Slow vs fast reps

retarded meme shit.
do eccentric controlled, and the concentric as explosively as you can while still having good form

Slower would be more hypertrophic due to the greater time under tension and would train you to have control of the weight. It would train muscular endurance. It would be more difficult.

Faster would train explosive strength and would be easier. However despite your actual muscle being less fatigued, your CNS may be more fatigued and you may feel more winded, especially for higher reps. The momentum and the stretch of your muscles coming out of the negative phase would be greater, making the reps easier. Imagine stretching an elastic and letting it go, a similar thing happens when you stretch and contract a muscle around your frame. Use of this tension is often called a "bounce" in the fitness community.

Let's say you're training to be a linebacker. You would do fast squats to train taking off like a sprinter. Once you hit the line and are pushing against the opposing linebacker, you are using the strength from slow squats. Since there is a lot of carry-over from both types of reps, they are often both trained.

You are also more prone to injury or bad habits with fast reps, and because most people will allow the weight to drop on the way down you are not training the negative portion of the lift as effectively as you could be.

You can think of each rep as a volume with time as one axis and the area covered per rep (from the moving joint to beginning position of exercise to the final position) on the other.
Increasing one increases volume. Rep area has a physical limit so there are a few things you can do for gains. Either multiply the volume by doing multiple reps or increase volume by doing longer reps
also, fuck off frogposter.

Depends on the exercise, some movements are supposed to be explosive and not slow, for things like chest and arms slower controlled reps will give you more time under tension and thus greater gains.

I like XQC but he is not alpha

You didn't see his anxiety beta attacks at twitchcon?

Food, and muscles would give him physical advantage over majority of the populus. Andaybe therapy for psychological problems? Its fixable. Good face, height, frame amd not to mention that money isn't a problem for him.

His workout stream he did recently was funny as fuck. He actually had good form on squats aswell.

Obviously he has potential, so do a lot of people. That's not really the point.

Trips of truth.

This, especially for compounds/intensity sets.

I believe you're thinking on "controlled, strict form, focusing on the eccentric part, fully stretching/contracting at each part" reps. If true, then yes, that's the best way to perform assistance/isolation/volume sets.
Keep rep tempo high and rest between sets as short as possible.

This seems to contradict some bodybuilding concept like, benching without touching the chest and no locking at the top, arguing that "time under tension is better".
I believe full ROM, full stretch and full contraction with minimal time to begin the next exercise phase is better for muscle damage while training the whole muscle, minimizing weak points and future injuries.