Chapter Two, The Breath, discusses breathing, breath support, relaxation, air compression, blowing exercises, the diaphragm, the lungs, inhaling and exhaling air, circular breathing, the relaxed throat, the glottis, warm-up exercises and excessive tension.
Really low sagging, like practically with your pants at your kneecaps is not in style right now, but sagging to show a little underwear, or the more PC term low rise is still in. Sagging is purely a thug influenced thing, dudes do this look like wannabe thugs that lost their belts in prison. I won't even lie.
Juniors: For the 'younger' figure (although I wear junior pants and left youth behind many years ago) - typically more straight up and down - generally 7 between bust/hips and waist measurement. Torsos may be shorter, shoulders and arms narrower. Juniors can usually wear guy's pants.