I was 112 kg 5 years ago i'm 78 kg now but my thighs flaccid sort of how to tighten my thighs ! did fast walking for couple hours help or should run?

Tightening Thighs: Tone inner thighs w extended leg lifts, inner thigh press, standing thigh press, deep squat,wall squat, lunge, Thigh ball squeeze,walking, swimming, biking & in-line skating. Tone Thighs w plie, squat, wall squat, ball squat, Plyometric Squat,stair steps, lunges, lunges w dumbbells, ball squeeze & single leg Circle. Running, walking are all good as well as weight training. God luck.

Good job!: Hi. Good job on the weight loss! That shows commitment to a healthier lifestyle and perseverance. Walking (briskly) and jogging are both good. At 78 years old, comorbid conditions like heart disease, arthritis, etc need to be considered. But plenty of people your age run/jog, so if you're healthy enough for it, you pick. It needs to be something you like doing and will stay with. Good luck!