PMID- 36263670
OWN - NLM
STAT- Publisher
LR  - 20240216
IS  - 1752-6116 (Electronic)
IS  - 1476-3141 (Linking)
DP  - 2022 Oct 20
TI  - Joint-level determinants of the dynamic strength index: implications for testing 
      and monitoring.
PG  - 1-11
LID - 10.1080/14763141.2022.2131614 [doi]
AB  - The aims of this study were to determine the associations and differences between 
      the traditional dynamic strength index (DSI(GRF), calculated from ground reaction 
      force [GRF] data) and joint-level dynamic strength indices (DSI(NJM), calculated 
      from net joint moment [NJM] data). Eight female NCAA Division I lacrosse players 
      performed three maximal effort isometric mid-thigh pulls (IMTP) and 
      countermovement jumps (CMJ). GRF and motion capture data were recorded and used 
      to calculate hip, knee, and ankle NJM. The ratio between peak forces during the 
      IMTP and CMJ tests was used to calculate the DSI(GRF) and the ratio of peak NJM 
      was used to calculate ankle, knee, and hip DSI(NJM). Associations and differences 
      between DSI(GRF) and DSI(NJM) were examined with Pearson's correlation 
      coefficients, paired t-tests and Hedge's g effect sizes. The results showed that 
      only the hip DSI(NJM) was correlated with DSI(GRF) (hip: p = 0.037; r = 0.738). 
      In addition, athletes exhibited significantly greater DSI(NJM) than DSI(GRF). 
      Although these results suggest DSI(GRF) are associated with hip DSI(NJM), the 
      fact that joint-level DSI(NJM) were generally greater than DSI(GRF) suggests the 
      ratio between peak NJM during the CMJ and IMTP may not provide intuitive or 
      useful data for strength and conditioning coaches or sport scientists.
FAU - Ahn, Nayun
AU  - Ahn N
AD  - Department of Physical Therapy - Program in Exercise and Rehabilitation Science, 
      Marquette University, Milwaukee, WI, USA.
FAU - Kim, Hoon
AU  - Kim H
AD  - Department of Sports Medicine, Soonchunhyang University, Asan, Republic of Korea.
FAU - Krzyszkowski, John
AU  - Krzyszkowski J
AD  - Department of Kinesiology & Sport Management, Texas Tech University, Lubbock, TX, 
      USA.
FAU - Roche, Stuart
AU  - Roche S
AD  - Department of Intercollegiate Athletics, Marquette University, Milwaukee, WI, 
      USA.
FAU - Kipp, Kristof
AU  - Kipp K
AUID- ORCID: 0000-0003-3909-5257
AD  - Department of Physical Therapy - Program in Exercise and Rehabilitation Science, 
      Marquette University, Milwaukee, WI, USA.
LA  - eng
PT  - Journal Article
DEP - 20221020
PL  - England
TA  - Sports Biomech
JT  - Sports biomechanics
JID - 101151352
SB  - IM
OTO - NOTNLM
OT  - Biomechanics
OT  - countermovement jump
OT  - dynamic strength deficit
OT  - isometric mid-thigh pull
EDAT- 2022/10/21 06:00
MHDA- 2022/10/21 06:00
CRDT- 2022/10/20 04:02
PHST- 2022/10/20 04:02 [entrez]
PHST- 2022/10/21 06:00 [pubmed]
PHST- 2022/10/21 06:00 [medline]
AID - 10.1080/14763141.2022.2131614 [doi]
PST - aheadofprint
SO  - Sports Biomech. 2022 Oct 20:1-11. doi: 10.1080/14763141.2022.2131614.