Those Who Can, Do.

The Breakdown: Defying Death at the Gym

Neat little gymnastics demonstration that you will never catch me attempting, because it looks like an engraved invitation to a serious injury. The physics is much less strenuous, being an exercise in conservation of linear and angular momentum. If you read through the comments you’ll find someone who insists the explanation is wrong, because kinetic energy isn’t conserved in inelastic collisions. But kinetic energy isn’t mentioned in the explanation, so file that under “W” for “WTF?” The same poster returns to dig his hole even deeper by insisting that momentum isn’t conserved, either. It’s scary if they are indeed a teacher of statics and dynamics.

The Truth Hurts

The Onion: Roster-Depleted Bears Sign Tire Swing For Cutler To Throw To

Analysts say that, while the move is somewhat unorthodox, Chicago was prudent in passing on veteran free agents Amani Toomer and Joe Jurevicius in favor of offering the tire swing a 3-year, $2.4 million contract.

I have Cutler on my Fantasy team, and he led me to our league’s Super Bowl (which I ended up losing in a stunning week-17 scoring collapse, while my opponent exploded for 97 points to overcome my 26-point lead from week 16 and win by 31). The trade to the Bears was a definite downgrade for me.

Crossing Over

The Crossover Flywheel hockey training aid

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The one redeeming facet about when “I am the story” reporters try to participate in their pieces is that there’s the potential that they can get hurt.

Making Sense of Some Mind-Boggling Stats

Stray Thoughts on 1962

Questions about the connection between gaudy stats and helping your team to win aside, a look at a comparison between the insane stats posted in 1962 and what’s going on today, in terms of the pacing of the game, then vs now.

Okay, so you’ve all seen Wilt and Oscar’s numbers from 1962… but have you ever sat down and looked at the league averages that year? In ‘62, the average team took 107.7 shots per game. By comparison, this year the average team takes 80.2 FGA/G. If we use a regression to estimate turnovers & offensive rebounds, the league pace factor for 1962 was 125.5 possessions/48 minutes, whereas this year it’s 91.7. Oscar’s Royals averaged 124.7 poss/48, while Wilt’s Warriors put up a staggering 129.7 (the highest mark in the league). On the other hand, the 2009 Cavs are averaging a mere 89.2 poss/48. It turns out that the simplest explanation for the crazy statistical feats of 1961-62 (and the early sixties in general) is just that the league was playing at a much faster tempo in those days, with more possessions affording players more opportunities to amass gaudy counting statistics.

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It's Pure … Something

Tiger Woods’ game after surgery may be pure physics

Woods’ swing has been the envy of golfers around the world ever since he burst onto the professional scene in 1996.

His action is pure efficiency, combining hip, shoulder and wrist motion to exert the greatest possible force on the ball.

Pure efficiency? Does that make him the Carnot of golf. Perhaps we should refer to the swing as the “Woods cycle.”

The applied physics of his swing propels the club head at an estimated 125 mph at the point of impact with the ball but it also concentrates intense and repeated kinetic energy on his left knee.

Ooh, concentrated intense and repeated kinetic energy? That made me wince, but not from ligament damage.

Much of the rest of the article is about biology and medicine. I don’t know how badly mangled that is.

Quest for Statistics

Statistics, and the quest for meaningful statistics, in basketball. Baseball may have the most dubious statistics, but because of the dynamic of the game, in basketball you can amass impressive personal statistics in a way that hurts the team, e.g. the box score shows you scored 20, but that doesn’t indicate if it was on 10-of-20 shooting or 10-of-30, and doesn’t say whether a missed shot was at the expense of a teammate who had a much better opportunity.

The No-Stats All-Star

[T]he big challenge on any basketball court is to measure the right things. The five players on any basketball team are far more than the sum of their parts; the Rockets devote a lot of energy to untangling subtle interactions among the team’s elements. To get at this they need something that basketball hasn’t historically supplied: meaningful statistics. For most of its history basketball has measured not so much what is important as what is easy to measure — points, rebounds, assists, steals, blocked shots — and these measurements have warped perceptions of the game. (“Someone created the box score,” Morey says, “and he should be shot.”) How many points a player scores, for example, is no true indication of how much he has helped his team. Another example: if you want to know a player’s value as a rebounder, you need to know not whether he got a rebound but the likelihood of the team getting the rebound when a missed shot enters that player’s zone.

There is a tension, peculiar to basketball, between the interests of the team and the interests of the individual. The game continually tempts the people who play it to do things that are not in the interest of the group. On the baseball field, it would be hard for a player to sacrifice his team’s interest for his own. Baseball is an individual sport masquerading as a team one: by doing what’s best for himself, the player nearly always also does what is best for his team. “There is no way to selfishly get across home plate,” as Morey puts it. “If instead of there being a lineup, I could muscle my way to the plate and hit every single time and damage the efficiency of the team — that would be the analogy. Manny Ramirez can’t take at-bats away from David Ortiz. We had a point guard in Boston who refused to pass the ball to a certain guy.” In football the coach has so much control over who gets the ball that selfishness winds up being self-defeating.

A Little Morality Play

Imagine you are a teacher, giving tests over the course of several years. Even though you mention other behavior that is forbidden, for a long time you never tell your students that copying from a crib sheet, or another student, is wrong. It’s never listed as being against the rules. You leave the room when giving an exam, and you grade on a curve. What do you suppose will happen? If a C student does better, and in doing so starts outperforming others, forcing their grades down, will all of them chose integrity over better grades? Of course not.

You ask the students if they cheated. What answer will you get?

Phelps gets suspended, A-Rod gets … nothing

Yeah, Michael Phelps got suspended. Why? Because if he smoked pot, he broke the rules. Baseball, on the other hand, had no punishment for steroid use for the time in question. Steroids, specifically, were not “banned” until 2002, and that’s not even right, because there was no punishment for their use until 2004. So yeah, A-Rod did something commonly accepted as cheating in almost every sport, but up until baseball tested for them and had punishment, there was nothing to distinguish steroid use from vitamin supplements and eating your spinach (other than steroids needing a prescription, but that doesn’t seem to be the objection) except public perception, and public perception doesn’t sign the paycheck. So A-Rod will get some well-deserved derision and maybe lose some sponsorship money, too, but the organization that is Major League Baseball shouldn’t get free pass here, and nor should the players’ union — they resisted the implementation of these rules. Anyone discussing this? I don’t know — I’ve tried to avoid these stories. Too many sanctimonious sports pundits abound. (Personally, I think all modern electronic devices are performance-enhancing, so they’re all hypocrites if they use a word processor or cellphone to get their job done)

(Oh, and one could substitute law enforcement people not giving other law enforcement people e.g. parking tickets as another example of this, to name another example completely at random. Do they start parking illegally? You betcha.)

A Sports Question

Do two football teams meeting in a game, ever, ever like each other? I mean, for years I’ve been hearing variations of These two teams don’t like each other! in the pre-game blather.

Has anyone ever seen a player not make a tackle ot hard hit, or not pick up a fumble, because it turns out they liked the other team?