigue two things that make athletes harder to break.” - RB100.Fitness

Challenge Format

  • Reps: 100 total (50 each direction)
  • Load: Dumbbells, kettlebells, or sandbag
  • Box Height: Standard 20-24” (adjust to athlete)
  • Movement Standard: Step laterally onto box, maintain tall posture
  • Step down under control on the opposite side
  • Alternate sides every rep or perform in blocks of 10-25 per side
Front angle of controlled descent off the far side of the box with soft knees
Front angle of controlled descent off the far side of the box with soft knees

Suggested Set Structures

  • 10 × 10 alternating
  • 5 sets of 20 with rest
  • EMOM: 10 reps per minute for 10 minutes
  • Ladder format: 5-10-15-20-25 with 30s rest

Log your sets, box height, and weights used in the RB100 Tracker.

Why It Works

Step-overs are an anti-fragile movement - they train you to shift weight, stabilise, and move laterally with control. Ideal for athletes, lifters, and anyone rebuilding after injury.

Muscles Worked:

  • Glutes
  • Quads
  • Calves
  • Core stabilisers
  • Hip abductors and adductors

Technique Tips

  • Use a soft step-down - don’t slam your foot
  • Keep core braced to avoid trunk rotation
  • Hold weights tight at your sides - don’t let them swing
  • Don’t rush the movement - control equals safety and stimulus

Scaling & Progressions

Beginner:

  • Bodyweight only
  • Lower box (12-16”)
  • Step-ups instead of over

Intermediate:

  • Add dumbbells or kettlebells
  • Alternate sides every rep

Advanced:

  • Increase load
  • Hold weights in front rack or overhead
  • Pair with a finisher like #66: Sled Pushes

Recovery & Integration

You’ll feel it most in:

  • Quads and glutes
  • Calves and ankles
  • Core (from carrying and bracing)

Cool down with calf stretches, hip mobility, and deep squats. Top it off with #28: Mobility Routine and hydration from #23: 100oz Water Daily.

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