A lot of tennis players, from professional to recreational, grunt when they hit the ball while playing tennis. Is there a reason for this?   related:
While watching  play for the gold medal in London 2012, I noticed Williams was going about her business while Sharapova was grunting each time she hit the ball.  After doing some , grunting in tennis dates back to 1962. Although men grunt, women draw more attention due to their high-pitched grunts. In addition, there is an initiative to eliminate excess grunts in the next generation of tennis players.  Another quote from said research says:     "I have not found in my 32 years anybody who says grunting or not   grunting has an empirically positive or negative effect on performance   -- it's all about belief system."   What is this "belief system?"  If grunting is not related to performance, why do tennis players do it excessively?
I'm using custom post types, but they don't appear on tag pages along with regular posts and i'd like to include both standard and custom post types on tag or category pages. What would be required before the loop to include all posts? (including custom type). Updated: To add, I found this code , which worked perfectly for the first part: add_filter('pre_get_posts', 'query_post_type'); function query_post_type($query) {   if ( is_category() || is_tag() &amp;&amp; empty( $query-&gt;query_vars['suppress_filters'] ) ) {     $post_type = get_query_var('post_type');     if($post_type)         $post_type = $post_type;     else         $post_type = array('post','cpt'); // replace cpt to your custom post type     $query-&gt;set('post_type',$post_type);     return $query;     } }  Second question still remains though: Is there a way to allow readers to filter by post type? So either of the following would work..  example.com/tag/blue?post_type=custom example.com/tag/blue?post_type=post How to Run an app as Administrator without the prompt? When I start SQL Server Management Studio 2008, I get an error that's been around forever and is documented .  One of the suggestions to fix it that actually worked was to start SSMS with Run as Administrator. So I modified the properties of the shortcut to always run it as the administrator.  The only annoyance is that I get a prompt every single time asking whether I really want to do it. Is there a way to tell just this one program (SSMS) to not pop up the prompt, while keeping this behavior for other apps? Why aren't variable-length arrays part of the C++ standard? I'm about to use this diagram to make computing 3x3 determinants clear and easy for my students. I tried to add this picture to my lecture but it's blurred due to the bad quality of the picture. So i want to create exactly the same figure using latex.  I've searched and read a few topics about highlighting elements and diagonals in matrix but it does not work in this case. I want to add plus signs and minus signs as in the picture, and highlight elements in the matrice with elements outside the matrice.  I appreciate all your help and your advice. Thank you in advance ! What info does Google backup? Does anyone know what exactly does Google backup (and restore) when you enable that option?  Also, are we able to see this list somewhere? (Maybe hidden n-levels deep in Google Account information?)  Reason I ask is I've had the unfortunate experience of my SD Card dying on me, put in a temporary SD Card and allowed Google to do the auto-restore.  Some things that were restored:   Saved wireless networks Background Some apps - strangely enough only a subset of my apps were restored (some with data, some without). All previous apps were installed via Android Market.   Then finally got my new SD Card, put that in and the following were restored   Saved wireless networks Some apps - again, same problem... only a subset (different subset, even fewer apps). This time no data seemed to have been restored either.   I think it would be very helpful to be able to view/manage a list of what is backed up, and thus would be restored (but I have yet to find this list... if it even exists). Prove $(1+a+b)(1+b+c)(1+c+a)\ge 9(ab+bc+ca)$ How one can prove the following.  Let $a$, $b$ and $c$ be non-negative real numbers. Then the inequality holds:  $(1+a+b)(1+b+c)(1+c+a)\ge9(ab+bc+ca).$  WLOG one can assume that $0\le a\le b\le c$.  It is not difficult to prove the statement when $0\le a\le b\le c\le 1$ or $1\le a\le b\le c$. Why is it that Frisian is considered the closest related language to English? It is commonly asked "What is the closest language to English?" and the equally common answer is         Except that there is rarely a reason given for this connection; the most that is given are baldly stated 'facts' (e.g. "English and Dutch are in the same 'Low German' group")  Can anyone give any substantive reasons? For example, an comparative overlap of vocabulary, a distance metric of phonology, privately shared syntactic rules among all the rules in West German languages. Where did the age go on the network profile? Ever since the profile redo, the age was shown in the network profile, but not in the per-site profiles. So if someone wanted to see the age, they had to go to the network profile. However.. It's vanished! The field is still there in the profile editing, however. It doesn't appear as if this was implemented:   So... Where is it? Proof of Convergence: Babylonian Method $x_{n+1}=\frac{1}{2}(x_n + \frac{a}{x_n})$ Why is there a big delay after entering a wrong password? I notice a weird (well, according to me) thing about passwords. For example, if I type an incorrect password during login, there will be a few seconds' delay before the system tells me so. When I try to sudo with a wrong password I would also have to wait before the shell says "Sorry, try again".  I wonder why it takes so long to "recognize" an incorrect password? This has been seen on several distributions I use (and even OSX), so I think it's not a distribution specific thing. Why does Ubuntu 12.10 not detect my Win7 partition? How do berry mutations work? What are some important applications of the Erdős-Szekeres Theorem? Why isn't Google Chrome available in the Software Centre? PlotLegends won't generate automatically more than 15 labels in v10 Assume I wield a Whip in one hand and a dagger in the other.  If a creature moves from 5ft to 10ft it has technically moved out of my reach (dagger), but at the same time it is still inside my reach (whip). When does it provoke opportunity attacks from me?  I am fully aware that this would not enable me to make off-hand attacks since the whip is not a light weapon, just to cut that issue out of the question. Correct use of will & would? What would be the correct use of will &amp; would in these sentences?  1) What will happen if I say to my boss that I will not come tomorrow?  2) What will happen if I would say to my boss that I will not come tomorrow?  3) What will happen if I will say to my boss that I will not come tomorrow?  4) What would happen if I would say to my boss that I will not come tomorrow?  There are four sentences which one should I use and in which situation? Syntax error while creating DB2 Trigger What is wrong in the below trigger syntax, I am getting this error An unexpected token "INT" was found following " DECLARE NULL_ROW_ID".  Expected tokens may include:  "END-OF-STATEMENT".. SQLCODE=-104, SQLSTATE=42601, DRIVER=3.68.61  CREATE TABLE A (     A_ID INT NOT NUll,     A_CODE VARCHAR(100) NOT NULL,     PRIMARY KEY(A_ID) );  CREATE TABLE B (     B_ID INT NOT NUll,     B_CODE VARCHAR(100) NOT NULL,     A_ID INT,     PRIMARY KEY (B_ID),     FOREIGN KEY (A_ID) REFERENCES A (A_ID)  );  CREATE OR REPLACE TRIGGER B_TRIGGER AFTER UPDATE OF A_ID ON B REFERENCING NEW AS N OLD AS O FOR EACH ROW     WHEN (N.A_ID IS NULL)     BEGIN ATOMIC         DECLARE NULL_ROW_ID INT;         SET NULL_ROW_ID = (SELECT A_ID FROM A WHERE A_CODE = 'Custom Null String');         IF NULL_ROW_ID IS NULL THEN             SIGNAL SQLSTATE '70000' SET MESSAGE_TEXT = 'Custom Null String row not found.';         END IF;     SET N.A_ID = NULL_ROW_ID;     END @   It's on DB2 Express-C 10.5 How do I change my Stack Exchange password? How do I change my password?  I have a Stack Exchange account but can't seem to find the option to change my password.  Help please? New breaker and panel: What's the brown goo where they connect?