how long must a fast be to start burning body fat
To maximize the fat burning during weight training, women should aim for 12 to 15 repetitions per exercise, White says, and focus on a higher number of reps rather than constantly boosting the weight. Men should aim for eight to 12 reps and increase the weight periodically.
Heart Rate. One way to estimate how long it takes for you to start burning calories from fat is to consider your target heart rate. A 2009 study conducted by the University of St. Thomas in St. Paul, Minnesota, concluded that maximal fat oxidation was achieved at 60.2 to 80 percent of your MHR.