DO HARD THINGS

The Combat Fitness Blog

Aerobic Capacity for Military Selection: Build the Engine

Combat Fitness

Published on: 26/01/2026

Aerobic capacity for military selection decides who lasts to the final cut. Learn how to build the aerobic base, train it under load, and avoid burnout.

Military Fitness

Training Density Explained: Work-to-Rest for Tactical Athletes

Combat Fitness

Published on: 22/01/2026

Training density explained — how work-to-rest ratios build work capacity, fatigue resistance, and operational readiness for serious tactical athletes.

Military Fitness

Capacity vs Capability: What's the Real Difference?

Combat Fitness

Published on: 22/01/2026

Capacity is what you can do once; capability is what you can do repeatedly, under fatigue. Learn the difference and how to train for tactical performance.

Military Fitness