Where did these come from?

[strav]

41. The X and Y factors _____________
42. Swing the clubhead _____________
43. Compact swing _____________
44. Grip it and rip it _____________
45. Hitting early/late _____________
46. One piece takeaway _____________
47. Ring the bell _____________
48. Shake hands with the target _____________
49. Magic move _____________
50. Hit past the chin _____________