If you're confused, that's because lactic acid training is kind of confusing. Basically, the belief is that by doing lots of repetitions (about 2-3 sets of 12-25 repetitions) of an exercise, using a ...

You’re racing against another person for 26 miles and as you approach the last quarter-mile, the two of you start to sprint as fast as you can. Your leg muscles start to burn, and they hurt so much ...

Personal trainer Kirsty Welsh reveals what causes lactic acid and how to get rid of it. You know you've produced lactic acid when your muscles have a burning sensation during and after intense ...