the best racket to improve strength is
1.babolat
2.wilson
3.head
There is no best tennis racket in the world. All tennis rackets have different abilities and technology. What I think is a good tennis racket is the Babolat Aero GT's and Wilson BLX's, they have a really good technology such as the cortex system and the GT technology.
it depends on what works for you, but the number one tennis player, Novak Djokovic uses the head tennis racket, and it works really good for him.
i think the one with the best durability and the best bounce and the best feel for your racket is : Wilson us open
Wilson BLX or Babolat Aero Pro drive
All you need is: Tennis balls (one or more - usually 3 is good) A Tennis Racket A Tennis court (with proper measures, marks and net) A partner - or 3 if you want to play doubles :)
Any sporting good store should have badminton rackets and depending on how dedicated you are feeling a regular old tennis racket works just fine. Finding a tennis racket from a friend or in your garage or from a second hand store is cheap and easy. However there are expensive version if price isn't a problem and you can get a custom Badminton racket. Determine what is best for your budget and interest and skill level and then choose appropriately.
When we touch the grip it should be thick and soft and grippy. The best grip company i know are Babolat, Head, Wilson.
Wilson.
Some equipments would be:racketstennis ballsnetscourtsproper tennis attire (for safety of the player/s)scoring system
you deside if u like a light racket or a heavier one, then you find your grip size which you put your thumb on the bottom of the racket and it should go to the tip of your pinky, whatever feels comfotable you dont want it to big or small so it slips. you dont want it to be too heavy because it will take more time for you to swing and more difficult.
Calf raisers and leg press. You want to improve strength in your calves, hamstrings and quads.
You need to find a very good coach, and work at your game on a daily basis. The reason you need a coach is that tennis technique is not intuitive. You won't be able to figure out the best way to hit the strokes without a coach. And in tennis, technique is everything.