Sandbag Shouldering develops posterior-chain power, grip, and trunk stability against an unstable implement. Straddle the bag, hinge with a flat back, scoop and lap it, then explosively extend hips to pull the bag to one shoulder; stabilise and stand tall. Alternate sides. The shifting load builds resilience and transfers to carries, cleans, and tackles. Errors: curling with arms, rounded low back, dumping the bag. Cue “hips through,” “hug tight,” “tall finish.” Use 4×6–8/side for strength or 50–100 total reps for brutal conditioning.