Iron Forge

Proven program, faithfully implemented

5BX

GeneralConditioningBeginnerIntermediate

Eleven minutes, no equipment, six charts you climb one level at a time.

About the program

Created by: Royal Canadian Air Force (Bill Orban) — RCAF pamphlet 30/1, 5BX Plan for Physical Fitness, 3rd edition, 1965 — public domain.

Who it's for

How it's built

The shape of the program — sessions, sets and rep scheme. Every set here is bodyweight — Iron Forge tracks the level you are on and moves you up when you have earned it.

5BX · 8 weeks

5BX — Five Basic Exercises

  • Toe Touch with Backward Bend — 1×2
  • Sit-Up to See Heels — 1×3
  • Alternating Single Leg Raise (Prone) — 1×4
  • + 2 more exercises

5BX — Five Basic Exercises

  • Toe Touch with Backward Bend — 1×2
  • Sit-Up to See Heels — 1×3
  • Alternating Single Leg Raise (Prone) — 1×4
  • + 2 more exercises

5BX — Five Basic Exercises

  • Toe Touch with Backward Bend — 1×2
  • Sit-Up to See Heels — 1×3
  • Alternating Single Leg Raise (Prone) — 1×4
  • + 2 more exercises

5BX — Five Basic Exercises

  • Toe Touch with Backward Bend — 1×2
  • Sit-Up to See Heels — 1×3
  • Alternating Single Leg Raise (Prone) — 1×4
  • + 2 more exercises

5BX — Five Basic Exercises

  • Toe Touch with Backward Bend — 1×2
  • Sit-Up to See Heels — 1×3
  • Alternating Single Leg Raise (Prone) — 1×4
  • + 2 more exercises

5BX — Five Basic Exercises

  • Toe Touch with Backward Bend — 1×2
  • Sit-Up to See Heels — 1×3
  • Alternating Single Leg Raise (Prone) — 1×4
  • + 2 more exercises

5BX — Five Basic Exercises

  • Toe Touch with Backward Bend — 1×2
  • Sit-Up to See Heels — 1×3
  • Alternating Single Leg Raise (Prone) — 1×4
  • + 2 more exercises

How Iron Forge runs it

How it works

Six charts of twelve levels, D- to A+. Five exercises in a fixed order, one set each, inside per-exercise time boxes of 2/1/1/1 and 6 minutes — eleven minutes in total.

Start at Chart 1, level D-. Move up a level when you can complete the required count for every exercise inside the eleven minutes, and only after you have spent the minimum number of days at that level — four at 30-39, seven at 40-49, eight at 50-59, ten at 60 and over.

⚠ The five exercises change on every chart. They are not the same five getting harder: the push-up leaves the knees at Chart 2, and the sit-up gains a twist at Chart 5.

5BX in Iron Forge

A 5BX workout in Iron Forge
Today's 5BX session
Iron Forge rest timer and plate calculator during 5BX
Rest timer

FAQ

How long does a session take?

Eleven minutes. Two minutes on the first exercise and one each on the next three, then six minutes on the stationary run. The time box is the point: you do as many as you can inside it.

Where do I start?

Chart 1, level D-, whatever your training age. The charts are ordered and the first one is deliberately gentle.

When do I move up a level?

When you can complete the required count for every exercise at your present level inside the eleven minutes. The source also asks you to spend a minimum number of days at each level, and that minimum rises with age — four days at 30-39, seven at 40-49, eight at 50-59, ten at 60 and over.

Why did the exercises change?

Every chart has its own five. The movement gets harder as you climb, not just the count — the push-up leaves the knees at Chart 2, and the sit-up gains a twist at Chart 5.

Start 5BX for free today.

Real programs, done right. Log your lifts — Iron Forge handles the maths.