For triceps growth
For triceps growth, triceps extension machine rates higher on our research criteria: more of the work on the triceps.
Both are good choices, and they train the triceps differently. Using both across your week covers more of the muscle than either alone: in studies, varied exercises grew parts of a muscle that one exercise missed. (Fonseca et al., 2014; Costa et al., 2021)
The research score comes from these, scored by hand from the studies. Lifter scores appear once an exercise has 10 ratings. How scores work
Triceps Extension Machine. A fixed path isolates the triceps, and it’s easy to load and push close to failure.
Seated Dip Machine. Heavy triceps pressing on a stable machine, without the shoulder stress of bodyweight dips.
For triceps growth, triceps extension machine rates higher on our research criteria: more of the work on the triceps. Both are good choices, and they train the triceps differently. Using both across your week covers more of the muscle than either alone: in studies, varied exercises grew parts of a muscle that one exercise missed.
About the same: both are easy to learn.
Triceps extension machine needs a machine, so for most people it’s a gym exercise. Seated dip machine needs a machine, so for most people it’s a gym exercise.
About the same: both rate Excellent for joint and recovery cost in our research rubric.