| Objective: In order to explore the structural basis of the huge stress produced by the splitting bricks of Wushu gongli,protect the hands of athletes from injury,and guide scientific training,in this study,the high-level brick-breaking athletes who participated in the national competition were selected,and their hands were scaned by spiral CT,and then measured,to find the morphological and structural characteristics of the hand muscle groups.Methods: Eight single handed and brick-breaking martial arts players,eight tennis players and eight ordinary people,were selected as the power group,the tennis group and the ordinary group,all male,25-30 years old,right-handed,no significant difference in height and weight.Image acquisition by 64 slice spiral CT and application of mimics 17.0 software to three-dimensional reconstruction of hand thenar,hypothenar muscle group and pisiform bone,hamate bone and the fifth metacarpal bone related to muscle group in three groups,and get the volume and density(average CT value)of each muscle group and bone in three groups for statistical analysis,and compare the difference of morphology and structure of thenar and hypothenar muscle group and the index(volume and density)of skeletal muscle group and bone structure in three groups relevance.Results:(1)CT value of thenar muscle group(unit: HU): 68.50±3.72 in right hand of gongli group was higher than 67.19±1.09 in tennis group and 66.02±0.74 in general group(P<0.01,P<0.01).The left hand 67.84±2.46 was higher than that of the control group 65.74±0.57(P<0.05).The right hand of tennis group was larger than that of common group(P<0.05),and the left hand had no statistical difference.CT value of hypothenar muscle group(unit: HU): 65.71±0.38 in right hand of gongli group was higher than that of tennis group(P<0.01,P<0.01),64.58±0.38 in tennis group and64.40±0.88 in general group.The left hand of 64.75±0.66 was higher than that of 63.35±0.84 in the control group(P<0.05).There was no significant difference between the tennis group and the general group.(2)The volume of thenar muscle group(unit: cm3): 20.52±1.47 in the right hand of the gongli group was larger than that of the tennis group 17.13 ± 2.52 and the common group15.73±1.53(P<0.01,P<0.001).Left hand 19.07±1.18 was higher than tennis group15.64±3.17 and control group 15.36±1.59(P<0.01,P<0.01).There was no significant difference in the left hand(P<0.05).The volume of hypothenar muscle group(unit: cm3): 17.81±0.76 in the right hand of the gongli group was larger than 15.54±3.27 in the tennis group and 14.85±0.99 in the general group(P<0.01,P <0.001).The left hand was 16.85±3.17 larger than that of the tennis group14.44±1.42 and the control group 14.43±0.84(P<0.01,P<0.01).There was no statistical difference between the left and right hands in the tennis group.(3)The CT value of the right hypothenar muscle group was 65.71±0.38 HU,which was higher than that of the left 64.75 ± 0.66HU(P<0.001).There was no significant difference between the left and right hands of thenar muscles.The CT value of thenar and hypothenar muscles in tennis group was higher than that in left hand group,but there was no statistical difference.The volume of thenar and hypothenar muscles in the right hand group was 20.52±1.47cm3,17.81±0.76cm3,respectively,which were larger than that in the left hand group(P<0.05,P<0.01).In tennis group,the volume of thenar and hypothenar were 17.13±2.52cm3,15.54±3.27cm3,respectively,which were larger than that of left hand(P<0.01,P <0.05).There was no significant difference between the left and right hands in the general group.(4)There was a significant positive correlation between the volume of thenar muscle group and the volume of pisiform bone and the fifth metacarpal bone(P< 0.01,P<0.05),andthere was a significant positive correlation between the density of thenar muscle group and the density of hamate bone and the fifth metacarpal bone(P<0.01).There was no significant correlation between tennis group and general group.Conclusion: The long-term breaking bricks of Wushu gongli can cause high intensity stress stimulation to hand muscles and bones.It may increase the volume and density of the hand thenar and small thenar muscle groups,produce characteristic changes,and have a positive correlation with the generation of huge strength.On the one hand,this kind of change may buffer the huge external force,increase the attack intensity and anti strike ability,on the other hand,it may reduce the local pain of athletes and protect the musculoskeletal tissue from injury.The characteristic changes of these morphological structures will be helpful to evaluate the training effect,such as the mechanism of strength generation,the posture,balance and stability of the movement,and also provide morphological basis for the diagnosis,treatment and rehabilitation of hand injury. |
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