A cable machine can be great for isolating various parts of the legs including the quads.
Seated leg extensions can make the legs burn as it takes a good deal of concentration to hold the leg steady throughout the movements.
For those of you who love free weights, be sure to throw in some cables or machines to mix it up. Variations in your training are a big bonus for growth and overall progress. Another variation that is a little less work to setup is to do this exercise standing. I will make a video of this version too.
This exercise can be a bit of a setup process because a bench is typically not an accessory to a cable machine also known as a functional trainer. Getting the bench into position and having ankle cuffs available are a bit of setup job. The same exercise standing also works and has less setup hassle.
The bad part of trying to hold the upper leg stead is that momentum can become an issue. Too much momentum of the upper body and upper leg can result is less isolation of the target muscle. However, when done correctly the burn and unique targeting can be fantastic.
Form & Safety
As always form and safety is extremely important. Injury is always possible. I have been doing movements like this for 26 years and adding weight is natural for me. Use caution and consult professionals. But keep in mind rule 2! Intensity is one of the rules I have lived by for over 26 years.
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I have kept lean and athletic for over 26 years by creating a demand for calories and eating sensibly. Working muscle, growing muscle and sustaining muscle all take calories! With a sensible diet, the extra calorie demand allows me to burn off calories that might otherwise be stored as fat.
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