Page 11 - T.A.M. DYNAMICS (BEATS) E-BOOK

2 1 TECHNIQUE
To perform this skill the the the the rope can be be placed to the the the the the side or or or between the the the the the legs depending on the the the the the skill we we want to perform next Independent of the the the the the technique used (arms straight or or bent) the the the head should be be be be placed neutrally in in between the the the the arms arms during the the the the back beat the the the the same as when stretch- ing ing the the shoulders Because of of the the maximal explosive stretching of of the the the shoulders happening when swinging back performing this type of of beats increases the the the risk of of shoulder injury particularly to to the the the glenohu- meral area and the the the rotator cuff This maximal stretching (flexion effort) occurs as the the the the the result of the the the the the force force applied to the the the the the shoulders during the the the the the back beat this force force in in turn will depend on the the the the the the energy generated by the the the the body weight the the the the speed of of of rotation rotation and the the the the distance from our center of of of gravity to the the axis of of rotation rotation A greater amplitude on on on the the front beat will gen- erate more rotational energy during the the the de- scending phase If we have the the the the proper shoulder flexibility the the the the stress applied to the the the the glenohumer- al area will will be be be less less during the the the the back beat since we we will will be be be able to reach reach the the weightless moment without reaching maximum shoulder shoulder extension A lack of of flexibility will will mean our shoulders will will absorb the the the impact of of all the the the energy produced by the the the the front beat reaching full extension before at- taining the the the weightless moment and causing ma- jor stress to the the the glenohumeral area increasing the the risk of injury Shoulder flexibility strength and stability plays a a a critical role in in injury prevention ROPE
infographic
= 70 kg
V = velocity
Back beat 0 kg
0 kg
Front beat V2
glenohumeral stress V1
glenohumeral stress glenohumeral stress THE AERIAL MOVEMENT®
83
maximum weight Dynamometer test: V1
≈= ≈= 180 kg
kg
— V2
≈= ≈= 350 kg
kg
velocity
velocity
velocity
velocity