Good news for the young already into strength training: strength gained can be long-lived. More good news: this is true even when interrupted by prolonged inactivity. No more moaning during forced down-time about lost time and lost muscle strength!!
You've heard your coach say: "You'll get it back fast." That was knowledge gained from experience and you witnessed its truth. I heard it 20 years ago in my swimming years. Now it's supported by science and the traditional concept of "muscle memory" has been put to rest in favor of proof that strength training actually makes physical and physiological changes in the muscle itself before overload hypertrophy.
More info here.
- Mary Boudreau Conover