Pretty good overall and I really like the perspective of entering and exiting the court. What I think you miss a bit here is how the momentum must be checked or eased for entering the court just like when exiting. The forward movement is to receive the ball well with the best contact point they can achieve, but then lift to check the forward momentum.
Thanks. Maybe. I didn't emphasize it at the Australian Open since most coaches do exactly what you say. They emphasize what is known as loading, acceleration off contact footwork and deceleration which is what you are suggesting. Or technical differences. The purpose of this video is to show direction of the body and ball are not the same and often dictate, along with court position, the offense/defense quality of the ball. It is not meant as a technique or biomechanics approach. As you see, tour players now train using this concept.
How could I teach this to raw beginner groups? As I'm seeing more and more .. we teach a lot of lateral movement and not any sort of enter and exit the court .. and as an Aussie coach .. I see that our top players in pro ranks are learning or training in Spain etc .. and the Spanish are another level in tennis. How can we use these ideas for our basic hot shot lessons?
Hot Shots for youth players? I think you might have seen the Spanish X and V Drills (some on youtube). I think they are understated as for creating offense/defense recognition of footwork pattens and court position that set up offensive/neutral/defensive play. You can use hand-feeding first and then rallying situations (as used by Pennetta here). As the player moves in, consider attacking (low net clearance, better placement, options), as the player moves back, consider height and what neutralizes the opponent's offense. I think the Spanish are no longer producing great players but only Fokina and Alcaraz are the upcoming players. But the climate and clay courts are exception for most Europeans. Since there is a cluster of good players, it is natural other players go there. A bit like Florida, USA.
Maybe incorporate games? I use games where a player is forced into a defensive or offensive situation and learn the tactics out of that. Most coaches start a game with a neutral shot that is fed in the center. I don't think that makes sense. Start games with feeding a player out of position where both players figure out 1) recovery (footwork and shotmaking), 2) how and where to attack, 3) positional tennis. We do games where a player has to start with a Nadal reverse forehand from a defensive position or move in and use a windshield wiper forehand (finish below the waist) offensive ball.
6:25 Bzzz.Wrong! Inertia; a body at rest tends to stay at rest unless a force acts upon it. *facepalm* alrighty then. You can't use inertia interchangeably for both inertia and momentum. I thought maybe you just mixed them up for a second but later you clearly state the player has to overcome inertia when he's at a standstill, the correct usage, while next again, saying his inertia carries him off the court, the incorrect usage. So not a typo, you just don't know the difference. I think you meant "momentum". Well, whether you meant to or not that's the correct word. Momentum; A body in motion tends to stay in motion unless a force acts upon it. In all it seem kind of meaningless, entering and exiting the court. I mean, go to where you can hit the ball, regardless of whether it is in or out of the court, right? The tips about the difference between playing a short offensive shot and a deep neutral or defensive shot though, very good, thanks for the video. I'll have to concentrate on that now instead of tracking the ball...
No. It's inertia which applies to a body at rest and a body in motion. Not simply to a body at rest as you suggest. Most tennis pros think it's momentum which is different. A moving body is naturally not altered since it is inertia. So if you are skiing downhill, you will tend to ski downhill unless a force acts upon you. That is inertia. Momentum is the skiing force x time and if someone bumps you, they apply another vector, a change in momentum. That also leads to a change in inertia. Momentum often refers to the body in motion, not the resistance to change. The discussion is that inertia in moving is difficult to alter. Momentum is the impulse in moving (force x time).
In addition, this is a common drill and the terms (exit and enter) were borrowed from Toni Nadal. It does not refer to playing behind or in front of the baseline but the player moving across the baseline either way. That often determines the type of shot, defensive or offensive.
In your example of the skier, there are forces acting on them. They are accelerating down a slope at a rate relative to the slope and friction. Their gravitational potential energy in transferred into kinetic energy. Friction forces tend to slow them down but if u, the friction coefficient, is low enough and the normal force (mg) times the sin of the angle of the slope is high enough, then it overcomes the friction force and inertia, they slide down the hill. To stop they increase the friction coefficient by laying the skis at an angle to the descent and increasing the angle of the skis to reduce surface area in contact, the edges biting in. In this way they overcome their momentum, which is measured in units of mass times velocity, as opposed to kinetic energy which is mass times the square of the velocity. Also note that the acceleration is relative to the mass of an object and the force applied to it, but in acceleration on a slope both the force applied to the object by gravity and the inertia of the object are proprtional to the mass so they cancel each other out and acceleration is independent of mass. So objects of different weights accelerate at the same rate on a slope or free fall, except for the difference in friction, where a more massive object or a more dense object have proportionally less friction.
Fantastic lesson! You can see what Mr Fognini saw in Ms Penetta!!
This is very interesting technical details. Thanks for sharing! Hope to see more such level of videos from you!
Terrific video and analysis. Well done.
Excellente job my friend!
very interesting, deserve more views!
this is a great video. thank you.
Pretty good overall and I really like the perspective of entering and exiting the court. What I think you miss a bit here is how the momentum must be checked or eased for entering the court just like when exiting. The forward movement is to receive the ball well with the best contact point they can achieve, but then lift to check the forward momentum.
Thanks. Maybe. I didn't emphasize it at the Australian Open since most coaches do exactly what you say. They emphasize what is known as loading, acceleration off contact footwork and deceleration which is what you are suggesting. Or technical differences. The purpose of this video is to show direction of the body and ball are not the same and often dictate, along with court position, the offense/defense quality of the ball. It is not meant as a technique or biomechanics approach. As you see, tour players now train using this concept.
How could I teach this to raw beginner groups? As I'm seeing more and more .. we teach a lot of lateral movement and not any sort of enter and exit the court .. and as an Aussie coach .. I see that our top players in pro ranks are learning or training in Spain etc .. and the Spanish are another level in tennis. How can we use these ideas for our basic hot shot lessons?
Hot Shots for youth players? I think you might have seen the Spanish X and V Drills (some on youtube). I think they are understated as for creating offense/defense recognition of footwork pattens and court position that set up offensive/neutral/defensive play. You can use hand-feeding first and then rallying situations (as used by Pennetta here). As the player moves in, consider attacking (low net clearance, better placement, options), as the player moves back, consider height and what neutralizes the opponent's offense. I think the Spanish are no longer producing great players but only Fokina and Alcaraz are the upcoming players. But the climate and clay courts are exception for most Europeans. Since there is a cluster of good players, it is natural other players go there. A bit like Florida, USA.
Maybe incorporate games? I use games where a player is forced into a defensive or offensive situation and learn the tactics out of that. Most coaches start a game with a neutral shot that is fed in the center. I don't think that makes sense. Start games with feeding a player out of position where both players figure out 1) recovery (footwork and shotmaking), 2) how and where to attack, 3) positional tennis. We do games where a player has to start with a Nadal reverse forehand from a defensive position or move in and use a windshield wiper forehand (finish below the waist) offensive ball.
S/he has an indent ???
Flavia Penetta
beauty girl
6:25 Bzzz.Wrong!
Inertia; a body at rest tends to stay at rest unless a force acts upon it.
*facepalm* alrighty then. You can't use inertia interchangeably for both inertia and momentum. I thought maybe you just mixed them up for a second but later you clearly state the player has to overcome inertia when he's at a standstill, the correct usage, while next again, saying his inertia carries him off the court, the incorrect usage. So not a typo, you just don't know the difference.
I think you meant "momentum". Well, whether you meant to or not that's the correct word.
Momentum; A body in motion tends to stay in motion unless a force acts upon it.
In all it seem kind of meaningless, entering and exiting the court. I mean, go to where you can hit the ball, regardless of whether it is in or out of the court, right?
The tips about the difference between playing a short offensive shot and a deep neutral or defensive shot though, very good, thanks for the video. I'll have to concentrate on that now instead of tracking the ball...
No. It's inertia which applies to a body at rest and a body in motion. Not simply to a body at rest as you suggest. Most tennis pros think it's momentum which is different. A moving body is naturally not altered since it is inertia. So if you are skiing downhill, you will tend to ski downhill unless a force acts upon you. That is inertia. Momentum is the skiing force x time and if someone bumps you, they apply another vector, a change in momentum. That also leads to a change in inertia. Momentum often refers to the body in motion, not the resistance to change. The discussion is that inertia in moving is difficult to alter. Momentum is the impulse in moving (force x time).
Maybe I don't know about sports but I do know about physics.
Apparently you are not coachable, is that why you teach instead of play?
In addition, this is a common drill and the terms (exit and enter) were borrowed from Toni Nadal. It does not refer to playing behind or in front of the baseline but the player moving across the baseline either way. That often determines the type of shot, defensive or offensive.
No, I am an academian and coach who played at high level. I think you must be trolling?
In your example of the skier, there are forces acting on them.
They are accelerating down a slope at a rate relative to the slope and friction.
Their gravitational potential energy in transferred into kinetic energy.
Friction forces tend to slow them down but if u, the friction coefficient, is low enough and the normal force (mg) times the sin of the angle of the slope is high enough, then it overcomes the friction force and inertia, they slide down the hill.
To stop they increase the friction coefficient by laying the skis at an angle to the descent and increasing the angle of the skis to reduce surface area in contact, the edges biting in.
In this way they overcome their momentum, which is measured in units of mass times velocity, as opposed to kinetic energy which is mass times the square of the velocity.
Also note that the acceleration is relative to the mass of an object and the force applied to it, but in acceleration on a slope both the force applied to the object by gravity and the inertia of the object are proprtional to the mass so they cancel each other out and acceleration is independent of mass.
So objects of different weights accelerate at the same rate on a slope or free fall, except for the difference in friction, where a more massive object or a more dense object have proportionally less friction.