DO HARD THINGS

The Combat Fitness Blog

Rucking for Tactical Athletes: The Complete Training Guide

Combat Fitness

Published on: 28/01/2026

Rucking burns 2-3x more calories than walking with a fraction of the joint impact. Complete tactical athlete guide: gear, weekly progression, and program integration.

Military Fitness

How Long to Build Aerobic Capacity? Full Timeline

Combat Fitness

Published on: 22/01/2026

How long does it take to build aerobic capacity? Expect first gains in 4–8 weeks, deeper adaptation by 16, and a true aerobic base in 6–12 months. Full breakdown.

Military Fitness