Bakgrund: Träning och spel för många golfare sker på olika underlag, vilket gör att frågor väcks kring överförbarheten mellan järnslag från konstgräs till järnslag från naturgräs. Tillgången till information om underlagets påverkan på ett golfslag är begränsad och det finns ingen tillgänglig vetenskaplig forskning som har undersökt om konstgräs kan påverka ett golfslag annorlunda jämfört med naturgräs. Syfte: Syftet med studien var att undersöka om carry och slaglängd i ett golfslag skiljer sig åt mellan naturgräs och konstgräs. Metod: Tre golfspelare med ett handicap <15 deltog i studien. Trackman användes för att mäta data från 30 slag på naturgräs och 30 slag på konstgräs. Insamlad data analyserades i SPSS med ett paired sample t-test. Resultat: Det var en signifikant skillnad i carry och slaglängd, som båda var längre på naturgräs (p<0.001; p=0.007). Bollhastighet var högre på naturgräs (p=0.024) medan spin rate var högre på konstgräs (p=0.042). Slutsats: Resultatet från studien visar att det finns en skillnad i bollflykt mellan underlagen, där carry och slaglängd är längre på naturgräs jämfört med konstgräs. Då antalet variabler som kan påverka slaglängden är många krävs det vidare forskning för att kunna generalisera resultatet.

<p>Aim<br />The purposes of the present study were, to determine if partial and full-swing shots performed by skilled golfers were organized in a proximal-to-distal sequencing (PDS) pattern and to examine the speed-summation effect at pelvis, upper torso and hand segments.</p><p>Method<br />Three-dimensional kinematic recordings of pelvis, upper torso, and hand were made while forty-seven skilled golfers stroke three different clubs a range of submaximal and maximal shot distances.</p><p>Results<br />This study showed a clear proximal-to-distal temporal relationship of movement onset and peak angular speed at the pelvis, upper torso and hand segments in the golf swing. The same temporal structure was evident at all test conditions, among different gender and level of expertise. Further, results revealed a summation effect of angular velocity from proximal-to-distal, with each succeeding segment generating a larger rotational speed than the proximal segment. However, the increment in speed from proximal-to-distal was different among gender and level of expertise. Conclusions The temporal relation of segment kinematics suggests a common PDS organization in partial and full-swing shots for skilled golfers. A speed-summation effect of segmental angular speed indicates that participants did utilize interaction torques in a proximal-to-distal manner. The role of the observed PDS organization and speed-summation effect in partial shots might be to improve accuracy and, potentially, golfers should concentrate on speed initially in learning the golf swing.</p>

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Aim<br />The purposes of the present study were, to determine if partial and full-swing shots performed by skilled golfers were organized in a proximal-to-distal sequencing (PDS) pattern and to examine the speed-summation effect at pelvis, upper torso and hand segments. Method<br />Three-dimensional kinematic recordings of pelvis, upper torso, and hand were made while forty-seven skilled golfers stroke three different clubs a range of submaximal and maximal shot distances. Results<br />This study showed a clear proximal-to-distal temporal relationship of movement onset and peak angular speed at the pelvis, upper torso and hand segments in the golf swing. The same temporal structure was evident at all test conditions, among different gender and level of expertise. Further, results revealed a summation effect of angular velocity from proximal-to-distal, with each succeeding segment generating a larger rotational speed than the proximal segment. However, the increment in speed from proximal-to-distal was different among gender and level of expertise. Conclusions The temporal relation of segment kinematics suggests a common PDS organization in partial and full-swing shots for skilled golfers. A speed-summation effect of segmental angular speed indicates that participants did utilize interaction torques in a proximal-to-distal manner. The role of the observed PDS organization and speed-summation effect in partial shots might be to improve accuracy and, potentially, golfers should concentrate on speed initially in learning the golf swing.