You need good leg and hip alignment for posture and effective workout technique. Learn the position used in Pilates, with an exercise to achieve it.
CHAPTER 4: BODY ALIGNMENT, POSTURE, AND GAIT
Realign The Feet, Legs & Hips Weekly Posture Tune Up With
Pilates: Advice and Strategies
Yoga For Posture Alignment: 9 Poses to Save Your Spine - Welltech
12 Best Hip Flexor Stretches to Reduce Back and Hip Pain
Realign The Feet, Legs & Hips Weekly Posture Tune Up With Maryann
How To Fix Sway Back Posture - Posture Direct
Proper Body Alignment - Bone Health & Osteoporosis Foundation
Yoga Feet Alignment, Series on Yoga Alignment, Asana Alignment
Marguerite Ogle MS, RYT - Verywell Fit
Ballet Basics: Posture and Alignment
Stretches for Hip Alignment
Recovering From a Broken Hip: 7 Strength-Building Exercises
How to Fix Rotated Pelvis With Clinical Somatics Exercises