BACK LEVER
A back lever is a static hold performed on the rings. A back lever is rated as an 'A' value skill on the Code of Points, a scale from A to F, with F being the most difficult.
A back lever is performed by lowering from an inverted hang until the gymnast's body is parallel to the ground.
Performing a back lever requires a high degree of strength in the chest and shoulders, a lot of core tension must be generated to stay horizontal.
Here is the my tutorial for back lever:
STEP 1:
Grab the bar in an overhand grip. Jump or tuck up into a ball pulling yourself in a skin-the-cat manner. Lower yourself until your back is approximately parallel with the ground. You can stay tucked up tightly into a ball, with a rounded back, or allow your legs to open up slightly as is shown below. Hold this position like this:
STEP 2:
Next step or step 2 is Half Back Lever.Pull yourself up until your head is facing the ground and your legs are overhead. Straighten the hips out, but keep the knees bent. This time keep the knees together. Keep this alignment lower until you�re parallel with the ground and hold.

STEP 3:
Next level of progression is straddle back lever.
Pull yourself up until your head is facing the ground with your legs overhead. Straighten out the legs at the knees and the hips. Spread your legs as wide into the straddle position as you can. Keep this alignment lower until you�re parallel with the ground and hold. The wider your straddle the easier this will be.

STEP 4:
And the finally full back lever!Pull yourself up until your head is facing the ground with your legs overhead. Straighten out the legs at the knees and hips. This time keep the legs together. Your body should be in one straight line through your legs. Keep this alignment lower until your parallel with the ground and hold. Sometimes the body takes a slightly bowed position. This is equally fine, but if you�d like to avoid it, contract the abs more to enter a hollow position.
Good luck!
