During which stage of adolescence do growth spurts generally occur in boys?

Boys typically experience growth spurts during mid-adolescence, which is roughly between the ages of 14 and 17. This period is characterized by a rapid increase in height, muscle mass, and overall physical development as the body undergoes hormonal changes associated with puberty. During mid-adolescence, testosterone levels rise significantly, stimulating growth plates and contributing to the physical changes observed, such as greater muscle definition and broader shoulders.

In contrast, early adolescence is often marked by the onset of puberty and initial physical changes, but the most significant growth spurts do not usually occur until mid-adolescence. Late adolescence, on the other hand, generally occurs after the peak growth has already been achieved, and while development continues, substantial growth spurts are normally completed by this time. Pre-adolescence is when growth rates are relatively stable and precedes the start of pubertal changes. Therefore, mid-adolescence effectively captures the peak period for growth spurts in boys.