22/10/2026
Two machines might look almost identical, train the same muscles and have the same weight stackโbut feel completely different.
Different angles, cams and leverages change how much resistance you feel and where the exercise feels hardest. That means 40kg on one machine wonโt necessarily feel like 40kg on another.
Cable ratios matter too. A machine with a 2:1 pulley ratio gives you roughly half the selected stack weight at the handle.
And this applies to plate-loaded machines as well. Different pivot points, lever arms and starting weights all affect how heavy those plates feel when you move them.
So when you try an unfamiliar machine, give yourself time to find the right weight. You donโt need to match the number you use elsewhere.
A useful guide is RPEโyour rating of perceived exertion. Put simply: how hard does the set feel on a scale of 1โ10? A 10 is your maximum effort, with no more good reps left.
If your workout calls for an 8/10 effort, choose a weight that gives you that level of challenge while keeping your movement controlled.
Once you know a particular machine, tracking its weights and reps is a great way to measure progress. Just remember that those numbers belong to that machine.
Learn the machine. Find the right effort. Build from there.
P.S. This is such a great seated leg curl.
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