Light: below 60% of 1RM
Load, reps, safety
Sporvest is a reference on weighted vest training: how heavy the load should be and how to structure a session. A weighted vest adds load for body-weight exercises, walking, distance running and speed, agility and quickness drills; crewmen on a ship treadmill ran wearing 10 kg (20 lb) weighted vests. The National Strength and Conditioning Association sets load zones by percentage of one-repetition maximum — light loads below 60% of 1RM, medium loads of 8 to 12 repetitions at 60% to 80% of 1RM — and the wrong placement or a too-fast ramp-up introduces its own failures.
Light: below 60% of 1RM
Medium: 60% to 80% of 1RM
Hypertrophy: sets to failure
10 kg (20 lb) on a ship treadmill
Neck weights free the arms
Nylon and neoprene constrict
Pick a load zone by percentage of one-repetition maximum, then match the repetition band to your goal.
Load is expressed as a percentage of one-repetition maximum rather than as a fixed kilogram figure, because the same 10 kg vest is a light load for a strong athlete and a medium or heavy load for a beginner. The National Strength and Conditioning Association splits guidance into a light zone below 60% of 1RM and a medium zone from 60% to 80% of 1RM.
Within the medium zone, the association recommends 8 to 12 repetitions per set. That band is where most working sets sit for general strength work with a vest, whether the movement is a squat, a push-up or a loaded carry.
Hypertrophy is a separate target: it is maximised by taking sets to failure or close to failure, regardless of which percentage band the load falls in. Repetitions slower than 10 seconds markedly reduce that hypertrophy response, so grinding each rep for an extended count works against the goal.
An ordered ramp starts with body-weight repetitions, adds the vest, runs working sets, and stops on pain or breathing failure.
The ramp is fixed in order: choose a load zone from the table, perform the movement without the vest first, put the vest on, then run the working sets in the chosen repetition band. Stopping rules are explicit — pain in the working joints or an inability to complete a breath ends the set.
Failure modes appear when the order is skipped. Going too heavy too fast overloads joints before the movement pattern is warm; shearing in pull-ups happens when the vest shifts against the body under load; overheating follows from heavy nylon and neoprene that constrict breathing and trap heat.
A torso vest suits walking, running and drills; neck weights suit spinal flexion and extension; limb weights carry their own concerns.
A weight vest adds load for body-weight exercises, walking, distance running and speed, agility and quickness drills — the load stays on the torso, so the arms remain free for balance and arm drive.
Weights tied at the neck allow easier spinal flexion and extension because the arms stay free, which is a different movement goal from a loaded squat or carry.
Placement carries risks. Heavy nylon and neoprene vests can constrict breathing and cause overheating, and in movements like pull-ups a vest can shear against the body and damage the wearer or the vest itself.
Each card states a zone, its percentage band and the repetition guidance attached to it.
Three failure modes dominate: too heavy too fast, shearing in pull-ups, and overheating in nylon.
Too heavy too fast means jumping into the medium zone before the body-weight version of the movement is controlled; the joints absorb strain the pattern cannot yet distribute.
Shearing in pull-ups is a placement failure: the vest moves against the torso during the pull and can damage the wearer or the vest itself.
Overheating in nylon and neoprene is a material failure: the fabric constricts breathing and traps heat, which degrades every subsequent set.
| Load zone | Percentage of 1RM | Repetitions per set | Goal or note |
|---|---|---|---|
| Light | Below 60% | Higher reps, submaximal | NCSA light-load recommendation |
| Medium | 60% to 80% | 8 to 12 | NCSA medium-load recommendation |
| Hypertrophy | Any zone | To failure or close to failure | Maximises hypertrophy |
| Slow reps | Any zone | Repetitions slower than 10 s | Markedly reduces hypertrophy |
| Ship treadmill | 10 kg (20 lb) vest | Running | Crewmen ran with this load |
| Body-weight stage | 0% added | Full set before the vest | First step of the ramp |
| Stop rule | — | Any | Pain or breathing failure ends the set |
Load zones and repetition bands follow National Strength and Conditioning Association guidance; the ship-treadmill figure and placement risks are documented cases.