𝘾𝙈𝙅 𝙖𝙣𝙙 𝙛𝙖𝙩𝙞𝙜𝙪𝙚 𝙢𝙤𝙣𝙞𝙩𝙤𝙧𝙞𝙣𝙜, 𝙬𝙝𝙚𝙣 𝙅𝙪𝙢𝙥 𝙃𝙚𝙞𝙜𝙝𝙩 (𝙘𝙢) 𝙖𝙡𝙤𝙣𝙚 𝙞𝙨 𝙣𝙤𝙩 𝙩𝙝𝙚 𝙗𝙚𝙨𝙩 𝙢𝙚𝙩𝙧𝙞𝙘 𝙩𝙤 𝙙𝙚𝙩𝙚𝙘𝙩 𝙣𝙚𝙪𝙧𝙤𝙢𝙪𝙨𝙘𝙪𝙡𝙖𝙧 𝙛𝙖𝙩𝙞𝙜𝙪𝙚 𝙞𝙣 𝙤𝙪𝙧 𝙖𝙩𝙝𝙡𝙚𝙩𝙚𝙨 👇🏼 1️⃣Jump Height and fatigue ? Not clear evidence …. Cormack et al. observed altered flight time to contraction time ratio up to 2 days after elite competition... “despite little changes in jump height performance” Different movement solutions occur to maintain a desired “performance” metric such as jump height or power output Legg et al. suggested that altering CMJ mechanics assisted with maintenance of jump height while in a fatigued state, with changes in dip magnitude observed midseason despite no change in jump height. 2️⃣RSI-mod as an alternative variable ?? CMJ height alone may not always discriminate between rugby league cohorts, emphasizing the requirement for the associated underpinning force-time variables [to indicate jump ‘strategy’], or RSImod at the very least McMahon et al. reported that a group of combined professional senior SL and RLC rugby league players who performed the CMJ with a “higher RSImod” demonstrated higher force, velocity and thus power outputs. 3️⃣Sensitive to change of different metrics , Jump Height 🆚 RSI-mod? CMJ height was not sensitive to change in neuromuscular status of elite Australian Rules Football athletes pre- to post-match, from 48-hours pre- to 48-hours post-match 📌Conclusions - RSImod or FT:CT may prove more useful overall as an indicator of readiness, slow SSC activity, and neuromuscular fatigue as they impact the coordinative strategy and jumping performance. - A decline of 8% in FT:CT or RSImod would indicate a change requiring intervention as at this level of neuromuscular fatigue there are considerable changes to performance 📚 📕Hughes, S., Warmenhoven, J., Haff, G. G., Chapman, D. W., & Nimphius, S. (2022). Countermovement jump and squat jump force-time curve analysis in control and fatigue conditions. The Journal of Strength & Conditioning Research, 36(10), 2752-2761. 📗McMahon, J. J., Jones, P. A., & Comfort, P. (2022). Comparison of countermovement jump–derived reactive strength index modified and underpinning force-time variables between super league and championship rugby league players. The Journal of Strength & Conditioning Research, 36(1), 226-231. 📘Martinez, D. B. (2016). THE USE OF REACTIVE STRENGTH INDEX, REACTIVE STRENGTH INDEX MODIFIED, AND FLIGHT TIME: CONTRACTION TIME AS MONITORING TOOLS. Journal of Australian Strength & Conditioning, 24(5) 📘Bishop, C., Jordan, M., Torres-Ronda, L., Loturco, I., Harry, J., Virgile, A., ... & Comfort, P. (2023). Selecting metrics that matter: comparing the use of the countermovement jump for performance profiling, neuromuscular fatigue monitoring, and injury rehabilitation testing. Strength & Conditioning Journal, 45(5), 545-553.show more

Ángel Aceña Rodriguez

20,485 subscribers

Поделиться Скачать