Abdominal muscles in that area include: External intercostal muscles (between the ribs) Rectus abdominus (between the ribs and the pubic bone) External obliques (toward the side) A muscle strain ...

increased strength of the respiratory muscles (internal and external intercostals and diaphragm); increased lung capacity and volume Aerobic Hypertrophy means an increase in size, so muscle ...

increased strength of the respiratory muscles (internal and external intercostals and diaphragm) Aerobic Hypertrophy means an increase in size, so muscle hypertrophy means the muscles get bigger.