10 #Knee-Friendly Lower-Body Toners | Shape Magazine
7 exercises using only body weight, so no equipment is necessary. Do it three times a week, on alternating days, to tighten up everywhere.
Duck Squat: Stand with feet wider than shoulder-width apart, toes turned out 45 degrees, holding a single dumbbell with both hands in front of hips (or fold arms in front of chest without dumbbell). Make it harder: Use a 10- to 15-pound dumbbell. Lower into plié squat until knees are bent as far as 90 degrees, knees behind toes.
15 minute workout for leg and core muscular endurance. Squats, Lunges, Calf Raises
Tone Lift & Cinch! TLC Workout | Tone It Up