biostudies-literatureUnknown17(11)Armstrong RLiverpool John Moores UniversityGLOBUS<h4>Introduction</h4>Accentuated-eccentric loading (AEL) takes advantage of the high force producing potential of eccentric muscle contractions, potentially maximising mechanical tension within the muscle. However, evidence is lacking on how AEL squatting may load the involved musculature, limiting scientifically justified programming recommendations. The purpose of this study was to investigate the effects of concentric and eccentric loads on joint loading and muscle activity of the lower limbs.<h4>Methods</h4>Resistance trained males performed traditional squatting (20-100% of concentric one-repetition maximum [1RM]) and AEL squatting with eccentric loads (110-150% of 1RM) provided by a novel motorised isotonic resistance machine (Kineo). Kinetics and kinematics of the hip, knee, and ankPloS onee0276096https://www.ebi.ac.uk/biostudies/studies/S-EPMC9624406biostudies-literatureAn investigation of movement dynamics and muscle activity during traditional and accentuated-eccentric squatting.PMC9624406Jarvis JStewart CO'Brien TBaltzopoulos VClark DLangan-Evans CArmstrong RfalseAn investigation of movement dynamics and muscle activity during traditional and accentuated-eccentric squatting.<h4>Introduction</h4>Accentuated-eccentric loading (AEL) takes advantage of the high force producing potential of eccentric muscle contractions, potentially maximising mechanical tension within the muscle. However, evidence is lacking on how AEL squatting may load the involved musculature, limiting scientifically justified programming recommendations. The purpose of this study was to investigate the effects of concentric and eccentric loads on joint loading and muscle activity of the lower limbs.<h4>Methods</h4>Resistance trained males performed traditional squatting (20-100% of concentric one-repetition maximum [1RM]) and AEL squatting with eccentric loads (110-150% of 1RM) provided by a novel motorised isotonic resistance machine (Kineo). Kinetics and kinematics of the hip, knee, and ank2022-01-01T00:00:00Z20222025-04-19T02:35:47.732Z2025-04-19T02:35:47.732ZS-EPMC96244063631852710.1371/journal.pone.0276096