For the first exercise, Linda's going to stand on one leg with her shoulders back - good posture. Tighten your core, slowly lower your leg, then come back up again. You need to make sure that the knee is over the foot and your tummy is pulled in and tight, and glute muscles are pulled in and tight in the hip too. 

Now we're going to progress on to a lunge, and as Linda goes down into the lunge you can see that she keeps her knee not too far forwards, over her foot. The back knee is dropping down to the ground and she's got a nice straight line through her body.

Keep your core tight, keep your bottom tight, and go down again. Carry on going up and down slowly, keeping everything controlled.

To start off with the lunges, you're better off doing them like this, with a stable base, so you're not moving too much. That way you will get control of the movement. 

If we want to progress this on and make it a little bit more difficult, we'll introduce some movement.

So this time Linda's going to step forward into the lunge, go down and then come back up, and then alternate sides. 

You just want to make sure that every step is symmetrical, and that you keep that position that you had in the initial exercise. No wobbling, no going to one side, and make sure that this knee is facing the ground - so this exercise might be one that's best to do initially in front of a mirror.

Now, to progress the exercise on one more time and start to add an element of golf to it, we're going to introduce some rotation. Golf is very much rotation of the upper body around a stable lower body, so that's what we're going to introduce into the exercise. But you shouldn't do this exercise until you find the other exercises very easy. 

Go down into the lunge, and then twist towards the bent leg side. Back to the middle, and then stand back up. Again, alternate sides.

As you do this one, try and make sure that your right knee faces the floor still.

By keeping the core and the lower abdominals tight, you'll have more control over what the legs are doing, and it also makes the exercise very much in one plane, so you're not wobbling from side to side. It also introduces new muscles like along the sides of the legs. We want to be strengthening the front of the thighs, the back of the bottom, and moving the upper body.

These are some great exercises for your golf: for your leg strength, your core strength, and they'll make a big difference to your swing.