With lower tension you gain more power but also lose control. Feel Arm shock thinner more lower more better less thicker less higher less worse more To increase the durability of your strings you should not expose your racquet to extreme heat, cold or humidity. Therefore you should always keep your racquet in its bag. To protect your racquet head you can use a head tape. This is useful if playing on clay court or if the strings are not protected enough by the racquet headguard.
Strings lose elasticity with time, one type of string faster, another type of string slower.
In general you shouldn't play a string longer than 2 to 3 months. Then it's about time to cut out the strings and restring your racquet. Assistant editing by Mary Centanni.