A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Effect of External Work Magnitude on Mechanical Efficiency of Sledge Jumping (2024)
Seki, K., & Kyröläinen, H. (2024). Effect of External Work Magnitude on Mechanical Efficiency of Sledge Jumping. Journal of Applied Biomechanics, 40(5), 383-389. https://doi.org/10.1123/jab.2023-0257
JYU-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: Seki, Keitaro; Kyröläinen, Heikki
Lehti tai sarja: Journal of Applied Biomechanics
ISSN: 1065-8483
eISSN: 1543-2688
Julkaisuvuosi: 2024
Ilmestymispäivä: 16.08.2024
Volyymi: 40
Lehden numero: 5
Artikkelin sivunumerot: 383-389
Kustantaja: Human Kinetics Publishers
Julkaisumaa: Yhdysvallat (USA)
Julkaisun kieli: englanti
DOI: https://doi.org/10.1123/jab.2023-0257
Julkaisun avoin saatavuus: Ei avoin
Julkaisukanavan avoin saatavuus:
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/96981
Tiivistelmä
The mechanical efficiency of human locomotion has been studied extensively. The mechanical efficiency of the whole body occasionally exceeds muscle efficiency during bouncing type gaits. It is thought to occur due to elasticity and stiffness of the tendinomuscular system and neuromuscular functions, especially stretch reflexes. In addition, the lower limb joint kinetics affect mechanical efficiency. We investigated the impact of varying external work on mechanical efficiency and lower limb kinetics during repeated sledge jumping. Fifteen male runners performed sledge jumping for 4 minutes at 3 different sledge inclinations. Lower limb kinematics, ground reaction forces, and expired gases were analyzed. Mechanical efficiency did not differ according to sledge inclination. Mechanical efficiency correlated positively with the positive mechanical work of the knee and hip joints and the negative contribution of the hip joints. Conversely, it correlated negatively with both the positive and negative contributions of the ankle joint. This may be attributable to the greater workload in this study versus previous studies. To achieve greater external work, producing more mechanical energy at the proximal joint and transferring it to the distal joint could be an effective strategy for improving mechanical efficiency because of the greater force-generating capability of distal joint muscles.
YSO-asiasanat: jalat; nivelet; hyppääminen; teho (fysiikka); energiankulutus (aineenvaihdunta); biomekaniikka; liikeoppi
Vapaat asiasanat: energy expenditure; joint work; lower extremity; sledge track inclination
Liittyvät organisaatiot
OKM-raportointi: Kyllä
VIRTA-lähetysvuosi: 2024
Alustava JUFO-taso: 1
