Jogging vs sprinting

Don't you think you should take all such speculation with a grain of salt?
Isn't it equally likely that if you are incredibly thin you have a serious advantage when distance running (more efficient) and that when you get to the world class level those little differences are a big deal -- the difference between qualifying for the Olympics or not. Same with sprinting. You need power, and big thighs, to be a challenger for the title of Fastest Man in the World.
The competitions may just select for those traits, rather than that training creates them.
There is a whole theory of human evolution that says that our survival advantage was that we could run far, and that we hunted by chasing our prey until it collapsed from exhaustion.

I agree with you, they were VERY rude. Some people can be pretty rude on this site, but the majority are not, THANK GOODNESS. As their points are valid, they did not need to belittle you.

Jogging or distance running for 40-60 miles a week does in fact cause the fast twitch muscle fibers in your body to decrease in size (and possibly even disappear from what I understand). That being said, that is a LOT of running to do. It depends on what you want to do with your body, if you want to develop explosiveness vs endurance, then sprints are the way to go (but only for about 20-30 minutes on workout days).

First of all...You don't need to attack me just to disprove me. I was simply inquiring what others knew of it, so I could include the one with the best benefits into my day. I looked at several sites not just Beast Fitness. But thank you for all your knowledge.

sorry, it was meant to poke fun at the name "beast fitness", not at you. My fault for not making that clear.

I jog daily, and my leg muscles are awesome. I wouldn't believe that website, you know whats even better than sprinting or jogging? a combination of them both, in intervals = amazing workout

THIS.

If I'm feeling pretty spry, I will do a few quarter mile speed runs and maybe a half mile speed run, with plenty of either walking or light jogging in between. I hit a legs-specific workout every five days and I have trouble fitting jeans, lol

Ask yourself first, do you want slow twitch muscle fibers or fast twitch muscle fibers. Then choose accordingly.

Isn't it equally likely that if you are incredibly thin you have a serious advantage when distance running (more efficient) and that when you get to the world class level those little differences are a big deal -- the difference between qualifying for the Olympics or not.

absolutely!
As a devote fan of distance running, I read all the books and follow the athlete's training plans. They are PURPOSEFULLY minimizing their muscle bulk because an excess pound or two of body weight, even if it's muscle, provided it's muscle that doesn't contribute to running speed, can mean win race / lose race. In his classic manuals on running, Lydiard described the look to aspire to as "plucked chicken" for the upper body.

Rule of thumb is you slow down by 2-3 seconds per mile per extra pound. For the everyday runner, who cares. I'm not going to win anyway, so I'd rather run my 5K 9 seconds slower but look great with the proportions of muscle that I prefer asthetically (plucked chicken not being my personal preference). For the Olympic athlete, 2-3 seconds per mile is a gold medal vs. no medal. This year's Olympics, there were 5 seconds between silver and gold for the women, 17 seconds between silver and bronze.

It's true that tons of aerobic-only work, paired with a big calorie deficit, can lead to muscle loss.
However, if you do some resistance training along with your running, you will be able to build muscle.

Jogging or distance running for 40-60 miles a week does in fact cause the fast twitch muscle fibers in your body to decrease in size (and possibly even disappear from what I understand). That being said, that is a LOT of running to do. It depends on what you want to do with your body, if you want to develop explosiveness vs endurance, then sprints are the way to go (but only for about 20-30 minutes on workout days).

Show me where this research is. My average mileage is within that range and my fast twitch fibers are still there, still defined and still doing their job. As a matter of fact, part of distance running is a weekly long run. One of the primary purposes of this long run is to recruit fast twitch fibers to do the job of the slow twitch fibers when they become fatigued. If you want more information, read Daniels Running Formula by Jack Daniels or look it up in Tim Noakes' The Lore of Running.

My answer is going to make me sound like a 16 yr old ding bat... Have you seen Pink lately? She looks amazing! She said she's done a varied program but swears that the most effective thing she's doing that tightens up her whole body is sprints. I'm a regular runner/jogger and I had already started incorporating sprints into my program but now I'm really upping my sprints! It does feel great to complete each sprint so I'm sure it has a great effect on your brain/mood/stress/all that jazz too