The term "CD3" in an Army context typically refers to "Conditioning Drill 3." It is one of the drills in the PRT, Physical Readiness Training
CD-77 Instructions - Stevens Instrument : Free Download, Borrow, and Streaming : Internet Archive
Civilian Development
Conditioning Drill 2 Exercise 3 - Half Jack
Kyle's Military Page - Conditioning Drill 3
Political notes: Ad wars in CD-3, Alsobrooks and Trone amp up endorsements - Maryland Matters
How Long Do CDs Last? It Depends, But Definitely Not Forever : All Tech Considered : NPR
Kyle's Military Page - Conditioning Drill 3
STARTING POSITIONS SQUAT POSITION PRONE POSITION SUPINE POSITION - ppt download
Pin by tom penny on daily PT/conditioning drills
preparation drill
CONDITIONING DRILL 3
Conditioning Drill 3