52K views · 219 reactions | Force Couple, Scapular Force Couple A force couple is a synergistic action of muscles to produce movement around a joint. Show trainees which muscles are used during this scapular exercise and illustrate perfect form and technique. Subscribe Now for Full Access: https://www.muscleandmotion.com/pricing/ Or try the free version: https://www.muscleandmotion.com/products/strength-training-app/ | Muscle and Motion | Facebook

The force-length relationship shows us that the least amount of force can be produced when a muscle is at its most lengthened and most shortened positions. That doesn’t mean we shouldn’t train in those positions it just means we can be limited in our gains if we train primarily in those positions. The hardest part of a machine leg curl is when the knee is flexed. Since that position in a seated leg curl is in a more favorable length for force production it’s reasonable to say this is a better op

Length tension relationship for skeletal muscle