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Delta Rep AFT Guide

Improve Your AFT Plank

The Plank (PLK) measures core endurance, trunk stability, breathing control, and the ability to maintain full-body tension under fatigue. While many soldiers underestimate the event, the plank becomes extremely difficult when core endurance and positioning break down.

The good news is that the plank is highly trainable. Most soldiers improve quickly by combining direct plank practice with stronger abdominal and trunk musculature.

Event

PLK

Plank

Video breakdowns

Improve AFT plank performance with ab rollouts, side planks, superman planks, weighted planks, and regular plank practice.

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What this event measures

The plank primarily tests:

  • Core endurance
  • Trunk stability
  • Shoulder endurance
  • Breathing control
  • Full-body tension
  • Fatigue resistance

Strong plank performance depends on maintaining efficient positioning while resisting fatigue in the abs, obliques, shoulders, glutes, and lower back.

How to improve

#1 Practice the actual plank

Specificity matters. Frequent plank holds help improve comfort, pacing, and mental tolerance during longer efforts.

#2 Build stronger abs

Direct abdominal work improves core endurance significantly. Exercises that transfer well include:

  • Ab wheel rollouts
  • Cable crunches
  • Hanging leg raises
  • Weighted planks
  • Hollow body holds

#3 Improve breathing

Many soldiers panic breathe once discomfort builds. Controlled breathing helps maintain tension and composure during long holds.

#4 Build total-body tension

A strong plank is not just abs. Squeezing the glutes, quads, and core together improves efficiency dramatically.

#5 Stay lean

Relative strength and endurance improve when excess body weight decreases.

Common mistakes

#1 Holding poor positioning

Sagging hips and poor posture waste energy and create unnecessary fatigue.

#2 Only training max holds

Constantly maxing out usually leads to poor recovery and limited training quality.

#3 Ignoring direct core strength

Core endurance improves faster when actual core strength improves too.

#4 Over-tensing the upper body

Many soldiers waste energy by excessively shrugging and tightening the shoulders.

#5 Panic breathing

Chaotic breathing accelerates fatigue and mental breakdown during long efforts.

Training example

Example plank-focused session:

  1. Plank Holds
    3 sets x 60-120 seconds
  2. Weighted Planks
    3 sets
  3. Ab Wheel Rollouts
    4 sets x 10 reps
  4. Hanging Leg Raises
    3 sets x 12 reps
  5. Hollow Body Holds
    3 rounds
  6. Easy conditioning finisher

This type of training improves:

  • core endurance
  • trunk stability
  • breathing control
  • fatigue resistance
  • full-body tension

FAQ

How do I improve my plank time fast?+
The fastest improvements usually come from frequent plank practice, direct core training, and learning to control breathing under fatigue.
How often should I train planks?+
Most soldiers improve well with 3-5 core-focused sessions per week using both endurance and strength-based abdominal work.
What muscles matter most for the plank?+
The abs, obliques, glutes, shoulders, and lower back all contribute heavily to strong plank performance.

Next step

Calculate your current AFT score, identify your weakest events, and build a structured military fitness plan designed specifically for improving Army Fitness Test performance.

Use the AFT Calculator to see where you currently stand, then use Delta Rep to follow military fitness programming built for real AFT improvement.

Other AFT event guides

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Maximum Deadlift

HRP

Hand-Release Push-Up

SDC

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2MR

2-Mile Run