Although the lactate threshold is defined as the point when lactic acid starts to accumulate, some testers approximate this by using the point at which lactate reaches a concentration of 4 mM (at rest it is around 1 mM).
The Greater Milwaukee Open was a regular golf tournament in Wisconsin on the PGA Tour. It was played annually in July in the Milwaukee suburb of Brown Deer at the Brown Deer Park Golf Course. U.S. Bancorp was the main sponsor of the tournament. The 2009 purse was $4 million with a winner's share of $720,000.
The 2023 U.S. Open will be held June 15-18, and Los Angeles Country Club will become just the third U.S. Open venue in Southern California, joining Riviera Country Club in nearby Pacific Palisades (1948) and Torrey Pines Golf Course in San Diego (2008, 2021).