Basic sidemount control theory:
Your opponent cannot regain guard if you control the head and hips. He especially cannot regain guard if you force his head to the side with your shoulder while controlling the hips.
For these tips, imagine you are sidemount on the opponents right side.
Standard Sidemount Control #1:
- Left arm under head and gable gripped w/ other hand on opposite side of opponent’s body.
- Right arm and elbow running down his side with the elbow tight into his hips.
- Left shoulder should be forced into his jaw forcing him to look toward your left hand as much as possible.
- Left knee should be in his head.
- Right knee should be in his hip.
- Butt should be down as much as possible.
- Your sternum should be touching his sternum.
- Your head should be buried and turned to the side in his upper left shoulder.
Standard Sidemount Control #2:
- Left elbow jammed into the opposite side of his head.
- Right hand on the ground below his butt preventing him from moving his hips.
- Right knee jammed into his hip
- Your sternum should be touching his sternum.
- Move as one unit. If he moves away, your whole body follows. Your left elbow should be glued to his head and your left arm stays in the same rigid position.
Both require good head control. So a major factor to prevent someone from attaining good side mount control is to control their left bicep from restraining your head.