What leg are we mostly training in Copenhagen Adduction Exercise (CA)?

What leg are we mostly training in Copenhagen Adduction Exercise (CA)?The CA has shown a normalized electromyography (nEMG) activity of 108% of a maximal voluntary isometric contraction (MVIC) in the adductor longus of the upper leg whereas it is only 69.6% of the lower limb which are low compared to other exercises in study by Serner et al., 2014.⚽Background
Groin injuries is a common injury in football. A common assumption is that reduced hip adductor strength is a risk factor for groin injuries and therefore lack of absolute hip adduction strength and/or lack of hip adduction relative to hip abduction strength, may increase risk for groin strains.Serner et al. (2013) compared the muscle activity of the adductor longus (via EMG), during 8 different hip adduction strengthening exercises, in 40 elite male soccer player.1⃣ Isometric adduction Squeeze with a ball between the ankles (IBA)
2⃣ Isometric adduction Squeeze with a ball between the knees (IBK)
3⃣ Side-lying hip adduction (SLA)
4⃣ Sliding hip adduction/abduction exercise (SLIDE)
5️⃣Standing hip adduction with an elastic band (EB)
6⃣ Hip adductor machine (AM)
7⃣ Supine bilateral hip adduction (SBA)
8⃣ Copenhagen Adduction (CA)⚽The CA and EB promote high levels of dominant limb muscle activity, and have minimal equipment demands, but there’s a more significant degree of asymmetry between limbs with these exercises.⚽Therefore using Copenhagen Adduction mostly beneficial for the dominant leg (upper) as there other exercises there procedures more or similar EMG the non dominat leg.Ishoei et al. (2016) showed a 8 weeks CA protocol increased eccentric hip adduction and abduction strength by 35.7% and 20.3%, respectively, in two U-19 sub-elite soccer teams. Additionally, a 12.3% increase in hip adduction/abduction muscle strength ratio was observed.🏷️Serner, A., Jakobsen, M.D., Andersen, L.L., Hölmich, P., Sundstrup, E. and Thorborg, K., 2013. EMG evaluation of hip adduction exercises for soccer players: implications for exercise selection in prevention and treatment of groin injuries. ?Br J Sports Med?, pp.bjsports-2012🏷️Ishøi, L., Sørensen, C.N., Kaae, N.M., Jørgensen, L.B., Hölmich, P. and Serner, A., 2016. Large eccentric strength increase using the Copenhagen Adduction exercise in football: A randomized controlled trial. ?Scandinavian journal of medicine & science in sports?, ?26?(11), pp.1334-1342

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