Author(s): HE, J.1, SHI, S.2, HANG, B.3, HUI, R.4, CHEN, Z.5, ZHAO, H.6, ZHOU, G.7, CAI, X.8, Institution: NANJING NORMAL UNIVERSITY , Country: CHINA, Abstract-ID: 1927

INTRODUCTION:
Volleyball is a typical intermittent competitive sport, featuring frequent high-intensity jumps, rapid lateral movements, and alternating offensive and defensive transitions, which requires high-level physical fitness as the foundation for athletes to complete technical and tactical actions [1]. With the wide application of GPS and inertial motion analysis (IMA) in volleyball match analysis in recent years, the accurate monitoring of match load indicators has become possible, providing technical support for exploring the intrinsic relationship between match load and physical fitness.
METHODS:
12 high level matches’ data of 14 elite female college volleyball athletes [Age: (21.3±1.7) years old; Height: (181.1±4.5) cm; Weight: (71.6±5.5) kg] were recorded by IMA units (K-sport). The paired sample T-test was used to compare the differences between different positions and different quarters, significant difference was set at P < 0.05, and very significant difference was set at P < 0.01.
External match load indicators included total competition load, high-intensity competition load. Meanwhile, key physical fitness indicators of the subjects including aerobic capacity (maximal oxygen uptake, VO₂max), lower limb explosive force ( CMJ; SJ; DJ; VJ ;tested by Lifting Platform), agility (5-0-5 test，T test，4x5m circuit，Illinois), strength（squatting，bench-press，power clean，deadlift）and core stability ( tested by plank support time).
RESULTS:
The elite female volleyball athletes covered 74.5±12.7 min average playing time，The average total competition load of this team was 1128.0 ± 225.1 AU, the VO₂max (in absolute value) was 41.3 ± 3.1 ml/min, the relative value was 3.0 ± 0.3ml/kg/min, the average value of CMJ was 52.4 ± 4.8 cm, the average value of SJ was 50.0 ± 4.2 cm, the average value of DJ was 50.9 ± 4.9 cm, the average value of VJ was 291.4 ± 9.0 cm, the average value of Illinois was 17.8 ± 0.7 s, the average value of T-test was 11.9 ± 0.5 s, the average value of 5-0-5 test was 2.5 ± 0.1 s, the average value of 4x5m back-and-forth was 5.7 ± 0.2 s, the average value of squat was 106.5 ± 18.5 kg, the average value of high pull was 53.2 ± 5.0 kg, the average value of push press was 47.1 ± 7.3 kg, the average value of deadlift was 90.0± 10.9 kg, and the average value of plank was 180.6 ± 58.9 kg.
Vertical jump has a significantly strong positive correlation with high-intensity competition load (0.603; P < 0.01).The 4x5m shuttle test has a significantly strong positive correlation with total competition load (0.682;P < 0.01).CMJ has a significantly strong positive correlation with SJ (0.890;P<0.01) and DJ (0.887;P<0.01).
CONCLUSION:
In summary, it can be seen that jumping ability and agility are extremely important for elite female college volleyball players. In future training, elite female volleyball players need to strengthen more jumping-related training to enhance their jumping ability and improve their athletic performance.