hey which racket is better for healthy stroke besides that all professial player using iso shape racket well i got 22 - 23 pound string tension stiff flex racket is it good for fast strokes?
Oval is thought to give more power if hit 100% correctly, ISO is more forgiving and therefore widely used (even the pros dont hit the sweet spot all the time). Assuming you have the technique and strength a stiffer racquet and tighter strings should give you more power (too a point). If theres anything wrong with your technique though it will have a negative effect.
can khan mark the small small sweetspot at oval head? that small small sweetspot is booming power.... as for fast strokes, accuracy is more demanding, thus, higher string tension will help. as morewood said, your technique & skill need to be good to use higher tension....