12 norska förstadivisionsspelare i fotboll
deltog i interventionsgruppen. Interventionsgruppen tränade
slingträning i Redcord (tidigare kallad S-E-T) 2 gånger i veckan i
8 veckor. 9 spelare på samma nivå fungerade som kontrollgrupp.
Spelarna som tränade i Redcord hade en signifikant förbättring av
statisk balans samt en ökad skottstyrka. Det var inga förändringar
hos kontrollgruppen. Detta är enligt vår vetskap den första
studien som dokumenterar att ett träningsprogram för corestabilitet
kan påverka prestationsvariablerna skottstyrka och balans hos
fotbollsspelare. Det är bara abstraktet som är publicerat.
Purpose: To determine the impact of a Sling Exercise Training (SET) core stability program on postural balance, kicking velocity, functional strength, and back pain in elite level soccer players.
Method: 12 Norwegian 1st division soccer players completed 8 wk x 2 d.wk-1 SET training with a main focus on the hip and trunk area. Each training session, athletes performed 8 different highly unstable, closed kinetic chain exercises in adjustable slings. Exercise difficulty was progressed by increasing the resistance arm and degree of instability. 4 of the training group had suffered extended periods of low back pain. 9 players of similar performance level served as a control group.
Results: Balance: Mean one-legged eyes closed COP sway velocity moment decreased 45 % in the worst leg (p < 0.01) and 18% in the best leg (p = 0.113). The mean difference in velocity moment between the legs was reduced from 51% to 3% (p=0.001). No change in balance performance was observed in the control group. Kicking: Ball velocity during one-step maximal velocity kicking (preferred leg) increased significantly in the training group (3.5%,) compared to controls (-2.3 %, p = 0,04). Torso functional strength: The 4 subjects with chronic low back all reported that pain was reduced after training. The training group, and particularly chronic low back pain subjects, significantly improved in a clinical test of pelvic rotational stability (p < 0.01, see picture of test condition).
Conclusion: This unique functional stability training program involving movements performed in unstable slings clearly improved static balance and reduced low back pain. In addition, a small but significant improvement in kicking performance was observed. To our knowledge this is the first study to demonstrate a direct performance enhancing effect of a core stability training program. Functional strength training in slings appears to be an effective modality for enhancing neuromuscular control and joint stability.