41. Health premiums are sapping corporate balance sheets even more than the rising cost of energy. 42. Increases in unfair taxes and fines are sapping the ability of farmers to boost output. 43. Crises sapping faith in SAR officials : poll 44. A wet, energy-sapping golf course is perhaps the last thing Jones needs. 45. At the same time, the upcoming Labor Day weekend is also sapping investor interest. 46. NASCAR requires restrictor plates that diminish air flow to the carburetor, thereby sapping horsepower. 47. Calling is an energy-sapping activity. 48. He felt increasingly that his teaching duties were sapping his stamina for focused intellectual labour. 49. He led the sapping operations at the Siege of Glatz and the defence of Schweidnitz. 50. Clearly there is a strong evolutionary pressure driving such a complex, energy sapping process.