Paul

@RimaSukhadia @Tesla @Tesla_AI Is the person actually listening to enya in the car..

Golden boys are everywhere 🤩 Tesla CyberCabs are absolutely stealing the show in downtown Austin ✨🤩 @Tesla @Tesla_AI

@SpaceX Ser, they are upside down and the engines aren't finished.

Falcon Heavy in the hangar at Launch Complex 39A in Florida

@bennbuilds Not really.

Game changer

😂

so good

😂

Nice

@DeanTTraining My point was a very specific one. You said the muscle had the most leverage at the bottom of the rep. That's not true. That's it.

@Paul_MechEng Serious question: Are you familiar with the principle of neuromechanical matching? (Which is not bulletproof by the way but does appear to have quite a bit of merit)

A lot of people don’t know why the build of the VERTICAL Hammer Strength Chest Press Machines isn’t ideal for the Pecs So….allow me to explain it as simply as possible with a few photos: Red circle = axis of rotation Blue line = gravity Purple line = the machine’s arm that’s being moved through space The resistance is highest when the purple arm is most parallel to the ground because that’s when it’s most perpendicular to gravity creating the largest moment arm As the arm becomes more vertical, the moment arm shrinks and the movement gets easier The Pecs have best leverage to move the load in the bottom of the movement when stretched so you would ideally want it to be hardest there and then fall off toward the top where the Triceps have more leverage to move the weight through space Thus, the inherent build of these machines is legit the OPPOSITE of what you’d want for Pecs

You said "leverage" not force production. There is an interplay between how much force a muscle can produce based on its length and the amount of force it needs to produce to overcome the moment caused by the mass you're lifting. Even if the amount of force a muscle can produce increases as it stretches, it's a moot point if the amount of force required increases at a faster rate. Crazy if you think a press is easier at the bottom.

@Paul_MechEng Muscle force production is based on sarcomere length Every muscle group has its own length-tension relationship as a result Again, this is completely independent of the external physics at play

Yes, but there are to moment arms at play here. The machine moment arm and the skeletal moment arm. The mechanical advantage of the skeletal moment arm decreases the closer to the bottom of the rep you get. You can literally feel it when you press/squat. The squat literally has a name for it: "the hole"

@Paul_MechEng Again, the claim that pecs have their best leverage to produce force in the lengthened position is based on the length-tension relationship of the muscle group Strength curve ≠ resistance profile

Nope. It's simple mechanics, at the bottom of a press (and a squat) the muscle has to produce the most force because the moment arm caused by the humerus rotating about the shoulder is the greatest. Hence why you want the load created by the machine to reduce at the bottom of the rep.

@Paul_MechEng You’re confusing physics with length-tension relationship

Artemis Mission Route in 3D - This animation visualizes the Artemis mission trajectory in a dynamic 3D perspective, showing how the spacecraft travels through the Earth–Moon system while all celestial bodies are in motion. Instead of a static path, the Sun, Earth, and Moon move simultaneously, revealing the true complexity of orbital mechanics. The result highlights how the Artemis route is not a simple curve, but a constantly shifting trajectory shaped by gravity and motion. This view provides a clearer understanding of how modern space missions navigate through space in real time. Right now, Artemis is on its return path to Earth and is expected to arrive back soon as it completes its mission. The sizes and distances of the Sun, Earth, and Moon are not to scale and are adjusted for visual purposes.

May be a different muscle group, but I wouldn't say that has anything to do with it. You said that the pecs have the best leverage at the bottom of the rep, that's just wrong.. it's literally the opposite. The best leverage is at the top. At the bottom when pec is in full extension the lever arm of the humerus is it's greatest, meaning that the pec will have to produce more force in that position than at the top. That's why you don't see people half repping at the bottom, always at the top. Same mechanics for the squat, the further you descend, the greater force the muscle has to produce, hence why pendulum squats are good as they decrease the lever arm at the bottom. Again, you ain't seeing anyone half repping a squat at the bottom. Wonder why.

@Paul_MechEng The physics are the same The muscle group being trained isn’t Pendulums shine mostly because they create a very pain free squat experience as they’re very forgiving on the connective tissue

Oh my god it’s beautiful

The coolest orbital animation I've seen of Artemis 2 Just really shows you how far away they're flying today and also how precise they need to be to go to the moon

@DeanTTraining Joke's on you... I don't go to the gym

Something I noticed recently: All of the most jacked dudes in the gym and on social media are perfectly willing to move a bench over to the cable area to make their exercises way more effective Basement dwellers on X with no profile pic are totally UNWILLING Lesson in there…

@aus877 @zachary135791 Also has been shown to boost test by precisely 137.2%

@zachary135791 It has been clinically proven that making this face while doing it increases effectiveness by 75%

So underrated Strong adductors - make your legs look wider / more aesthetic - improve pressing / squatting power - reduce risk of groin injuries

@alexaldente WHITE.WINE.VINEGAR

The egg I’m poaching: