What are the key differences between mesomorphs and ectomorphs in terms of their physical characteristics and how they respond to exercise and diet?

Mesomorphs typically have a muscular and athletic build, while ectomorphs are usually lean and slender. Mesomorphs tend to respond well to exercise and can easily build muscle, while ectomorphs may struggle to gain muscle mass and may need to focus more on strength training. In terms of diet, mesomorphs may have a higher metabolism and can often eat more without gaining weight, while ectomorphs may need to pay closer attention to their calorie intake to maintain or gain weight.