the right hand doesnât know what the left hand is doing Confusion, disorder, disarray. Now used derogatorily to indicate a lack of coordination, organization, or direction, in its original New Testament context (with hands reversed) the phrase denoted a desirable state.
A vigorous game of singles tennis can expect to burn between 528 and 872 calories, depending on your body weight, according to MayoClinic.com. This is comparable to an hour of solid running at 5 miles per hour, or an intense game of basketball.
To increase your tennis serve speed, the most important thing to look at is your technique. You may think that you are hitting the ball very hard already because you feel like you are putting a lot of effort whenever you hit a serve. But somehow, the ball doesnât threaten your opponent.