Hit it raw.. Tell me something is there any relationship between the muscle bellies length of a person to his recovery abilities? I noticed all top level athletes be it the NBA the NFL.. Swimmers.. The top guys are all unique in their muscle bellies length!! They all have very long biceps very long calfs and long lower backs to a degree that their torsos are straight like a board.. On the other hand we got those people with very short biceps very short calfs round lower back torso strucutres and we barely see them at the top levels they just dont make it to that level.
Your reasoning is wrong. The people you see in prof sports are top athletes therefore they have superior recovery and long muscle bellies or they wouldn't be top athletes. That doesn't mean that the two are linked. Just that if you happen to have both you're much more likely to be a top athlete.(and thus seen by you)
I also noticed that people with longer muscles shapes have more tendency towards slow twitch fiber types...
You noticed that how? by looking at endurance athletes? They almost always have long limbs and small muscles thus seem to have long muscles.
which means red muscles fiber.. which means more blood supply which means better recovery ability.
Thats a rather strange conclusion.
Recovery has much more to do with the ability of the metabolic system to remove damage tissue and build new tissue. Organs like the liver an kidneys pay a huge role in this. Off course good nutrition makes a big difference.
We should never forget that when we look at athletes on tv that those (wo)man are pure genetic freaks. They have the perfect bodily proportion for their particular sport. A weightlifter has short limbs long muscles bellies combined with a lot of fast twitch fibre. An endurance athlete has long limbs and a lot of slow twitch fiber. They must have these specific features or they wouldn't be able to compete against the rest of them genetic freaks called world class athletes. We of course cannot say anything in general about those factors by looking at the 0,0001% genetic freaks of the population.
Also all top athletes have superior neurological ability. they can activate many more fibres at once than regular folks can. Even an endurance top atlete with small muscles and long limbs, and thus has very bad weightlifting proportions, is a rather strong lifter compared to av joe because of this.