Weighted bags for cross-training

Why moving a load changes the effort

A weighted bag, or sandbag, contains sand or loose pellets. With each repetition, the mass shifts and deforms: the body must catch up with it, which constantly activates the stabilising muscles, the abdominal belt, and hand strength. Unlike a barbell, the bag has no fixed trajectory, and its soft shape requires you to hold it close to your body. This work mimics the efforts of physical jobs and everyday tasks, like carrying a heavy and cumbersome object, which is why it's used in strength training and cross-training events.

The rest of the training

Strength training also includes:

• Skipping ropes.
• Waves ropes.
• Speed ladders.
• Suspension straps.

Everything is gathered on the strength training page.

Bear hug, clean, throw: the basic movements with a sandbag

The bear hug, with the bag held against the chest, is performed while squatting or walking and strengthens core stability. The clean involves lifting the bag from the floor to the shoulders through an explosive hip extension; when combined with a squat, it becomes a full-body exercise. Carrying it on the shoulder, alternating sides, works on trunk stability under an asymmetric load. The throws over the shoulder, typical in strength competitions, develop hip power. The side handles are used for bent over rows and swings.

Load, cover and filling bags

Most sandbags have internal filling bags, secured with Velcro or a zip, which you add or remove to adjust the load. The cover made of Cordura or thick nylon, with reinforced seams, withstands throws and abrasion on the floor. The sand needs to be dry and placed in double bags; otherwise, it will leak into fine dust with each impact. A bag that is half-filled is more unstable, thus harder, than a bag that's full: varying the filling thus becomes a lever for progression, just like the load.

Good deals

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Frequently asked questions

What weight of sandbag should I choose to start?

You should start with a moderate load, suited to your size, to learn the movements safely: the instability makes each kilo more demanding than with a barbell. You can then increase in small increments using the filling bags.

Sand or pellets: which filling should I choose?

Sand, being dense, provides a lot of weight for a small volume but produces dust if it leaks. Rubber pellets, lighter and cleaner, require more volume for the same load and are better suited for indoor use.

Can you train with a sandbag at home?

Yes, that's one of its advantages: a weighted bag can be stored in a corner and doesn't need a rack or plates. You just need a protected floor for throws and enough ceiling height for overhead movements.

Is the weighted bag suitable for back strengthening?

When used properly, it strengthens back muscles and core stability through lifts and carrying. You should keep your back neutral, pushing with your legs, and lighten the load as soon as your spine rounds.

How many sandbag sessions per week?

Two to three weekly sessions are sufficient, spaced with a rest day. The sandbag can also be incorporated at the end of a session, in the form of carrying or a short sequence, to work on core stability without overloading the joints.