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- W2030756411 abstract "According to the spring mass model, leg stiffness (characterized by the measure of kleg) behavior is theoretically dependent on lower limb joint and trunk stiffness. Yet, the influence of the trunk as a possible regulator of kleg is unknown. This study investigated the influence of abdominal training on kleg during hopping tasks. Fourteen young male (age 18.5 ± 0.5 years, height 176.4 ± 4.3 cm, weight 69.9 ± 5.5 kg) soccer players (national level) participated in the study. Two groups (bracing B group, n = 7 vs. hollowing transversus abdominis [TrA] H group, n = 7) with identical training load followed an 8-week training program for abdominal strengthening. Contact time, flight time, jump height, and kleg were measured with an OptoJump system during a standardized hopping task (2.2 Hz) before and after the training program. Results for each group showed that only the H group increased kleg after the intervention (+15.7%) compared with the B group (+5.9%). This difference was explained by a 6.5% decrease in contact time in H group (-2.4% in B) with increased flight time (+8.8% in H vs. +2% in B). A large increase was found for jump height in H (+16.9%) compared with B group (+4.4%). This study showed that TrA strengthening improves leg stiffness in hopping tasks. Our findings suggest the potential role of abdominal muscles in controlling lumbopelvic stiffness as a part of the spring according to the spring mass model, and thus influencing kleg by reduced ground contact phase." @default.
- W2030756411 created "2016-06-24" @default.
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- W2030756411 date "2013-08-01" @default.
- W2030756411 modified "2023-10-18" @default.
- W2030756411 title "Does an Abdominal Strengthening Program Influence Leg Stiffness During Hopping Tasks?" @default.
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- W2030756411 doi "https://doi.org/10.1519/jsc.0b013e318278f0c7" @default.
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