is there literature about power lifting and weight lifting and the hamstring curl or knee flexor capabilities?
Most they do squat, deadlift, goodmorning, straight leg deadlift, but it seems the leg curl of knee flexors are less trained. For instance biceps femoris has an aponeurosis and the knee flexor could be underdeveloped.
In practice I see people squating 100+ but leg curl with very low KG.
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Regarding the specific sporting task for powerlifters and weightlifters, although the movements you are asking about can be used as an accessory movement, they are nothing more than accessory movements as opposed to being actual associate movements. I'm not sure if you will find relevant literature for either of these populations considering there isn't a high-level coach in this world (to my knowledge) who would prescribe such movement to a healthy athlete over a back squat, front squat, paused squat, etc.
I too have wondered about various assistant movements and their carry over to the competition task, but there is little to no evidence suggesting that it does. If anything, it is only contributing to the cross-sectional area of the musculature whether that be for hypertrophic purposes or musculature maintenance purposes, rather than aiding in improving the competition task.
Dear Peter Griepink,
Trying to reply your question,
- Escamilla, R. F., Lowry, T. M., Osbahr, D. C., & Speer, K. P. (2001). Biomechanical analysis of the deadlift during the 1999 Special Olympics World Games. Medicine & Science in Sports & Exercise, 33(8), 1345-1353.
- Escamilla, R. F., Francisco, A. C., FLEISIG, G. S., Barrentine, S. W., WELCH, C. M., Kayes, A. V., ... & ANDREWS, J. R. (2000). A three-dimensional biomechanical analysis of sumo and conventional style deadlifts. Medicine & Science in Sports & Exercise, 32(7), 1265-1275.
- Cutrufello, P. T., Gadomski, S. J., & Ratamess, N. A. (2017). An evaluation of agonist: Antagonist strength ratios and posture among powerlifters. The Journal of Strength & Conditioning Research, 31(2), 298-304.
There are some papiers which analyse kinematically, the deadlifts.
And also more related with your question: Cutrufello, P.T. and Gadomski , S.J., (2017) examinated the agonist:antagonist strength ratios, and the ROMs to identify maximal isometric force using handheld dynamometry: shoulder flexion:extension, shoulder horizontal adduction:abduction, shoulder external rotation:internal rotation, hip flexion:extension, hip abduction:adduction, knee flexion:extension, and cervical flexion:extension.
All of this was done to identify any imbalances amon the powerlifters. I think it could be the answer, or the key point to search your own reponse.
I hope have been useful.
Cheers up for your work.
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