![]() ![]() With what we’ve seen in EMG activity, to build the “tear drop,” the direction in which we position our toes on the quad extension machine has similar activity regardless. ![]() ![]() The Bulk of the Quadīy pointing the toes out during leg extensions, you put the largest focus in activation on your rectus femoris, which is the bulk of your quad. The biggest areas of focus many aim to achieve in the quads are:īy pointing the toes in during leg extensions, you shift activation to the vastus lateralis, which focuses on building the outer part of your quad. When it comes to this movement, by adjusting the position of our feet, we can target different muscles within our quads to help shape them in the way we prefer. To avoid issues with our knees during leg extensions, its important to:Īvoid going “too heavy” - instead perform with higher rep ranges, for example, 12 reps and using moderate weightĪvoid using leg extensions as your main muscle-building movement - instead perform the bulk of your workout with movements such as squats and lungesĪvoid rushing through this workout - instead, make sure to keep reps controlled at a tempo of about 2-1-2-1 (2 seconds descending, 2 second pause at the bottom, 2 second contraction back to the top, and a 1 second pause before beginning the descend again)Īvoid pain - this is an obvious one, but sometimes it goes ignored regardless, instead, try re-positioning your toes or avoid this movement altogether if you’ve had issues with your knees in the pastīuilding Your Quads with Leg Extension Machines Just to reiterate, despite the hate that leg extensions receive, they are one of the best exercises for isolating our quads, which is what you want to hear if you’re looking to build and sculpt your quads. While there are some cases where there may be potential risks for injury, most people will not experience issues with this unless they have a history of knee injuries in the past. The second issue many have with the leg extension machines are that they’re bad for your knees. Instead of only using leg extensions, use them as a tool towards the end of your workouts once you’ve already completed your compound movement (such as a squat). ![]() This is because there is only a small opportunity for progressive overload (AKA a lack of ability to provide continual, increased stress on the body), which is necessary for muscle growth. For example, if you only do quad extensions, but aren’t utilizing movements such as squat or lunge variations in order to build your quads, its very unlikely you’ll see much progress. The flak you may hear comes into play due to people utilizing machines over compound (multi-joint) movements. As already stated, when it comes to EMG activity, its been shown to be some of the most beneficial movements to isolate the quads. Leg Extensions are Useless for Building Muscle? Some of the criticisms that may come up with these machines are that they suck for building muscle and they suck for your knees. While there are some criticisms to using these machines, leg extensions are one of the best at targeting and isolating our quads. ![]()
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