The Athlete of the Golden Age (The Tercios)

The Athlete of the Golden Age (The Tercios) The military elite that brought together the best of Europe — do you have their discipline?

Between the 16th and 17th centuries, Europe produced perhaps the most effective infantry force in history. Not one nation, not one flag. The Tercios brought together the finest soldiers from across the continent: Castilians and Aragonese, Neapolitans and Genoese, Flemings and Walloons, Germans and Burgundians, Swiss mercenaries. What united them wasn't where they were born, but a level of physical and mental demand that no other European force could match.

They operated across a territory stretching from Italy to the Low Countries, from the Mediterranean to the forests of northern Europe — the land that today makes up Spain, France, Belgium, Luxembourg, the Netherlands, Germany, Switzerland and Italy. Alessandro Farnese, considered by many the greatest general of the 16th century, was Italian raised in Spain. His soldiers came from across the continent. The language they shared in the field was Spanish, but the blood flowing through those formations was European.

For 150 years, no European army could face them in open field. Not because of numerical superiority or better weapons. Because of discipline. Because of physical preparation. Because of an endurance that transformed ordinary men into something resembling a collective war machine.

This is the story of how that body was forged. And a routine for you to try.

The three pillars of the Tercio soldier

The training of a Tercio soldier didn't exist in a manual or a notebook. It existed in daily life. In the physical demands that war imposed and that the soldier had to overcome week after week, year after year.

First pillar: the forced march

The Spanish Road was the supply route connecting Milan to Brussels: over a thousand kilometers on foot through the Alps, Burgundy and Lorraine. The Tercios covered it carrying between thirty and forty kilograms of equipment: armor, pike, sword, musket or arquebus, ammunition, rations and tools. A typical stage was thirty to forty kilometers a day. In adverse terrain. In adverse weather. With no option to stop.

There was no treadmill cardio. There was either arriving or not arriving.

Second pillar: isometric strength

The pike was the soul of the Tercios. A five-meter ash wood lance that could weigh between four and six kilograms. Holding it extended against a cavalry charge — for minutes, not seconds — required iron shoulders, permanently activated lats and a core that would not yield under any circumstance. The square formation, the famous tercio cuadrado, forced every soldier to hold his position no matter what came from the front.

In modern terms, we call it time under tension. They called it surviving.

Third pillar: functional strength

The sappers of the Tercios were improvised war engineers. They dug trenches before sleeping. They built palisades under fire. They moved cannon across impossible terrain. They scaled walls. All of that after days of marching. The body forged in those conditions wasn't a body for the mirror — it was a body for any situation life could present.

The routine: 5 days to forge that physique

The exercises that follow need no machines. No cables or pulleys required. They demand what the Tercio soldiers had: bodyweight, determination and the willingness to go to where it hurts.

Day 1 — Chest (The push)

In pike formation, the soldier pushed forward with the entire body. Chest, triceps and anterior deltoid were the engine of the advance. These exercises replicate that pattern.

Parallel bar dips — 2 or 3 sets of 8 to 12 reps Dumbbell flyes — 2 or 3 sets of 8 to 12 reps Archer push-ups — 2 or 3 sets to failure Ab wheel — to failure

Day 2 — Abs (The core)

Holding the pike. Withstanding the enemy's impact. Maintaining position in the square when cavalry charged at full speed. All of that depended on a core that wouldn't yield. This day exists because of that.

Front plank — 3 sets of 45 to 60 seconds Side plank — 3 sets of 30 seconds per side Lying leg raises — 3 sets of 12 to 15 reps Crunches with legs elevated — 3 sets of 15 to 20 reps Ab wheel — 3 sets to failure Mountain climbers — 3 sets of 30 seconds

Day 3 — Legs (The march)

The Spanish Road wasn't covered with your hands. The legs were the engine of the formation. The Bulgarian split squat replicates the asymmetric step of a loaded march; calf raises, the kilometers on hard terrain.

Bulgarian split squat with dumbbells — 2 or 3 sets of 10 to 15 reps per leg Squats — 2 or 3 sets of 10 to 15 reps Glute bridge — 2 or 3 sets of 10 to 15 reps The soldier (deep squat walk) — optional, to failure Calf raises — 2 or 3 sets of 10 to 15 reps

Day 4 — Back and shoulders (The pike)

Five meters of ash extended in front of you, for minutes, under the pressure of a cavalry charge. The lats and rear delts are what separated a standing pikeman from a fallen one. This day destroys them.

Bent-over lateral raises — 2 or 3 sets of 8 to 12 reps Lateral raises — 2 or 3 sets of 8 to 12 reps Wide-grip pull-ups — 2 or 3 sets of 8 to 12 reps Close-grip pull-ups — 2 or 3 sets of 8 to 12 reps Ab wheel — to failure

Day 5 — Rest (The camp)

The Tercio soldier didn't rest in hotels. But he understood something many modern athletes ignore: without recovery, the body breaks. This day is sacred.

Sleep well. Eat enough protein. Hydrate. Do mobility work if you feel like it, but nothing intense.

Day 6 or 7 — Arms (Close combat)

When the formation broke, the sword came into play. Hand-to-hand combat was explosive, brief and depended entirely on biceps, triceps and grip. The soldier who survived the close tercio was the one whose arms didn't fail at the decisive moment.

Concentration curl — 2 or 3 sets of 8 to 12 reps Hammer curl — 2 or 3 sets of 8 to 12 reps Close-grip pull-ups — 2 or 3 sets of 8 to 12 reps Overhead triceps extension — 2 or 3 sets of 8 to 12 reps Diamond push-ups — 2 or 3 sets of 8 to 12 reps Triceps kickback with band — 2 or 3 sets of 8 to 12 reps

How to progress

The Tercio soldier wasn't stronger than the enemy through genetics. He was stronger through accumulation. Week after week, year after year, the body adapted to the demands of service. You have three ways to do the same:

Add weight when you reach the top of the rep range with good technique. Add reps while maintaining the same weight. Add sets when the body no longer feels the effort as before.

Write it down. Without tracking there is no real progress.

To finish

The soldiers who formed the Tercios didn't choose that life for the physique. They chose it for something harder to define: a mix of necessity, pride and the certainty that belonging to the best infantry in the world demanded being something more than you were before you joined.

It didn't matter if you came from Naples, Ghent, Burgos, Metz or Zurich. If you formed in the Tercio, the standard was the same for everyone.

This routine won't make you a 16th-century soldier. But if you follow it honestly for twelve weeks, it will make you a stronger, more resilient and more functional version of yourself.

Do you have the discipline of those who crossed Europe on foot?

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