I'd like to build up my thigh muscles, what are some good workouts I can do that won't put stress on my knees?
136997
Cycling would probably be your best.
451014
definately leg lifts.  lay on your back and lift your legs 6 inches off the ground all the while breathing.  that is key.  \n\nanother one is to lay on your stomach and rest your body on your forearms and then lift up.  like a push up but your forearms stay on the flat ground.  put your toes up and hold while breathing for as long as you can.  \n\nstomach cruches are great.  like a sit up, but you only come up half way.
88102
If your joints are strong and not prone to injury you can run some intervals first to get your heart rate up.  Run up and down the stairs starting with your left foot.  Then do it with your right foot.  Then walk it off for 30 seconds and repeat until you start to feel too much strain.\nFrom there start doing a bunch of body weight excercises.  Push ups, squats, lunges, crunches, leg lifts, etc. and keep your heart rate up in between by running in place or doing jumping jacks or something similar.
307206
go biking, thats great for bun and thighs, other then that, squats, lunges and the Windsor Pilates bun and thigh workout
536807
Remember, your butt is just a group of 3 muscles (gluteous maximus/medius/minimus - I'm not making this up as silly as they sound). Like any muscles you can overload them and they will bulk up. the best exercises are ones that force you to move your thigh backwards (ie. not leg curls or reverse leg curls - these exercise focus on the quadriceps and hamstring muscles. Try sitting on you hands and knees and lifting you leg up and down. Depending on your legs strength you can add ankle weights or resistance bands to increase the demands on your butt muscles. Just like any other routine it will take time butt you will get a stronger, more defined butt.
69545
Being prone to Detractions of teh Patella myself, the only real way to strengthen laterally the knee is to strengthen all leg muscles equally.  I have overly strong quads and am very lacking in the hamstring dept.  Lunges and lunges done to the side are good.  Just remember to always center your movement on the axis your foot is moving.  That way yu will not put lateral stress on your knee, but still strengthen those muscles.
643545
Butterfly stretches where you sit with your knees out and the bottoms of your feet together have some one press down on your knees and hold for a count thirty if you knees touch the floor have a person stand on your legs to add more pressure BE CAREFUL NOT TO START FROM THE KNEES START CLOSE TO THE HIPS AND WORK YOUR WAY OUT TO THE KNEES.\nLots of splits, regular splits and Jean Claude van damn splits(sorry!only way I know how to explain it)And lots of high kicking\nIt's not going to happen over night be patient and stretch slow and consistent
146759
Tips for thighs slimming\n\nExercise For Thighs - 1: Lay on your back on a carpeted floor with your hands behind your head. Put your feet on a bench or chair such that upper legs make a 90 degree angle. Lift your upper back off of the ground and contract your abdominal part.\n\nExercise For Thighs - 2: Lay on your back on a flat surface on a floor mat with your hands on sides of your back. Move your legs as if you are cycling. Do it for 5 minutes daily.\n\nFollow a negative calorie food diet.\nEat plenty of fruits, vegetables, wholegrain bread, pasta, rice, beans and cereal without any oily toppings. Choose low fat or fat free varieties.\n\nFlax seed oil and Evening Primrose Oil are considered to be as fat burning supplements. The effect of PGE1 is to force fat to be used as fuel.
568009
You can start out my doing push ups on your knees; keep you back straight, don't sag in the middle and look forward to keep you airways open. you could also try lifting wieghts to build some upperbody strength. good luck.
533131
Good old fashion squats. The key is to push up with your heels after you squatted. It works the butt and the back of your thighs. Or you can climb up and down the stairs 5 times. Both are free :)
215414
Don't jog.  Do lots of leg exercises.\n\nSquats\nisometrics (sit against the wall without the chair, 60 secs.)\ncalf raises (lots)\nshort sprints (all out 20-40 yards)\njump up to and down from a bench (hops)\nJump rope\nLunges\nstrength training for power (heavy weight, low rep)\nAbdominals (crunches, sit-ups, leg lifts...)
126569
do this thigh exercise. lean against the wall with feet away from the wall for about 12 inches or so (futher if you are taller), slide your body downwards, bending the knees, making a 90 degree bent between the thighs and lower legs.  hold this composure for a few mins.  great thighs work-out and is do-able anywhere where there are walls.
118748
Try pliometrics. Lunges work too. Jumping rope and anything that can make your muscles think they have to work harder than they do. Figuratively speaking of course. Try tying a piece of surgical tubing to your ankle and anchor it somewhere. Make sure it is resistant enough and do high-knee type steps.
263888
Walking, jogging, dancing, elliptical, cycling, stair climbing, and the crossramp machine will help tone your thighs.  You may be built with a pear-shape body so even though you want to greatly reduce your thighs, you may never get it proportional unless you have surgery.  I don't recommend surgery.
264
unless the cracking is painful, it is not unusual or dangerous for your knees to "crack".\n\nLunges are excellent for strengthening the muscles around the knee joint. Make sure that you are not leaning over the knee, that the knee is right above the foot during the lunge and that you maintain a straight upright movement.\n\nDo not do hamstring excercises that will pull on the knee joint if you have problems with your knee. \n\nelipticals are good for running on with minimal knee and ankle stress. \n\nyou can also get large elastic bands...stand in them, and step out to the side pulling on the bands, then back in. Don't pull harder than is comfortable, this will help increase the stablization of the knee.\n\nLaying on your back you can pull your knee to your chest, and then extend it, locking your knee holding the leg just over the ground..repeating, this will also help strengthen the muscles around the knee with minimal weight on it.\n\nAlways is good to speak with a doctor or physical therapist if you have concerns.
378739
I have one word for you: lunges. Work each leg separately, 15 reps x3 then together (as deep knee bends) again 15 x3. Do this every day and you will see results within 2 weeks easy. You're working all major muscles in your lower body. It's simple, doesn't cost a thing, you can do it anywhere, anytime, it improves your balance and best of all it's effective.
59799
Weight Training is your answer!  Don't worry about bulking up, women don't have the hormones necessary to grow very large or bulky muscles (naturally) even with years of weight training.  This is especially true for those with ectomorphic (skinny) body types.  Squats and lunges are the exercises you're looking for to increase the thickness of your butt and thighs.  \n\nHere's a complete list of exercises for the legs:\nhttp://www.preventdisease.com/fitness/Strength_Exercises_legs.html\n\nIf you are beginner, always seek the assistance of a certified personal trainer before attempting any weight training exercises.