I still get this "cut" feeling in my lowerback sometimes when I twist or move in a random way. So I haven't jumped to a rim in 2 weeks, way too dangerous to make this come back.
For example, I went in the park to do chinups and when I put my feet back down on the floor, a bit harder than just a gentle touch, it stroke me in the back a bit.
Maybe that piriformis muscle is a bit tight and pulls on the nerves/whatever? I'm so afraid to jump (maximally).
One more thing - what stretches do you do? Because I for one can't understand this position at all:
I've tried it and I don't feel any stretch/don't know if that's the right way to do it... I need to search more on youtube.
I found these:
Also,
http://en.wikipedia.org/wiki/Piriformis_syndromeTo quote:
Inactive gluteal muscles also facilitate development of the syndrome.[citation needed] These are important in both hip extension and in aiding the piriformis in external rotation of the femur. A major cause for inactive gluteals is unwanted reciprocal inhibition from overactive hip flexors (psoas major, iliacus, and rectus femoris). This imbalance usually occurs where the hip flexors have been trained to be too short and tight, such as when someone sits with hips flexed, as in sitting all day at work. This deprives the gluteals of activation, and the synergists to the gluteals (hamstrings, adductor magnus, and piriformis) then have to perform extra roles they were not designed to do. Resulting hypertrophy of the piriformis then produces the typical symptoms.
Overuse injury resulting in piriformis syndrome can result from activities performed in the sitting position that involves strenuous use of the legs as in rowing/sculling and bicycling.
Runners, bicyclists and other athletes engaging in forward-moving activities are particularly susceptible to developing piriformis syndrome if they do not engage in lateral stretching and strengthening exercises. When not balanced by lateral movement of the legs, repeated forward movements can lead to disproportionately weak hip abductors and tight adductors.[9] Thus, disproportionately weak hip abductors/gluteus medius muscles, combined with very tight adductor muscles, can cause the piriformis muscle to shorten and severely contract. Upon a 40% increase in piriformis size, sciatic nerve impingement is inevitable. This means the abductors on the outside cannot work properly and strain is put on the piriformis.[9]
A bit about it:
